Skip to content
  • Categories
  • Recent
  • Tags
  • Popular
  • Users
  • Groups
Collapse
Brand Logo

ModalAI Forum

  1. ModalAI Support Forum
  2. Ask your questions right here!
  3. VOXL FPV Racing 4-in-1 ESC with flight core v2 and voxl2

VOXL FPV Racing 4-in-1 ESC with flight core v2 and voxl2

Scheduled Pinned Locked Moved Ask your questions right here!
31 Posts 3 Posters 5.9k Views 2 Watching
  • Oldest to Newest
  • Newest to Oldest
  • Most Votes
Reply
  • Reply as topic
Log in to reply
This topic has been deleted. Only users with topic management privileges can see it.
  • Alex KushleyevA Alex Kushleyev

    @Jetson-Nano , if the voxl_esc driver is started by PX4 running on the Flight Core, it should print out debugging information to the UART console. The log below was taken from PX4 running on VOXL2 DSP, but the output should be the same when using Flight Core V2.

    Please also note that the Flight Core (V2), when powered up, starts immediately (as opposed to VOXL2 booting takes a few seconds), so FC V2 will try to detect the ESC before the ESC exits bootloader (which takes 1 second after power is applied) and will fail to detect the ESC. This was fixed in our FC V2 drone config, please check your voxl-esc driver behavior. Here is the commit that added the delay of 1.5 seconds before starting voxl esc driver on FC V2:

    • https://github.com/modalai/px4-firmware/pull/70/commits/55742d298bf9241a2af5aa2c7ba3a26788073356
    • https://github.com/modalai/px4-firmware/pull/70/commits/1c11e2e0ac3fcc19cb45ab59292b3cf5f4fdb348

    (voxl-esc driver log from VOXL2 DSP is below)

    INFO  [muorb] SLPI: VOXL_ESC: Starting VOXL ESC driver
    INFO  [muorb] SLPI: VOXL_ESC: Opening UART ESC device 2, baud rate 2000000
    INFO  [muorb] SLPI: VOXL_ESC: Successfully opened UART ESC device
    INFO  [muorb] SLPI: VOXL_ESC: Detecting ESCs...
    INFO  [muorb] SLPI: VOXL_ESC: 	ESC ID     : 0
    INFO  [muorb] SLPI: VOXL_ESC: 	Board Type : 37: ModalAi 4-in-1 ESC (M0134-1)
    INFO  [muorb] SLPI: VOXL_ESC: 	Unique ID  : 0x203330385246571900480024
    INFO  [muorb] SLPI: VOXL_ESC: 	Firmware   : version   39, hash eb6fb500
    INFO  [muorb] SLPI: VOXL_ESC: 	Bootloader : version  183, hash b4fa2cf8
    INFO  [muorb] SLPI: VOXL_ESC: 	Reply time : 1646us
    INFO  [muorb] SLPI: VOXL_ESC:
    INFO  [muorb] SLPI: VOXL_ESC: 	ESC ID     : 1
    INFO  [muorb] SLPI: VOXL_ESC: 	Board Type : 37: ModalAi 4-in-1 ESC (M0134-1)
    INFO  [muorb] SLPI: VOXL_ESC: 	Unique ID  : 0x2033303852465719004D004D
    INFO  [muorb] SLPI: VOXL_ESC: 	Firmware   : version   39, hash eb6fb500
    INFO  [muorb] SLPI: VOXL_ESC: 	Bootloader : version  183, hash b4fa2cf8
    INFO  [muorb] SLPI: VOXL_ESC: 	Reply time : 621us
    INFO  [muorb] SLPI: VOXL_ESC:
    INFO  [muorb] SLPI: VOXL_ESC: 	ESC ID     : 2
    INFO  [muorb] SLPI: VOXL_ESC: 	Board Type : 37: ModalAi 4-in-1 ESC (M0134-1)
    INFO  [muorb] SLPI: VOXL_ESC: 	Unique ID  : 0x203330385246571900500042
    INFO  [muorb] SLPI: VOXL_ESC: 	Firmware   : version   39, hash eb6fb500
    INFO  [muorb] SLPI: VOXL_ESC: 	Bootloader : versiINFO  [qshell] Send cmd: 'voxl_esc start'
    INFO  [muorb] SLPI: VOXL_ESC: 	Reply time : 1120us
    INFO  [muorb] SLPI: VOXL_ESC:
    INFO  [muorb] SLPI: VOXL_ESC: 	ESC ID     : 3
    INFO  [muorb] SLPI: VOXL_ESC: 	Board Type : 37: ModalAi 4-in-1 ESC (M0134-1)
    INFO  [muorb] SLPI: VOXL_ESC: 	Unique ID  : 0x2033303852465719004D0050
    INFO  [muorb] SLPI: VOXL_ESC: 	Firmware   : version   39, hash eb6fb500
    INFO  [muorb] SLPI: VOXL_ESC: 	Bootloader : version  183, hash b4fa2cf8
    INFO  [muorb] SLPI: VOXL_ESC: 	Reply time : 617us
    INFO  [muorb] SLPI: VOXL_ESC:
    INFO  [muorb] SLPI: VOXL_ESC: Use extened rpm packet : 1
    INFO  [muorb] SLPI: VOXL_ESC: All ESCs successfully detected
    
    Jetson NanoJ Offline
    Jetson NanoJ Offline
    Jetson Nano
    Veteran
    wrote on last edited by Jetson Nano
    #6

    @Alex-Kushleyev Thank you for reverting back. I will verify this and get back.

    I changed the firmware version to the voxl-fpv-dev still the FC is not detecting the ESC.

    if i start esc through voxl_esc start , it is starting

    could please verify the parameters I mentioned.

    nsh> voxl_esc status
    INFO  [voxl_esc] Max update rate: 0 Hz
    INFO  [voxl_esc] Outputs on: no
    INFO  [voxl_esc] UART port: /dev/ttyS4
    INFO  [voxl_esc] UART open: no
    INFO  [voxl_esc] 
    INFO  [voxl_esc] Params: VOXL_ESC_CONFIG: 1
    INFO  [voxl_esc] Params: VOXL_ESC_MODE: 0
    INFO  [voxl_esc] Params: VOXL_ESC_BAUD: 250000
    INFO  [voxl_esc] Params: VOXL_ESC_FUNC1: 101
    INFO  [voxl_esc] Params: VOXL_ESC_FUNC2: 104
    INFO  [voxl_esc] Params: VOXL_ESC_FUNC3: 102
    INFO  [voxl_esc] Params: VOXL_ESC_FUNC4: 103
    INFO  [voxl_esc] Params: VOXL_ESC_SDIR1: 0
    INFO  [voxl_esc] Params: VOXL_ESC_SDIR2: 0
    INFO  [voxl_esc] Params: VOXL_ESC_SDIR3: 0
    INFO  [voxl_esc] Params: VOXL_ESC_SDIR4: 0
    INFO  [voxl_esc] Params: VOXL_ESC_RPM_MIN: 5500
    INFO  [voxl_esc] Params: VOXL_ESC_RPM_MAX: 15000
    INFO  [voxl_esc] Params: VOXL_ESC_T_PERC: 90
    INFO  [voxl_esc] Params: VOXL_ESC_T_DEAD: 20
    INFO  [voxl_esc] Params: VOXL_ESC_T_EXPO: 35
    INFO  [voxl_esc] Params: VOXL_ESC_T_MINF: 0.150000
    INFO  [voxl_esc] Params: VOXL_ESC_T_COSP: 0.990000
    INFO  [voxl_esc] Params: VOXL_ESC_VLOG: 0
    INFO  [voxl_esc] Params: VOXL_ESC_PUB_BST: 1
    INFO  [voxl_esc] Params: VOXL_ESC_T_WARN: 0
    INFO  [voxl_esc] Params: VOXL_ESC_T_OVER: 0
    INFO  [voxl_esc] Params: GPIO_CTL_CH: 0
    INFO  [voxl_esc] 
    INFO  [voxl_esc] -- ID: 0
    INFO  [voxl_esc]    Motor:           1
    INFO  [voxl_esc]    Direction:       1
    INFO  [voxl_esc]    State:           0
    INFO  [voxl_esc]    Requested:       0 RPM
    INFO  [voxl_esc]    Measured:        0 RPM
    INFO  [voxl_esc]    Command Counter: 0
    INFO  [voxl_esc]    Voltage:         0.000000 VDC
    INFO  [voxl_esc] 
    INFO  [voxl_esc] -- ID: 1
    INFO  [voxl_esc]    Motor:           4
    INFO  [voxl_esc]    Direction:       1
    INFO  [voxl_esc]    State:           0
    INFO  [voxl_esc]    Requested:       0 RPM
    INFO  [voxl_esc]    Measured:        0 RPM
    INFO  [voxl_esc]    Command Counter: 0
    INFO  [voxl_esc]    Voltage:         0.000000 VDC
    INFO  [voxl_esc] 
    INFO  [voxl_esc] -- ID: 2
    INFO  [voxl_esc]    Motor:           2
    INFO  [voxl_esc]    Direction:       1
    INFO  [voxl_esc]    State:           0
    INFO  [voxl_esc]    Requested:       0 RPM
    INFO  [voxl_esc]    Measured:        0 RPM
    INFO  [voxl_esc]    Command Counter: 0
    INFO  [voxl_esc]    Voltage:         0.000000 VDC
    INFO  [voxl_esc] 
    INFO  [voxl_esc] -- ID: 3
    INFO  [voxl_esc]    Motor:           3
    INFO  [voxl_esc]    Direction:       1
    INFO  [voxl_esc]    State:           0
    INFO  [voxl_esc]    Requested:       0 RPM
    INFO  [voxl_esc]    Measured:        0 RPM
    INFO  [voxl_esc]    Command Counter: 0
    INFO  [voxl_esc]    Voltage:         0.000000 VDC
    INFO  [voxl_esc] 
    voxl_esc: cycle: 0 events, 0us elapsed, 0.00us avg, min 0us max 0us 0.000us rms
    voxl_esc: output update interval: 0 events, 0.00us avg, min 0us max 0us 0.000us rms
    INFO  [mixer_module] Param prefix: VOXL_ESC
    control latency: 0 events, 0us elapsed, 0.00us avg, min 0us max 0us 0.000us rms
    Channel Configuration:
    Channel 0: func:   0, value: 0, failsafe: 0, disarmed: 0, min: 5500, max: 15000
    Channel 1: func:   0, value: 0, failsafe: 0, disarmed: 0, min: 5500, max: 15000
    Channel 2: func:   0, value: 0, failsafe: 0, disarmed: 0, min: 5500, max: 15000
    Channel 3: func:   0, value: 0, failsafe: 0, disarmed: 0, min: 5500, max: 15000
    
    Alex KushleyevA 1 Reply Last reply
    0
    • Eric KatzfeyE Eric Katzfey

      @Jetson-Nano How are the VOXL_ESC parameters set on your FCv2? There could be a UART baud rate mismatch between what FCv2 is using and what the ESC is using.

      Jetson NanoJ Offline
      Jetson NanoJ Offline
      Jetson Nano
      Veteran
      wrote on last edited by Jetson Nano
      #7

      @Eric-Katzfey @Alex-Kushleyev

      Voxl2 is connected to Flight core v2 through telem 1.
      ESC is connected to flight core through telem 2.
      the parameters are the following

      Screenshot from 2025-04-22 09-41-07.png

      Screenshot from 2025-04-22 09-42-31.png

      Screenshot from 2025-04-22 09-40-50.png

      1 Reply Last reply
      0
      • Jetson NanoJ Jetson Nano

        @Alex-Kushleyev Thank you for reverting back. I will verify this and get back.

        I changed the firmware version to the voxl-fpv-dev still the FC is not detecting the ESC.

        if i start esc through voxl_esc start , it is starting

        could please verify the parameters I mentioned.

        nsh> voxl_esc status
        INFO  [voxl_esc] Max update rate: 0 Hz
        INFO  [voxl_esc] Outputs on: no
        INFO  [voxl_esc] UART port: /dev/ttyS4
        INFO  [voxl_esc] UART open: no
        INFO  [voxl_esc] 
        INFO  [voxl_esc] Params: VOXL_ESC_CONFIG: 1
        INFO  [voxl_esc] Params: VOXL_ESC_MODE: 0
        INFO  [voxl_esc] Params: VOXL_ESC_BAUD: 250000
        INFO  [voxl_esc] Params: VOXL_ESC_FUNC1: 101
        INFO  [voxl_esc] Params: VOXL_ESC_FUNC2: 104
        INFO  [voxl_esc] Params: VOXL_ESC_FUNC3: 102
        INFO  [voxl_esc] Params: VOXL_ESC_FUNC4: 103
        INFO  [voxl_esc] Params: VOXL_ESC_SDIR1: 0
        INFO  [voxl_esc] Params: VOXL_ESC_SDIR2: 0
        INFO  [voxl_esc] Params: VOXL_ESC_SDIR3: 0
        INFO  [voxl_esc] Params: VOXL_ESC_SDIR4: 0
        INFO  [voxl_esc] Params: VOXL_ESC_RPM_MIN: 5500
        INFO  [voxl_esc] Params: VOXL_ESC_RPM_MAX: 15000
        INFO  [voxl_esc] Params: VOXL_ESC_T_PERC: 90
        INFO  [voxl_esc] Params: VOXL_ESC_T_DEAD: 20
        INFO  [voxl_esc] Params: VOXL_ESC_T_EXPO: 35
        INFO  [voxl_esc] Params: VOXL_ESC_T_MINF: 0.150000
        INFO  [voxl_esc] Params: VOXL_ESC_T_COSP: 0.990000
        INFO  [voxl_esc] Params: VOXL_ESC_VLOG: 0
        INFO  [voxl_esc] Params: VOXL_ESC_PUB_BST: 1
        INFO  [voxl_esc] Params: VOXL_ESC_T_WARN: 0
        INFO  [voxl_esc] Params: VOXL_ESC_T_OVER: 0
        INFO  [voxl_esc] Params: GPIO_CTL_CH: 0
        INFO  [voxl_esc] 
        INFO  [voxl_esc] -- ID: 0
        INFO  [voxl_esc]    Motor:           1
        INFO  [voxl_esc]    Direction:       1
        INFO  [voxl_esc]    State:           0
        INFO  [voxl_esc]    Requested:       0 RPM
        INFO  [voxl_esc]    Measured:        0 RPM
        INFO  [voxl_esc]    Command Counter: 0
        INFO  [voxl_esc]    Voltage:         0.000000 VDC
        INFO  [voxl_esc] 
        INFO  [voxl_esc] -- ID: 1
        INFO  [voxl_esc]    Motor:           4
        INFO  [voxl_esc]    Direction:       1
        INFO  [voxl_esc]    State:           0
        INFO  [voxl_esc]    Requested:       0 RPM
        INFO  [voxl_esc]    Measured:        0 RPM
        INFO  [voxl_esc]    Command Counter: 0
        INFO  [voxl_esc]    Voltage:         0.000000 VDC
        INFO  [voxl_esc] 
        INFO  [voxl_esc] -- ID: 2
        INFO  [voxl_esc]    Motor:           2
        INFO  [voxl_esc]    Direction:       1
        INFO  [voxl_esc]    State:           0
        INFO  [voxl_esc]    Requested:       0 RPM
        INFO  [voxl_esc]    Measured:        0 RPM
        INFO  [voxl_esc]    Command Counter: 0
        INFO  [voxl_esc]    Voltage:         0.000000 VDC
        INFO  [voxl_esc] 
        INFO  [voxl_esc] -- ID: 3
        INFO  [voxl_esc]    Motor:           3
        INFO  [voxl_esc]    Direction:       1
        INFO  [voxl_esc]    State:           0
        INFO  [voxl_esc]    Requested:       0 RPM
        INFO  [voxl_esc]    Measured:        0 RPM
        INFO  [voxl_esc]    Command Counter: 0
        INFO  [voxl_esc]    Voltage:         0.000000 VDC
        INFO  [voxl_esc] 
        voxl_esc: cycle: 0 events, 0us elapsed, 0.00us avg, min 0us max 0us 0.000us rms
        voxl_esc: output update interval: 0 events, 0.00us avg, min 0us max 0us 0.000us rms
        INFO  [mixer_module] Param prefix: VOXL_ESC
        control latency: 0 events, 0us elapsed, 0.00us avg, min 0us max 0us 0.000us rms
        Channel Configuration:
        Channel 0: func:   0, value: 0, failsafe: 0, disarmed: 0, min: 5500, max: 15000
        Channel 1: func:   0, value: 0, failsafe: 0, disarmed: 0, min: 5500, max: 15000
        Channel 2: func:   0, value: 0, failsafe: 0, disarmed: 0, min: 5500, max: 15000
        Channel 3: func:   0, value: 0, failsafe: 0, disarmed: 0, min: 5500, max: 15000
        
        Alex KushleyevA Offline
        Alex KushleyevA Offline
        Alex Kushleyev
        ModalAI Team
        wrote on last edited by
        #8

        @Jetson-Nano said in VOXL FPV Racing 4-in-1 ESC with flight core v2 and voxl2:

        if i start esc through voxl_esc start , it is starting

        Can you please provide the debug prints that voxl_esc driver outputs when you call voxl_esc start ?

        Alex

        Jetson NanoJ 1 Reply Last reply
        0
        • Alex KushleyevA Alex Kushleyev

          @Jetson-Nano said in VOXL FPV Racing 4-in-1 ESC with flight core v2 and voxl2:

          if i start esc through voxl_esc start , it is starting

          Can you please provide the debug prints that voxl_esc driver outputs when you call voxl_esc start ?

          Alex

          Jetson NanoJ Offline
          Jetson NanoJ Offline
          Jetson Nano
          Veteran
          wrote on last edited by Jetson Nano
          #9

          @Alex-Kushleyev When I run it for sometime it is makes the ESC blink once.
          then once again if I run the command it gives the following statement
          Error [voxl_esc] Task already running

          Alex KushleyevA 1 Reply Last reply
          0
          • Jetson NanoJ Jetson Nano

            @Alex-Kushleyev When I run it for sometime it is makes the ESC blink once.
            then once again if I run the command it gives the following statement
            Error [voxl_esc] Task already running

            Alex KushleyevA Offline
            Alex KushleyevA Offline
            Alex Kushleyev
            ModalAI Team
            wrote on last edited by
            #10

            @Jetson-Nano , you can stop the task and run it again or just look at the console output when you power on FC V2, so you see what happens when voxl_esc task prints when it start for the first time.

            Jetson NanoJ 1 Reply Last reply
            0
            • Alex KushleyevA Alex Kushleyev

              @Jetson-Nano , you can stop the task and run it again or just look at the console output when you power on FC V2, so you see what happens when voxl_esc task prints when it start for the first time.

              Jetson NanoJ Offline
              Jetson NanoJ Offline
              Jetson Nano
              Veteran
              wrote on last edited by Jetson Nano
              #11

              @Alex-Kushleyev

              nsh> voxl_esc stop
              ERROR [voxl_esc] timeout, forcing stop
              ERROR [voxl_esc] failed restoring uart to original state
              ERROR [voxl_esc] error closing uart
              nsh> voxl_esc start
              ERROR [px4_work_queue] wq:ttyS4 not available
              ERROR [px4_work_queue] init failed
              INFO  [voxl_esc] Starting VOXL ESC driver
              INFO  [voxl_esc] Params: VOXL_ESC_CONFIG: 1
              INFO  [voxl_esc] Params: VOXL_ESC_MODE: 0
              INFO  [voxl_esc] Params: VOXL_ESC_BAUD: 250000
              INFO  [voxl_esc] Params: VOXL_ESC_FUNC1: 101
              INFO  [voxl_esc] Params: VOXL_ESC_FUNC2: 104
              INFO  [voxl_esc] Params: VOXL_ESC_FUNC3: 102
              INFO  [voxl_esc] Params: VOXL_ESC_FUNC4: 103
              INFO  [voxl_esc] Params: VOXL_ESC_SDIR1: 0
              INFO  [voxl_esc] Params: VOXL_ESC_SDIR2: 0
              INFO  [voxl_esc] Params: VOXL_ESC_SDIR3: 0
              INFO  [voxl_esc] Params: VOXL_ESC_SDIR4: 0
              INFO  [voxl_esc] Params: VOXL_ESC_RPM_MIN: 5500
              INFO  [voxl_esc] Params: VOXL_ESC_RPM_MAX: 15000
              INFO  [voxl_esc] Params: VOXL_ESC_T_PERC: 90
              INFO  [voxl_esc] Params: VOXL_ESC_T_DEAD: 20
              INFO  [voxl_esc] Params: VOXL_ESC_T_EXPO: 35
              INFO  [voxl_esc] Params: VOXL_ESC_T_MINF: 0.150000
              INFO  [voxl_esc] Params: VOXL_ESC_T_COSP: 0.990000
              INFO  [voxl_esc] Params: VOXL_ESC_VLOG: 0
              INFO  [voxl_esc] Params: VOXL_ESC_PUB_BST: 1
              INFO  [voxl_esc] Params: VOXL_ESC_T_WARN: 0
              INFO  [voxl_esc] Params: VOXL_ESC_T_OVER: 0
              INFO  [voxl_esc] Params: GPIO_CTL_CH: 0
              nsh> 
              

              can you verify whether it is a parameter related error. I have mentioned the parameters in the above thread.

              Alex KushleyevA 1 Reply Last reply
              0
              • Jetson NanoJ Jetson Nano

                @Alex-Kushleyev

                nsh> voxl_esc stop
                ERROR [voxl_esc] timeout, forcing stop
                ERROR [voxl_esc] failed restoring uart to original state
                ERROR [voxl_esc] error closing uart
                nsh> voxl_esc start
                ERROR [px4_work_queue] wq:ttyS4 not available
                ERROR [px4_work_queue] init failed
                INFO  [voxl_esc] Starting VOXL ESC driver
                INFO  [voxl_esc] Params: VOXL_ESC_CONFIG: 1
                INFO  [voxl_esc] Params: VOXL_ESC_MODE: 0
                INFO  [voxl_esc] Params: VOXL_ESC_BAUD: 250000
                INFO  [voxl_esc] Params: VOXL_ESC_FUNC1: 101
                INFO  [voxl_esc] Params: VOXL_ESC_FUNC2: 104
                INFO  [voxl_esc] Params: VOXL_ESC_FUNC3: 102
                INFO  [voxl_esc] Params: VOXL_ESC_FUNC4: 103
                INFO  [voxl_esc] Params: VOXL_ESC_SDIR1: 0
                INFO  [voxl_esc] Params: VOXL_ESC_SDIR2: 0
                INFO  [voxl_esc] Params: VOXL_ESC_SDIR3: 0
                INFO  [voxl_esc] Params: VOXL_ESC_SDIR4: 0
                INFO  [voxl_esc] Params: VOXL_ESC_RPM_MIN: 5500
                INFO  [voxl_esc] Params: VOXL_ESC_RPM_MAX: 15000
                INFO  [voxl_esc] Params: VOXL_ESC_T_PERC: 90
                INFO  [voxl_esc] Params: VOXL_ESC_T_DEAD: 20
                INFO  [voxl_esc] Params: VOXL_ESC_T_EXPO: 35
                INFO  [voxl_esc] Params: VOXL_ESC_T_MINF: 0.150000
                INFO  [voxl_esc] Params: VOXL_ESC_T_COSP: 0.990000
                INFO  [voxl_esc] Params: VOXL_ESC_VLOG: 0
                INFO  [voxl_esc] Params: VOXL_ESC_PUB_BST: 1
                INFO  [voxl_esc] Params: VOXL_ESC_T_WARN: 0
                INFO  [voxl_esc] Params: VOXL_ESC_T_OVER: 0
                INFO  [voxl_esc] Params: GPIO_CTL_CH: 0
                nsh> 
                

                can you verify whether it is a parameter related error. I have mentioned the parameters in the above thread.

                Alex KushleyevA Offline
                Alex KushleyevA Offline
                Alex Kushleyev
                ModalAI Team
                wrote on last edited by
                #12

                @Jetson-Nano said in VOXL FPV Racing 4-in-1 ESC with flight core v2 and voxl2:

                ERROR [px4_work_queue] wq:ttyS4 not available

                the error above seems like an issue.

                Also is your ESC actually running at 250K baud rate? Did you verify this using voxl-esc tools?

                Additionally, it seems the voxl_esc driver does not produce the prints I was expecting, let me check to make sure the FC V2 is using the latest voxl_esc implementation.

                Alex

                Jetson NanoJ 1 Reply Last reply
                0
                • Alex KushleyevA Alex Kushleyev

                  @Jetson-Nano said in VOXL FPV Racing 4-in-1 ESC with flight core v2 and voxl2:

                  ERROR [px4_work_queue] wq:ttyS4 not available

                  the error above seems like an issue.

                  Also is your ESC actually running at 250K baud rate? Did you verify this using voxl-esc tools?

                  Additionally, it seems the voxl_esc driver does not produce the prints I was expecting, let me check to make sure the FC V2 is using the latest voxl_esc implementation.

                  Alex

                  Jetson NanoJ Offline
                  Jetson NanoJ Offline
                  Jetson Nano
                  Veteran
                  wrote on last edited by Jetson Nano
                  #13

                  @Alex-Kushleyev
                  Yes it is running in the 250k baud rate.
                  I did not verify with the voxl-esc tools. I directly connected it to the FC.
                  I am using the voxl-fpv-dev version of px4

                  Alex KushleyevA 1 Reply Last reply
                  0
                  • Jetson NanoJ Jetson Nano

                    @Alex-Kushleyev
                    Yes it is running in the 250k baud rate.
                    I did not verify with the voxl-esc tools. I directly connected it to the FC.
                    I am using the voxl-fpv-dev version of px4

                    Alex KushleyevA Offline
                    Alex KushleyevA Offline
                    Alex Kushleyev
                    ModalAI Team
                    wrote on last edited by
                    #14

                    @Jetson-Nano , what do you mean voxl-fpv-dev version of px4? can you provide the link to the exact release?

                    Jetson NanoJ 1 Reply Last reply
                    0
                    • Alex KushleyevA Alex Kushleyev

                      @Jetson-Nano , what do you mean voxl-fpv-dev version of px4? can you provide the link to the exact release?

                      Jetson NanoJ Offline
                      Jetson NanoJ Offline
                      Jetson Nano
                      Veteran
                      wrote on last edited by
                      #15

                      @Alex-Kushleyev
                      https://github.com/modalai/px4-firmware/tree/voxl-fpv-dev

                      1 Reply Last reply
                      0
                      • Alex KushleyevA Alex Kushleyev

                        @Jetson-Nano , if the voxl_esc driver is started by PX4 running on the Flight Core, it should print out debugging information to the UART console. The log below was taken from PX4 running on VOXL2 DSP, but the output should be the same when using Flight Core V2.

                        Please also note that the Flight Core (V2), when powered up, starts immediately (as opposed to VOXL2 booting takes a few seconds), so FC V2 will try to detect the ESC before the ESC exits bootloader (which takes 1 second after power is applied) and will fail to detect the ESC. This was fixed in our FC V2 drone config, please check your voxl-esc driver behavior. Here is the commit that added the delay of 1.5 seconds before starting voxl esc driver on FC V2:

                        • https://github.com/modalai/px4-firmware/pull/70/commits/55742d298bf9241a2af5aa2c7ba3a26788073356
                        • https://github.com/modalai/px4-firmware/pull/70/commits/1c11e2e0ac3fcc19cb45ab59292b3cf5f4fdb348

                        (voxl-esc driver log from VOXL2 DSP is below)

                        INFO  [muorb] SLPI: VOXL_ESC: Starting VOXL ESC driver
                        INFO  [muorb] SLPI: VOXL_ESC: Opening UART ESC device 2, baud rate 2000000
                        INFO  [muorb] SLPI: VOXL_ESC: Successfully opened UART ESC device
                        INFO  [muorb] SLPI: VOXL_ESC: Detecting ESCs...
                        INFO  [muorb] SLPI: VOXL_ESC: 	ESC ID     : 0
                        INFO  [muorb] SLPI: VOXL_ESC: 	Board Type : 37: ModalAi 4-in-1 ESC (M0134-1)
                        INFO  [muorb] SLPI: VOXL_ESC: 	Unique ID  : 0x203330385246571900480024
                        INFO  [muorb] SLPI: VOXL_ESC: 	Firmware   : version   39, hash eb6fb500
                        INFO  [muorb] SLPI: VOXL_ESC: 	Bootloader : version  183, hash b4fa2cf8
                        INFO  [muorb] SLPI: VOXL_ESC: 	Reply time : 1646us
                        INFO  [muorb] SLPI: VOXL_ESC:
                        INFO  [muorb] SLPI: VOXL_ESC: 	ESC ID     : 1
                        INFO  [muorb] SLPI: VOXL_ESC: 	Board Type : 37: ModalAi 4-in-1 ESC (M0134-1)
                        INFO  [muorb] SLPI: VOXL_ESC: 	Unique ID  : 0x2033303852465719004D004D
                        INFO  [muorb] SLPI: VOXL_ESC: 	Firmware   : version   39, hash eb6fb500
                        INFO  [muorb] SLPI: VOXL_ESC: 	Bootloader : version  183, hash b4fa2cf8
                        INFO  [muorb] SLPI: VOXL_ESC: 	Reply time : 621us
                        INFO  [muorb] SLPI: VOXL_ESC:
                        INFO  [muorb] SLPI: VOXL_ESC: 	ESC ID     : 2
                        INFO  [muorb] SLPI: VOXL_ESC: 	Board Type : 37: ModalAi 4-in-1 ESC (M0134-1)
                        INFO  [muorb] SLPI: VOXL_ESC: 	Unique ID  : 0x203330385246571900500042
                        INFO  [muorb] SLPI: VOXL_ESC: 	Firmware   : version   39, hash eb6fb500
                        INFO  [muorb] SLPI: VOXL_ESC: 	Bootloader : versiINFO  [qshell] Send cmd: 'voxl_esc start'
                        INFO  [muorb] SLPI: VOXL_ESC: 	Reply time : 1120us
                        INFO  [muorb] SLPI: VOXL_ESC:
                        INFO  [muorb] SLPI: VOXL_ESC: 	ESC ID     : 3
                        INFO  [muorb] SLPI: VOXL_ESC: 	Board Type : 37: ModalAi 4-in-1 ESC (M0134-1)
                        INFO  [muorb] SLPI: VOXL_ESC: 	Unique ID  : 0x2033303852465719004D0050
                        INFO  [muorb] SLPI: VOXL_ESC: 	Firmware   : version   39, hash eb6fb500
                        INFO  [muorb] SLPI: VOXL_ESC: 	Bootloader : version  183, hash b4fa2cf8
                        INFO  [muorb] SLPI: VOXL_ESC: 	Reply time : 617us
                        INFO  [muorb] SLPI: VOXL_ESC:
                        INFO  [muorb] SLPI: VOXL_ESC: Use extened rpm packet : 1
                        INFO  [muorb] SLPI: VOXL_ESC: All ESCs successfully detected
                        
                        Jetson NanoJ Offline
                        Jetson NanoJ Offline
                        Jetson Nano
                        Veteran
                        wrote on last edited by Jetson Nano
                        #16

                        @Alex-Kushleyev here you had mentioned a version where the change has been made with respect to the delay.
                        https://forum.modalai.com/post/21951

                        Alex KushleyevA 1 Reply Last reply
                        0
                        • Jetson NanoJ Jetson Nano

                          @Alex-Kushleyev here you had mentioned a version where the change has been made with respect to the delay.
                          https://forum.modalai.com/post/21951

                          Alex KushleyevA Offline
                          Alex KushleyevA Offline
                          Alex Kushleyev
                          ModalAI Team
                          wrote on last edited by
                          #17

                          @Jetson-Nano , from your above screen shot from QGC, it seems you are using TELEM2 for MAV0, so that is probably why the port is not able to open. You should probably set MAV_0_CONFIG to Disabled...

                          ERROR [px4_work_queue] wq:ttyS4 not available
                          
                          Jetson NanoJ 1 Reply Last reply
                          0
                          • Alex KushleyevA Alex Kushleyev

                            @Jetson-Nano , from your above screen shot from QGC, it seems you are using TELEM2 for MAV0, so that is probably why the port is not able to open. You should probably set MAV_0_CONFIG to Disabled...

                            ERROR [px4_work_queue] wq:ttyS4 not available
                            
                            Jetson NanoJ Offline
                            Jetson NanoJ Offline
                            Jetson Nano
                            Veteran
                            wrote on last edited by
                            #18

                            @Alex-Kushleyev Thank you for the help . I changed the parameter and now the ESC has been initialised. motor are able to rotate.
                            Also is there any other parameter i should be aware of

                            Alex KushleyevA 1 Reply Last reply
                            0
                            • Jetson NanoJ Jetson Nano

                              @Alex-Kushleyev Thank you for the help . I changed the parameter and now the ESC has been initialised. motor are able to rotate.
                              Also is there any other parameter i should be aware of

                              Alex KushleyevA Offline
                              Alex KushleyevA Offline
                              Alex Kushleyev
                              ModalAI Team
                              wrote on last edited by
                              #19

                              @Jetson-Nano , since you are probably using a custom motor and propeller you should:

                              • first of all, update the ESC firmware to the latest
                              • calibrate the ESC for the motor/propeller and upload params
                              • update min and max rpm params in PX4 because they are used to scale the control output
                              • set the correct motor mapping and direction in px4 params
                              • i also recommend updating the baud rate to at least 921600 (or 1M). We are using 2Mbit for all latest ESC configs now. This reduces latency and ensures that you don't have ESC packet drops (depending on the update rate of your flight control loop)

                              In order to perform the updates and tuning, you will need to use voxl-esc tools. Please see the following page for more info: https://docs.modalai.com/voxl-escs/faq/

                              Alex

                              Jetson NanoJ 1 Reply Last reply
                              0
                              • Alex KushleyevA Alex Kushleyev

                                @Jetson-Nano , since you are probably using a custom motor and propeller you should:

                                • first of all, update the ESC firmware to the latest
                                • calibrate the ESC for the motor/propeller and upload params
                                • update min and max rpm params in PX4 because they are used to scale the control output
                                • set the correct motor mapping and direction in px4 params
                                • i also recommend updating the baud rate to at least 921600 (or 1M). We are using 2Mbit for all latest ESC configs now. This reduces latency and ensures that you don't have ESC packet drops (depending on the update rate of your flight control loop)

                                In order to perform the updates and tuning, you will need to use voxl-esc tools. Please see the following page for more info: https://docs.modalai.com/voxl-escs/faq/

                                Alex

                                Jetson NanoJ Offline
                                Jetson NanoJ Offline
                                Jetson Nano
                                Veteran
                                wrote on last edited by
                                #20

                                @Alex-Kushleyev Thank you for the support. I will make the changes you have mentioned.

                                Jetson NanoJ 1 Reply Last reply
                                0
                                • Jetson NanoJ Jetson Nano

                                  @Alex-Kushleyev Thank you for the support. I will make the changes you have mentioned.

                                  Jetson NanoJ Offline
                                  Jetson NanoJ Offline
                                  Jetson Nano
                                  Veteran
                                  wrote on last edited by Jetson Nano
                                  #21

                                  hey @Alex-Kushleyev
                                  I am facing the same issue again, the ESC is not initialising when connected through fc v2 , i have followed all the suggestions you mentioned earlier. the FC as well as VOXL 2 is powered through ESC.

                                  nsh> voxl_esc start
                                  INFO  [voxl_esc] VOXL_ESC: Starting VOXL ESC driver
                                  INFO  [voxl_esc] Params: VOXL_ESC_CONFIG: 1
                                  INFO  [voxl_esc] Params: VOXL_ESC_MODE: 0
                                  INFO  [voxl_esc] Params: VOXL_ESC_BAUD: 2000000
                                  INFO  [voxl_esc] Params: VOXL_ESC_FUNC1: 101
                                  INFO  [voxl_esc] Params: VOXL_ESC_FUNC2: 104
                                  INFO  [voxl_esc] Params: VOXL_ESC_FUNC3: 102
                                  INFO  [voxl_esc] Params: VOXL_ESC_FUNC4: 103
                                  INFO  [voxl_esc] Params: VOXL_ESC_SDIR1: 0
                                  INFO  [voxl_esc] Params: VOXL_ESC_SDIR2: 0
                                  INFO  [voxl_esc] Params: VOXL_ESC_SDIR3: 0
                                  INFO  [voxl_esc] Params: VOXL_ESC_SDIR4: 0
                                  INFO  [voxl_esc] Params: VOXL_ESC_RPM_MIN: 5500
                                  INFO  [voxl_esc] Params: VOXL_ESC_RPM_MAX: 15000
                                  INFO  [voxl_esc] Params: VOXL_ESC_T_PERC: 90
                                  INFO  [voxl_esc] Params: VOXL_ESC_T_DEAD: 20
                                  INFO  [voxl_esc] Params: VOXL_ESC_T_EXPO: 35
                                  INFO  [voxl_esc] Params: VOXL_ESC_T_MINF: 0.150000
                                  INFO  [voxl_esc] Params: VOXL_ESC_T_COSP: 0.990000
                                  INFO  [voxl_esc] Params: VOXL_ESC_VLOG: 0
                                  INFO  [voxl_esc] Params: VOXL_ESC_PUB_BST: 1
                                  INFO  [voxl_esc] Params: VOXL_ESC_T_WARN: 0
                                  INFO  [voxl_esc] Params: VOXL_ESC_T_OVER: 0
                                  INFO  [voxl_esc] Params: GPIO_CTL_CH: 0
                                  nsh> voxl_esc status
                                  INFO  [voxl_esc] not running
                                  nsh> voxl_esc start
                                  INFO  [voxl_esc] VOXL_ESC: Starting VOXL ESC driver
                                  INFO  [voxl_esc] Params: VOXL_ESC_CONFIG: 1
                                  INFO  [voxl_esc] Params: VOXL_ESC_MODE: 0
                                  INFO  [voxl_esc] Params: VOXL_ESC_BAUD: 2000000
                                  INFO  [voxl_esc] Params: VOXL_ESC_FUNC1: 101
                                  INFO  [voxl_esc] Params: VOXL_ESC_FUNC2: 104
                                  INFO  [voxl_esc] Params: VOXL_ESC_FUNC3: 102
                                  INFO  [voxl_esc] Params: VOXL_ESC_FUNC4: 103
                                  INFO  [voxl_esc] Params: VOXL_ESC_SDIR1: 0
                                  INFO  [voxl_esc] Params: VOXL_ESC_SDIR2: 0
                                  INFO  [voxl_esc] Params: VOXL_ESC_SDIR3: 0
                                  INFO  [voxl_esc] Params: VOXL_ESC_SDIR4: 0
                                  INFO  [voxl_esc] Params: VOXL_ESC_RPM_MIN: 5500
                                  INFO  [voxl_esc] Params: VOXL_ESC_RPM_MAX: 15000
                                  INFO  [voxl_esc] Params: VOXL_ESC_T_PERC: 90
                                  INFO  [voxl_esc] Params: VOXL_ESC_T_DEAD: 20
                                  INFO  [voxl_esc] Params: VOXL_ESC_T_EXPO: 35
                                  INFO  [voxl_esc] Params: VOXL_ESC_T_MINF: 0.150000
                                  INFO  [voxl_esc] Params: VOXL_ESC_T_COSP: 0.990000
                                  INFO  [voxl_esc] Params: VOXL_ESC_VLOG: 0
                                  INFO  [voxl_esc] Params: VOXL_ESC_PUB_BST: 1
                                  INFO  [voxl_esc] Params: VOXL_ESC_T_WARN: 0
                                  INFO  [voxl_esc] Params: VOXL_ESC_T_OVER: 0
                                  INFO  [voxl_esc] Params: GPIO_CTL_CH: 0
                                  nsh> 
                                  
                                  Alex KushleyevA 1 Reply Last reply
                                  0
                                  • Jetson NanoJ Jetson Nano

                                    hey @Alex-Kushleyev
                                    I am facing the same issue again, the ESC is not initialising when connected through fc v2 , i have followed all the suggestions you mentioned earlier. the FC as well as VOXL 2 is powered through ESC.

                                    nsh> voxl_esc start
                                    INFO  [voxl_esc] VOXL_ESC: Starting VOXL ESC driver
                                    INFO  [voxl_esc] Params: VOXL_ESC_CONFIG: 1
                                    INFO  [voxl_esc] Params: VOXL_ESC_MODE: 0
                                    INFO  [voxl_esc] Params: VOXL_ESC_BAUD: 2000000
                                    INFO  [voxl_esc] Params: VOXL_ESC_FUNC1: 101
                                    INFO  [voxl_esc] Params: VOXL_ESC_FUNC2: 104
                                    INFO  [voxl_esc] Params: VOXL_ESC_FUNC3: 102
                                    INFO  [voxl_esc] Params: VOXL_ESC_FUNC4: 103
                                    INFO  [voxl_esc] Params: VOXL_ESC_SDIR1: 0
                                    INFO  [voxl_esc] Params: VOXL_ESC_SDIR2: 0
                                    INFO  [voxl_esc] Params: VOXL_ESC_SDIR3: 0
                                    INFO  [voxl_esc] Params: VOXL_ESC_SDIR4: 0
                                    INFO  [voxl_esc] Params: VOXL_ESC_RPM_MIN: 5500
                                    INFO  [voxl_esc] Params: VOXL_ESC_RPM_MAX: 15000
                                    INFO  [voxl_esc] Params: VOXL_ESC_T_PERC: 90
                                    INFO  [voxl_esc] Params: VOXL_ESC_T_DEAD: 20
                                    INFO  [voxl_esc] Params: VOXL_ESC_T_EXPO: 35
                                    INFO  [voxl_esc] Params: VOXL_ESC_T_MINF: 0.150000
                                    INFO  [voxl_esc] Params: VOXL_ESC_T_COSP: 0.990000
                                    INFO  [voxl_esc] Params: VOXL_ESC_VLOG: 0
                                    INFO  [voxl_esc] Params: VOXL_ESC_PUB_BST: 1
                                    INFO  [voxl_esc] Params: VOXL_ESC_T_WARN: 0
                                    INFO  [voxl_esc] Params: VOXL_ESC_T_OVER: 0
                                    INFO  [voxl_esc] Params: GPIO_CTL_CH: 0
                                    nsh> voxl_esc status
                                    INFO  [voxl_esc] not running
                                    nsh> voxl_esc start
                                    INFO  [voxl_esc] VOXL_ESC: Starting VOXL ESC driver
                                    INFO  [voxl_esc] Params: VOXL_ESC_CONFIG: 1
                                    INFO  [voxl_esc] Params: VOXL_ESC_MODE: 0
                                    INFO  [voxl_esc] Params: VOXL_ESC_BAUD: 2000000
                                    INFO  [voxl_esc] Params: VOXL_ESC_FUNC1: 101
                                    INFO  [voxl_esc] Params: VOXL_ESC_FUNC2: 104
                                    INFO  [voxl_esc] Params: VOXL_ESC_FUNC3: 102
                                    INFO  [voxl_esc] Params: VOXL_ESC_FUNC4: 103
                                    INFO  [voxl_esc] Params: VOXL_ESC_SDIR1: 0
                                    INFO  [voxl_esc] Params: VOXL_ESC_SDIR2: 0
                                    INFO  [voxl_esc] Params: VOXL_ESC_SDIR3: 0
                                    INFO  [voxl_esc] Params: VOXL_ESC_SDIR4: 0
                                    INFO  [voxl_esc] Params: VOXL_ESC_RPM_MIN: 5500
                                    INFO  [voxl_esc] Params: VOXL_ESC_RPM_MAX: 15000
                                    INFO  [voxl_esc] Params: VOXL_ESC_T_PERC: 90
                                    INFO  [voxl_esc] Params: VOXL_ESC_T_DEAD: 20
                                    INFO  [voxl_esc] Params: VOXL_ESC_T_EXPO: 35
                                    INFO  [voxl_esc] Params: VOXL_ESC_T_MINF: 0.150000
                                    INFO  [voxl_esc] Params: VOXL_ESC_T_COSP: 0.990000
                                    INFO  [voxl_esc] Params: VOXL_ESC_VLOG: 0
                                    INFO  [voxl_esc] Params: VOXL_ESC_PUB_BST: 1
                                    INFO  [voxl_esc] Params: VOXL_ESC_T_WARN: 0
                                    INFO  [voxl_esc] Params: VOXL_ESC_T_OVER: 0
                                    INFO  [voxl_esc] Params: GPIO_CTL_CH: 0
                                    nsh> 
                                    
                                    Alex KushleyevA Offline
                                    Alex KushleyevA Offline
                                    Alex Kushleyev
                                    ModalAI Team
                                    wrote on last edited by
                                    #22

                                    @Jetson-Nano ,

                                    The primary causes of ESC not being detected by the FC (aside from hardware / wiring issues) is using incorrect UART port or incorrect baud rate. So you should make sure the ESC is running the latest firmware, double check the params that you want to use on the ESC (for your motor / prop) and you can also set the ESC baud rate in the ESC params. You should set up your ESC (using voxl-esc tools) before plugging it into your FC, so that you know exactly what your ESC is set up to do and then you just need to match your PX4 params to what you set in the ESC (baud rate, rpm limits, and use correct UART port).

                                    Alex

                                    Jetson NanoJ 1 Reply Last reply
                                    0
                                    • Alex KushleyevA Alex Kushleyev

                                      @Jetson-Nano ,

                                      The primary causes of ESC not being detected by the FC (aside from hardware / wiring issues) is using incorrect UART port or incorrect baud rate. So you should make sure the ESC is running the latest firmware, double check the params that you want to use on the ESC (for your motor / prop) and you can also set the ESC baud rate in the ESC params. You should set up your ESC (using voxl-esc tools) before plugging it into your FC, so that you know exactly what your ESC is set up to do and then you just need to match your PX4 params to what you set in the ESC (baud rate, rpm limits, and use correct UART port).

                                      Alex

                                      Jetson NanoJ Offline
                                      Jetson NanoJ Offline
                                      Jetson Nano
                                      Veteran
                                      wrote on last edited by
                                      #23

                                      @Alex-Kushleyev Thank you for reverting, I didnt change anything with respect to the fc or ESC, the firmware is the same.
                                      could you help me with understanding why it was working earlier , it is not now.
                                      The firmware of the FC is voxl-fpv-dev version, and when i tried to build again it is giving error, and not building.
                                      I still dont know whether the issue is with respect to FC firmware or ESC

                                      Alex KushleyevA 1 Reply Last reply
                                      0
                                      • Jetson NanoJ Jetson Nano

                                        @Alex-Kushleyev Thank you for reverting, I didnt change anything with respect to the fc or ESC, the firmware is the same.
                                        could you help me with understanding why it was working earlier , it is not now.
                                        The firmware of the FC is voxl-fpv-dev version, and when i tried to build again it is giving error, and not building.
                                        I still dont know whether the issue is with respect to FC firmware or ESC

                                        Alex KushleyevA Offline
                                        Alex KushleyevA Offline
                                        Alex Kushleyev
                                        ModalAI Team
                                        wrote on last edited by
                                        #24

                                        @Jetson-Nano , please confirm the ESC is working by using a usb to serial connection directly to the esc and voxl-esc Python tools on a Linux PC or VM.

                                        You can run simple commands to detect the esc and perform spin tests if needed, this is all documented.

                                        Link Preview Image
                                        VOXL ESC FAQ

                                        ModalAI technical documentation for VOXL and VOXL 2 Companion Computers for PX4 and ArduPilot Obstacle Avoidance and GPS-denied navigation, assembled in the USA

                                        favicon

                                        ModalAI Technical Docs (docs.modalai.com)

                                        If the esc is ok, then you will need to double check the FC v2 setup.

                                        Alex

                                        Jetson NanoJ 1 Reply Last reply
                                        0
                                        • Alex KushleyevA Alex Kushleyev

                                          @Jetson-Nano , please confirm the ESC is working by using a usb to serial connection directly to the esc and voxl-esc Python tools on a Linux PC or VM.

                                          You can run simple commands to detect the esc and perform spin tests if needed, this is all documented.

                                          Link Preview Image
                                          VOXL ESC FAQ

                                          ModalAI technical documentation for VOXL and VOXL 2 Companion Computers for PX4 and ArduPilot Obstacle Avoidance and GPS-denied navigation, assembled in the USA

                                          favicon

                                          ModalAI Technical Docs (docs.modalai.com)

                                          If the esc is ok, then you will need to double check the FC v2 setup.

                                          Alex

                                          Jetson NanoJ Offline
                                          Jetson NanoJ Offline
                                          Jetson Nano
                                          Veteran
                                          wrote on last edited by
                                          #25

                                          Hey @Alex-Kushleyev , for the same setup I mentioned above my esc is not starting by default, while I run voxl_esc start in mavlink console, it starts and works.
                                          what could be the reason for such behaviour. Please could you help me out

                                          Alex KushleyevA 1 Reply Last reply
                                          0

                                          Hello! It looks like you're interested in this conversation, but you don't have an account yet.

                                          Getting fed up of having to scroll through the same posts each visit? When you register for an account, you'll always come back to exactly where you were before, and choose to be notified of new replies (either via email, or push notification). You'll also be able to save bookmarks and upvote posts to show your appreciation to other community members.

                                          With your input, this post could be even better 💗

                                          Register Login
                                          Reply
                                          • Reply as topic
                                          Log in to reply
                                          • Oldest to Newest
                                          • Newest to Oldest
                                          • Most Votes


                                          ModalAI
                                          Categories Recent Tags ModalAI.com Docs
                                          © 2026 ModalAI® · Accelerating autonomy for smaller, smarter, safer drones · Powered by NodeBB
                                          • Login

                                          • Don't have an account? Register

                                          • Login or register to search.
                                          • First post
                                            Last post
                                          0
                                          • Categories
                                          • Recent
                                          • Tags
                                          • Popular
                                          • Users
                                          • Groups