adb is not working after tflite deployment.

[bgaudel]

@tom thanks for the reply and sorry for the confusion but I think we have an RB5 drone; we used sw3 on the 5G add-on and enabled the fast boot to install the system image with VOXL SDK 0.9.5 as per instructions in this link. We get the following warning [INFO] {system::0xC2F5D7000} partition returned size {0xD3B5D7000}, expected {0xC2F5D7000} in the first process. I was wondering if it is safe to proceed with this instruction:

Image Version:     1.4.1
[INFO] Found fastboot device
[WARNING] This system image flash is intended only for the following
          platform: RB5 Flight (m0052) 

          Make sure that the device that will be flashed is correct.
          Flashing a device with an incorrect system image will lead
          the device to be stuck in fastboot.

Would you like to continue with the RB5 Flight (m0052) system image flash?
1) Yes
2) No
#? 1
[INFO] {system::0xC2F5D7000} partition returned size {0xD3B5D7000}, expected {0xC2F5D7000}
[WARNING] Partition layout was found to be incorrect, this requires
          flashing the full partition table. Flashing the partition
          table will also flash every partition causing all data on
          the device to be lost.

When doing a full flash, make sure to backup any important files

Would you like to continue with the full wipe/flash now?
1) Yes
2) No
#? 

thank you

[tom]

@bgaudel Yep, that shouldn't be an issue

[bgaudel]

@tom Thank you so much. After reflashing the drone and enabling the required services, we attempted to establish a connection with the QGC. However, we encountered an issue as the connection could not be established.

These are the activated services in our drone.

we used voxl-configure-vision-px4 to connect drone with QGC

How we can establish the connection between QGC and Drone?

[tom]

@bgaudel Are you able to ping the drone from the ground station and vice-versa?

[bgaudel]

@tom Yes I am able to ping the drone from GS and vice versa shown in the image below.

This one is ping my PC from drone:

This is ping drone from my PC (my qgc):

mypc@mypc:~/mypc$ ping 172.16.0.143
PING 172.16.0.143 (172.16.0.143) 56(84) bytes of data.
64 bytes from 172.16.0.143: icmp_seq=1 ttl=64 time=27.0 ms
64 bytes from 172.16.0.143: icmp_seq=2 ttl=64 time=50.9 ms
64 bytes from 172.16.0.143: icmp_seq=3 ttl=64 time=71.3 ms
64 bytes from 172.16.0.143: icmp_seq=4 ttl=64 time=94.7 ms
64 bytes from 172.16.0.143: icmp_seq=5 ttl=64 time=118 ms
^C
--- 172.16.0.143 ping statistics ---
5 packets transmitted, 5 received, 0% packet loss, time 4005ms
rtt min/avg/max/mdev = 27.039/72.410/118.097/31.966 ms

[tom]

@bgaudel Have you been able to connect to QGC on this PC in the past? I'm wondering if there is some firewall preventing the traffic

[bgaudel]

@tom Indeed, I have previously utilized the same computer without any issues, and the connection was established successfully. It is perplexing since I have not implemented any firewall restrictions on the PC. I am uncertain about the underlying cause of this connectivity problem.

[tom]

@bgaudel Does QGC have auto-connect over UDP enabled?

[bgaudel]

@tom Yes, the QGC has auto-connect over UDP enabled.

we see the status of voxl-px4 as well,

rb5:~$ systemctl status voxl-px4
● voxl-px4.service - px4
   Loaded: loaded (/etc/systemd/system/voxl-px4.service; enabled; vendor preset: enabled)
   Active: active (running) since Tue 2022-09-06 03:18:14 UTC; 11min ago
 Main PID: 2892 (voxl-px4)
    Tasks: 26 (limit: 4915)
   CGroup: /system.slice/voxl-px4.service
           ├─2892 /bin/bash /usr/bin/voxl-px4 -d
           └─2904 px4 -d -s /etc/modalai/voxl-px4.config

Sep 06 03:26:44 m0052 bash[2892]: INFO  [PreFlightCheck] Failed EKF sensor bias preflight check
Sep 06 03:26:44 m0052 bash[2892]: ERROR [muorb] SLPI: MAG #0 failed:  TIMEOUT!
Sep 06 03:26:44 m0052 bash[2892]: INFO  [PreFlightCheck] Failed EKF sensor bias preflight check
Sep 06 03:26:44 m0052 bash[2892]: ERROR [muorb] SLPI: MAG #0 failed:  TIMEOUT!
Sep 06 03:26:44 m0052 bash[2892]: INFO  [PreFlightCheck] Failed EKF sensor bias preflight check
Sep 06 03:26:44 m0052 bash[2892]: INFO  [PreFlightCheck] Failed EKF sensor bias preflight check
Sep 06 03:26:44 m0052 bash[2892]: ERROR [muorb] SLPI: MAG #0 failed:  TIMEOUT!
Sep 06 03:26:44 m0052 bash[2892]: INFO  [PreFlightCheck] Failed EKF sensor bias preflight check
Sep 06 03:26:44 m0052 bash[2892]: ERROR [muorb] SLPI: MAG #0 failed:  TIMEOUT!
Sep 06 03:26:44 m0052 bash[2892]: ERROR [muorb] SLPI: MAG #0 failed:  TIMEOUT!

==================
the output of debugging the communication link as per https://docs.modalai.com/voxl-vision-px4-telemetry/

rb5:/$ voxl-vision-px4 --debug_udp_recv
Enabling UDP recv debugging
loading our own config file
=================================================================
Parameters as loaded from config file:
config_file_version:        1
MAVLINK IO
qgc_ip:                     NULL
en_secondary_qgc:           0
secondary_qgc_ip:           NULL
qgc_udp_port_number:        14550
udp_mtu:                    512
en_localhost_mavlink_udp    1
localhost_udp_port_number:  14551
VIO
en_vio:                     1
vio_pipe:                   qvio
en_send_vio_to_qgc:         0
en_reset_vio_if_initialized_inverted: 1
vio_warmup_s:               3.000000
send_odom_while_failed:     0
MISC FEATURES
horizon_cal_tolerance:      0.500000
OFFBOARD MODE
offboard_mode:              off
follow_tag_id:              0
figure_eight_move_home:     1
robot_radius:               0.300000
collision_sampling_dt:      0.100000
max_lookahead_distance:     1.000000
FIXED FRAME RELOCALIZATION
en_tag_fixed_frame:         0
fixed_frame_filter_len:     5
en_transform_mavlink_pos_setpoints_from_fixed_frame:0
COLLISION PREVENTION (VOA)
en_voa:                     1
en_send_voa_to_qgc:         0
voa_upper_bound_m:          -0.150000
voa_lower_bound_m:          0.150000
voa_memory_s:               1.000000
voa_input #0
    enabled:            1
    type:               point_cloud
    input_pipe:         dfs_point_cloud
    frame:              stereo_l
voa_input #1
    enabled:            1
    type:               point_cloud
    input_pipe:         stereo_front_pc
    frame:              stereo_front_l
voa_input #2
    enabled:            1
    type:               point_cloud
    input_pipe:         stereo_rear_pc
    frame:              stereo_rear_l
voa_input #3
    enabled:            1
    type:               tof
    input_pipe:         tof
    frame:              tof
voa_input #4
    enabled:            1
    type:               rangefinder
    input_pipe:         rangefinders
    frame:              body
=================================================================
loading extrinsics config file
loading horizon cal file
existing instance of voxl-vision-px4 found, attempting to stop it
starting geometry module
starting px4 monitor
starting px4 mavlink
Waiting to connect to voxl-mavlink-server
Connected to voxl-mavlink-server
starting udp mavlink
Adding manual QGC IP address to udp connection list: NULL
WARNING: invalid qgc_ip, this is fine if you don't want to use it
starting fixed pose input
starting vio manager
Connected to VIO pipe: qvio
updating to use imu: imu_px4
done updating transforms to use imu: imu_px4
starting tag manager
starting voa manager
Connected to voxl-tag-detector
Connected to pipe: stereo_front_pc
Connected to pipe: stereo_rear_pc
starting horizon cal module
Init complete
WARNING: connected to voxl-mavlink-server but no messages from PX4
UDP recv msg ID:   0 sysid:255 from port: 14550 IP: 172.16.0.203 
Added new UDP connection to 172.16.0.203
UDP recv msg ID:   0 sysid:255 from port: 14550 IP: 172.16.0.203 
UDP recv msg ID:   0 sysid:255 from port: 14550 IP: 172.16.0.203 
UDP recv msg ID:   0 sysid:255 from port: 14550 IP: 172.16.0.203 
UDP recv msg ID:   0 sysid:255 from port: 14550 IP: 172.16.0.203 
UDP recv msg ID:   0 sysid:255 from port: 14550 IP: 172.16.0.203 
UDP recv msg ID:   0 sysid:255 from port: 14550 IP: 172.16.0.203 
UDP recv msg ID:   0 sysid:255 from port: 14550 IP: 172.16.0.203 
UDP recv msg ID:   0 sysid:255 from port: 14550 IP: 172.16.0.203 
UDP recv msg ID:   0 sysid:255 from port: 14550 IP: 172.16.0.203 

Is there any specific configuration or installation that we need to do for px4 or QGC after installing the VOXL SDK image on a rb5 drone?

[tom]

@bgaudel What does your voxl-vision-px4 config file look like? cat /etc/modalai/voxl-vision-px4.conf?

I'm seeing qgc_ip: NULL, which may be the issue

[bgaudel]

@tom we tried different settings. The following is the IP setup that we have on the LAN network using a router. "qgc_ip": "172.16.0.203", is my computer IP, and the drone IP is 172.16.0.75". Also, the ping test works back and forth.

rb5:/$ cat /etc/modalai/voxl-vision-px4.conf        
/**
 * VOXL Vision PX4 Configuration File
 *
 * version: don't touch this, used to keep track of changing config file formats
 *
 * ##############################################################################
 * ## Networking
 * ##############################################################################
 *
 * qgc_ip:
 *         Manually inform voxl-vision-px4 of the IP address of your QGC Ground
 *         Controller by providing the IP address of your ground station computer
 *         in the “qgc_ip” field of the config file. This field is also configured
 *         as one of the first questions in the configuration wizard.
 *         If you wish to rely on QGC to initiate the connection to VOXL you can
 *         leave this field as-is, blank, or “NULL”. Mavlink data is sent to this
 *         IP on port 14550 by default, but this can be changed with the
 *         qgc_udp_port_number config value.
 *
 * en_secondary_qgc:
 *         Enable manually setting a second QGC ground station IP address.
 *
 * secondary_qgc_ip:
 *         IP address for optional second QGC connection. Note that many more mavlink
 *         connections can be made as long as they are initialized by the other device.
 *
 * qgc_udp_port_number:
 *         Port to use for manual and automatic QGC connections, default 14550
 *
 * udp_mtu:
 *         Max size of UDP packet to send to QGC. Multiple mavlink messages will be
 *         combined into one UDP packet to reduce network traffic. Set this to 0 to
 *         send one UDP packet for every mavlink message. Default is 512 which
 *         allows several mavlink messages per UDP packet.
 *
 * en_localhost_mavlink_udp:
 *         If you are running MAVROS/MAVSDK onboard VOXL and wish to open access to
 *         PX4 through a localhost UDP port simply ensure the follow feature is
 *         enabled. This is set to true by default. This will allow one local process
 *         to communicate with PX4 via port 14551 by default, NOT 14550 which is
 *         reserved for connections outside the board. These separation prevents
 *         conflicts between the two sockets. Both MAVROS and MAVSDK can be
 *         configured to use this port.
 *
 * localhost_udp_port_number:
 *         Port number for localhost UDP socket, default 14551
 *
 * ##############################################################################
 * ## VIO
 * ##############################################################################
 *
 * en_vio:
 *         Enable processing of VIO data from MPA to be sent to PX4 as mavlink
 *         odometry messages. Enabled by default.
 *
 * vio_pipe:
 *         Which pipe to subscribe to VIO data. Must be a standard libmodal-pipe
 *         vio_data_t type. Default is qvio
 *
 * en_send_vio_to_qgc:
 *         Enable sending of VIO odometry messages to QGC for debug.
 *         Note PX4 also sends odometry messages to QGC, so look for
 *         the messages in mavlink-inspector marked as from component 197
 *
 * en_reset_vio_if_initialized_inverted:
 *         For VIO algorithms like qVIO that can initialize in any orientation
 *         and output their estimate of the gravity vector, we suggest leaving
 *         this enabled to allow vvpx4 to automatically send the reset signal
 *         back to the VIO pipe if VIO was initialized upside-down or sufficiently
 *         off-level. Helpful if the user powers on a drone while carrying it to
 *         the flight area and VIO starts too early.
 *
 * vio_warmup_s:
 *         Wait this for this amount of time of having good VIO data before
 *         actually starting to send to PX4. This helps stop EKF2 getting
 *         confused if VIO flickers in and out while struggling to init.
 *         Set to 0 to disable the feature.
 *
 * send_odom_while_failed:
 *         Off by default. Reserved for the future when PX4 supports quality field
 *
 * ##############################################################################
 * ## APQ8096-only Features
 * ##############################################################################
 *
 * en_set_clock_from_gps:
 *         Enable setting the VOXL system time to GPS time if no NTP server can be
 *         reached via network to set the time.
 *
 * en_force_onboard_mav1_mode:
 *         Force PX4 to use onboard mode for mavlink 1 channel which is the channel
 *         apq8096 (VOXL1) uses to communicate UART Mavlink with PX4. Not applicable
 *         to qrb5165-based platforms. Sets the MAV1_MODE PX4 param.
 *
 * en_reset_px4_on_error:
 *         Trigger a reboot of PX4 one some of PX4's unrecoverable errors,
 *         Not applicable to qrb5165
 *         Yaw estimate error & High Accelerometer Bias and both detected
 *
 * ##############################################################################
 * ## Misc Features
 * ##############################################################################
 *
 * horizon_cal_tolerance:
 *         Allowable standard deviation in roll/pitch values to consider the drone
 *         stable enough in flight to do a PX4 horizon calibration. Default is 0.45,
 *         you can increase this slightly if flying in a small indoor area or with
 *         a drone that does not hold still very well.
 *         See https://docs.modalai.com/calibrate-px4-horizon/
 *
 * ##############################################################################
 * ## offboard mode config
 * ##############################################################################
 *
 * offboard_mode: The following are valid strings
 *     off: VVPX4 will not send any offboard commands to PX4
 *     figure_eight: Default value, VVPX4 commands PX4 to fly a figure 8 path
 *     follow_tag: Drone will follow an apriltag around. Very dangerous, not
 *                 recommended for customer use, for ModalAI R&D only.
 *     trajectory: VVPX4 receives polynomial trajectories by pipe and commands
 *                 PX4 to follow the trajectory path. Still in development.
 *
 * follow_tag_id:
 *         Apriltag ID to follow in follow_tag mode
 *
 * figure_eight_move_home:
 *         Enable by default, resets the center of the figure 8 path to wherever
 *         the drone is when flipped into offboard mode. When disabled, the drone
 *         will quickly fly back to the XYZ point 0,0,-1.5 in VIO frame before
 *         starting the figure 8. Disabling this feature can be dangerous if VIO
 *         has drifted significantly.
 *
 * robot_radius:
 *         Robot radius to use when checking collisions within the trajectory monitor.
 * 		   The trajectory monitor is only active when in trajectory mode
 *
 * collision_sampling_dt:
 *         The time step to sample along the polynomials by when checking for collisions
 * 		   in the collision monitor.
 *
 * max_lookahead_distance:
 *         Maximum distance to look along the trajectory. Sensor data further out can be
 * 		   unrealiable so keeping this value small reduces false positives
 *
 * ##############################################################################
 * ## Fixed Frame Tag Relocalization
 * ##############################################################################
 *
 * en_tag_fixed_frame:
 *         Enable fixed frame relocalization via voa_inputs.
 *         See: https://docs.modalai.com/voxl-vision-px4-apriltag-relocalization/
 *
 * fixed_frame_filter_len:
 *         Length of the moving average filter to use for smooth relocalization
 *         when a tag is detected. Default is 5, a longer filter will result in
 *         smoother behavior when a new tag comes into view. Set to 1 to do no
 *         filtering at all and assume every tag detection is accurate.
 *
 * en_transform_mavlink_pos_setpoints_from_fixed_frame:
 *         When enabled, mavlink position_target_local_ned_t commands received on
 *         via UDP will be assumed to be in fixed frame and are then transformed
 *         to local frame before being sent to PX4. This allows offboard mode
 *         position commands from MAVROS/MAVSDK to be in fixed frame relative to
 *         voa_inputs even though PX4/EKF2 operates in local frame relative to where
 *         VIO initialized.
 *
 * ##############################################################################
 * ## Collision Prevention (VOA)
 * ## Settings for configuring data sent to PX4 for Collision Prevention
 * ##############################################################################
 *
 * en_voa:
 *         Enable processing of DFS and TOF data to be sent to PX4 as mavlink
 *         obstacle_distance messages for collision prevention in position mode.
 *
 * en_send_voa_to_qgc:
 *         Enable sending of VOA obstacle_distance messages to QGC for debug.
 *
 * voa_lower_bound_m & voa_upper_bound_m:
 *         VOA ignores obstacles above and below the upper and lower bounds.
 *         Remember, Z points downwards in body and NED frames, so the lower bound
 *         is a positive number, and the upper bound is a negative number.
 *         Defaults are lower: 0.15  upper: -0.15 Units are in meters.
 *
 * voa_memory_s:
 *         number of seconds to keep track of sensor readings for VOA
 *         default: 1.0
 *
 * voa_inputs:
 *         Array of pipes to subscribe to for use with VOA, up to 10 supported
 *         Each entry has 4 fields:
 *
 *         enabled: true or false, it's safe to leave this enabled when the pipe is missing
 *         type: can be point_cloud, tof, or rangefinder
 *         input_pipe: pipe name, e.g. stereo_front_pc, rangefinders, tof, etc
 *         frame: frame of reference, should be listed in /etc/modalai/extrinsics/conf
 *
 */
{
	"config_file_version":	1,
	"qgc_ip":	"172.16.0.203",
	"en_secondary_qgc":	false,
	"secondary_qgc_ip":	"192.168.1.214",
	"qgc_udp_port_number":	14550,
	"udp_mtu":	512,
	"en_localhost_mavlink_udp":	true,
	"localhost_udp_port_number":	14551,
	"vio_pipe":	"qvio",
	"en_vio":	true,
	"en_send_vio_to_qgc":	false,
	"en_reset_vio_if_initialized_inverted":	true,
	"vio_warmup_s":	3,
	"send_odom_while_failed":	false,
	"horizon_cal_tolerance":	0.5,
	"offboard_mode":	"off",
	"follow_tag_id":	0,
	"figure_eight_move_home":	true,
	"robot_radius":	0.300000011920929,
	"collision_sampling_dt":	0.1,
	"max_lookahead_distance":	1,
	"en_tag_fixed_frame":	false,
	"fixed_frame_filter_len":	5,
	"en_transform_mavlink_pos_setpoints_from_fixed_frame":	false,
	"en_voa":	true,
	"en_send_voa_to_qgc":	false,
	"voa_upper_bound_m":	-0.15000000596046448,
	"voa_lower_bound_m":	0.15000000596046448,
	"voa_memory_s":	1,
	"voa_inputs":	[{
			"enabled":	true,
			"type":	"point_cloud",
			"input_pipe":	"dfs_point_cloud",
			"frame":	"stereo_l"
		}, {
			"enabled":	true,
			"type":	"point_cloud",
			"input_pipe":	"stereo_front_pc",
			"frame":	"stereo_front_l"
		}, {
			"enabled":	true,
			"type":	"point_cloud",
			"input_pipe":	"stereo_rear_pc",
			"frame":	"stereo_rear_l"
		}, {
			"enabled":	true,
			"type":	"tof",
			"input_pipe":	"tof",
			"frame":	"tof"
		}, {
			"enabled":	true,
			"type":	"rangefinder",
			"input_pipe":	"rangefinders",
			"frame":	"body"
		}]
}

[tom]

@bgaudel After modifying the conf file, are you restarting voxl-vision-px4 with systemctl restart voxl-vision-px4?

[bgaudel]

@tom yes we did systemctl restart voxl-vision-px4 after modifying the config file.

The setting of our QGC is:

.

Still not able to connect with QGC. We also tried the same thing on the two different PC. Are there any settings or configurations that we especially need to take care of?

[tom]

@bgaudel It seems as though you have all the configs setup correctly, can you post the status of the following services:

systemctl status voxl-px4
systemctl status voxl-vision-px4
systemctl status voxl-mavlink-server

[bijay gaudel]

@tom Here are the outputs of the above commands:

[tom]

@bijay-gaudel How about:

journalctl -u voxl-px4
journalctl -u voxl-vision-px4
journalctl -u voxl-mavlink-server

[bijay gaudel]

@tom

[tom]

@bijay-gaudel Let's reset all of the services to their default / working state for RB5, can you run the following:

# configure services to defaults
voxl-configure-mpa -f rb5-flight

# modify /etc/modalai/voxl-vision-px4 with your correct qgc_ip
vi  /etc/modalai/voxl-vision-px4

# reboot rb5
adb reboot

The services seem to be having issue in this current state based off of the WARNING

[bijay gaudel]

This post is deleted!

[bgaudel]

@tom /etc/modalai/voxl-vision-px4 file seems empty.

but /etc/modalai/voxl-vision-px4.config have data as:

rb5:/$ cat /etc/modalai/voxl-vision-px4.conf
/**
 * VOXL Vision PX4 Configuration File
 *
 * version: don't touch this, used to keep track of changing config file formats
 *
 * ##############################################################################
 * ## Networking
 * ##############################################################################
 *
 * qgc_ip:
 *         Manually inform voxl-vision-px4 of the IP address of your QGC Ground
 *         Controller by providing the IP address of your ground station computer
 *         in the “qgc_ip” field of the config file. This field is also configured
 *         as one of the first questions in the configuration wizard.
 *         If you wish to rely on QGC to initiate the connection to VOXL you can
 *         leave this field as-is, blank, or “NULL”. Mavlink data is sent to this
 *         IP on port 14550 by default, but this can be changed with the
 *         qgc_udp_port_number config value.
 *
 * en_secondary_qgc:
 *         Enable manually setting a second QGC ground station IP address.
 *
 * secondary_qgc_ip:
 *         IP address for optional second QGC connection. Note that many more mavlink
 *         connections can be made as long as they are initialized by the other device.
 *
 * qgc_udp_port_number:
 *         Port to use for manual and automatic QGC connections, default 14550
 *
 * udp_mtu:
 *         Max size of UDP packet to send to QGC. Multiple mavlink messages will be
 *         combined into one UDP packet to reduce network traffic. Set this to 0 to
 *         send one UDP packet for every mavlink message. Default is 512 which
 *         allows several mavlink messages per UDP packet.
 *
 * en_localhost_mavlink_udp:
 *         If you are running MAVROS/MAVSDK onboard VOXL and wish to open access to
 *         PX4 through a localhost UDP port simply ensure the follow feature is
 *         enabled. This is set to true by default. This will allow one local process
 *         to communicate with PX4 via port 14551 by default, NOT 14550 which is
 *         reserved for connections outside the board. These separation prevents
 *         conflicts between the two sockets. Both MAVROS and MAVSDK can be
 *         configured to use this port.
 *
 * localhost_udp_port_number:
 *         Port number for localhost UDP socket, default 14551
 *
 * ##############################################################################
 * ## VIO
 * ##############################################################################
 *
 * en_vio:
 *         Enable processing of VIO data from MPA to be sent to PX4 as mavlink
 *         odometry messages. Enabled by default.
 *
 * vio_pipe:
 *         Which pipe to subscribe to VIO data. Must be a standard libmodal-pipe
 *         vio_data_t type. Default is qvio
 *
 * en_send_vio_to_qgc:
 *         Enable sending of VIO odometry messages to QGC for debug.
 *         Note PX4 also sends odometry messages to QGC, so look for
 *         the messages in mavlink-inspector marked as from component 197
 *
 * en_reset_vio_if_initialized_inverted:
 *         For VIO algorithms like qVIO that can initialize in any orientation
 *         and output their estimate of the gravity vector, we suggest leaving
 *         this enabled to allow vvpx4 to automatically send the reset signal
 *         back to the VIO pipe if VIO was initialized upside-down or sufficiently
 *         off-level. Helpful if the user powers on a drone while carrying it to
 *         the flight area and VIO starts too early.
 *
 * vio_warmup_s:
 *         Wait this for this amount of time of having good VIO data before
 *         actually starting to send to PX4. This helps stop EKF2 getting
 *         confused if VIO flickers in and out while struggling to init.
 *         Set to 0 to disable the feature.
 *
 * send_odom_while_failed:
 *         Off by default. Reserved for the future when PX4 supports quality field
 *
 * ##############################################################################
 * ## APQ8096-only Features
 * ##############################################################################
 *
 * en_set_clock_from_gps:
 *         Enable setting the VOXL system time to GPS time if no NTP server can be
 *         reached via network to set the time.
 *
 * en_force_onboard_mav1_mode:
 *         Force PX4 to use onboard mode for mavlink 1 channel which is the channel
 *         apq8096 (VOXL1) uses to communicate UART Mavlink with PX4. Not applicable
 *         to qrb5165-based platforms. Sets the MAV1_MODE PX4 param.
 *
 * en_reset_px4_on_error:
 *         Trigger a reboot of PX4 one some of PX4's unrecoverable errors,
 *         Not applicable to qrb5165
 *         Yaw estimate error & High Accelerometer Bias and both detected
 *
 * ##############################################################################
 * ## Misc Features
 * ##############################################################################
 *
 * horizon_cal_tolerance:
 *         Allowable standard deviation in roll/pitch values to consider the drone
 *         stable enough in flight to do a PX4 horizon calibration. Default is 0.45,
 *         you can increase this slightly if flying in a small indoor area or with
 *         a drone that does not hold still very well.
 *         See https://docs.modalai.com/calibrate-px4-horizon/
 *
 * ##############################################################################
 * ## offboard mode config
 * ##############################################################################
 *
 * offboard_mode: The following are valid strings
 *     off: VVPX4 will not send any offboard commands to PX4
 *     figure_eight: Default value, VVPX4 commands PX4 to fly a figure 8 path
 *     follow_tag: Drone will follow an apriltag around. Very dangerous, not
 *                 recommended for customer use, for ModalAI R&D only.
 *     trajectory: VVPX4 receives polynomial trajectories by pipe and commands
 *                 PX4 to follow the trajectory path. Still in development.
 *
 * follow_tag_id:
 *         Apriltag ID to follow in follow_tag mode
 *
 * figure_eight_move_home:
 *         Enable by default, resets the center of the figure 8 path to wherever
 *         the drone is when flipped into offboard mode. When disabled, the drone
 *         will quickly fly back to the XYZ point 0,0,-1.5 in VIO frame before
 *         starting the figure 8. Disabling this feature can be dangerous if VIO
 *         has drifted significantly.
 *
 * robot_radius:
 *         Robot radius to use when checking collisions within the trajectory monitor.
 * 		   The trajectory monitor is only active when in trajectory mode
 *
 * collision_sampling_dt:
 *         The time step to sample along the polynomials by when checking for collisions
 * 		   in the collision monitor.
 *
 * max_lookahead_distance:
 *         Maximum distance to look along the trajectory. Sensor data further out can be
 * 		   unrealiable so keeping this value small reduces false positives
 *
 * ##############################################################################
 * ## Fixed Frame Tag Relocalization
 * ##############################################################################
 *
 * en_tag_fixed_frame:
 *         Enable fixed frame relocalization via voa_inputs.
 *         See: https://docs.modalai.com/voxl-vision-px4-apriltag-relocalization/
 *
 * fixed_frame_filter_len:
 *         Length of the moving average filter to use for smooth relocalization
 *         when a tag is detected. Default is 5, a longer filter will result in
 *         smoother behavior when a new tag comes into view. Set to 1 to do no
 *         filtering at all and assume every tag detection is accurate.
 *
 * en_transform_mavlink_pos_setpoints_from_fixed_frame:
 *         When enabled, mavlink position_target_local_ned_t commands received on
 *         via UDP will be assumed to be in fixed frame and are then transformed
 *         to local frame before being sent to PX4. This allows offboard mode
 *         position commands from MAVROS/MAVSDK to be in fixed frame relative to
 *         voa_inputs even though PX4/EKF2 operates in local frame relative to where
 *         VIO initialized.
 *
 * ##############################################################################
 * ## Collision Prevention (VOA)
 * ## Settings for configuring data sent to PX4 for Collision Prevention
 * ##############################################################################
 *
 * en_voa:
 *         Enable processing of DFS and TOF data to be sent to PX4 as mavlink
 *         obstacle_distance messages for collision prevention in position mode.
 *
 * en_send_voa_to_qgc:
 *         Enable sending of VOA obstacle_distance messages to QGC for debug.
 *
 * voa_lower_bound_m & voa_upper_bound_m:
 *         VOA ignores obstacles above and below the upper and lower bounds.
 *         Remember, Z points downwards in body and NED frames, so the lower bound
 *         is a positive number, and the upper bound is a negative number.
 *         Defaults are lower: 0.15  upper: -0.15 Units are in meters.
 *
 * voa_memory_s:
 *         number of seconds to keep track of sensor readings for VOA
 *         default: 1.0
 *
 * voa_inputs:
 *         Array of pipes to subscribe to for use with VOA, up to 10 supported
 *         Each entry has 4 fields:
 *
 *         enabled: true or false, it's safe to leave this enabled when the pipe is missing
 *         type: can be point_cloud, tof, or rangefinder
 *         input_pipe: pipe name, e.g. stereo_front_pc, rangefinders, tof, etc
 *         frame: frame of reference, should be listed in /etc/modalai/extrinsics/conf
 *
 */
{
	"config_file_version":	1,
	"qgc_ip":	"172.16.0.204",
	"en_secondary_qgc":	false,
	"secondary_qgc_ip":	"192.168.1.214",
	"qgc_udp_port_number":	14550,
	"udp_mtu":	512,
	"en_localhost_mavlink_udp":	true,
	"localhost_udp_port_number":	14551,
	"vio_pipe":	"qvio",
	"en_vio":	true,
	"en_send_vio_to_qgc":	false,
	"en_reset_vio_if_initialized_inverted":	true,
	"vio_warmup_s":	3,
	"send_odom_while_failed":	false,
	"horizon_cal_tolerance":	0.5,
	"offboard_mode":	"off",
	"follow_tag_id":	0,
	"figure_eight_move_home":	true,
	"robot_radius":	0.300000011920929,
	"collision_sampling_dt":	0.1,
	"max_lookahead_distance":	1,
	"en_tag_fixed_frame":	false,
	"fixed_frame_filter_len":	5,
/**
 * VOXL Vision PX4 Configuration File
 *
 * version: don't touch this, used to keep track of changing config file formats
 *
 * ##############################################################################
 * ## Networking
 * ##############################################################################
 *
 * qgc_ip:
 *         Manually inform voxl-vision-px4 of the IP address of your QGC Ground
 *         Controller by providing the IP address of your ground station computer
 *         in the �~@~\qgc_ip�~@~] field of the config file. This field is also configured
 *         as one of the first questions in the configuration wizard.
 *         If you wish to rely on QGC to initiate the connection to VOXL you can
 *         leave this field as-is, blank, or �~@~\NULL�~@~]. Mavlink data is sent to this
 *         IP on port 14550 by default, but this can be changed with the
 *         qgc_udp_port_number config value.
 *
 * en_secondary_qgc:
 *         Enable manually setting a second QGC ground station IP address.
 *
 * secondary_qgc_ip:
 *         IP address for optional second QGC connection. Note that many more mavlink
 *         connections can be made as long as they are initialized by the other device.
 *
 * qgc_udp_port_number:
 *         Port to use for manual and automatic QGC connections, default 14550
 *
 * udp_mtu:
 *         Max size of UDP packet to send to QGC. Multiple mavlink messages will be
 *         combined into one UDP packet to reduce network traffic. Set this to 0 to
 *         send one UDP packet for every mavlink message. Default is 512 which
 *         allows several mavlink messages per UDP packet.
 *
 * en_localhost_mavlink_udp:
 *         If you are running MAVROS/MAVSDK onboard VOXL and wish to open access to
 *         PX4 through a localhost UDP port simply ensure the follow feature is
 *         enabled. This is set to true by default. This will allow one local process
 *         to communicate with PX4 via port 14551 by default, NOT 14550 which is
 *         reserved for connections outside the board. These separation prevents
 *         conflicts between the two sockets. Both MAVROS and MAVSDK can be
 *         configured to use this port.
 *
 * localhost_udp_port_number:
 *         Port number for localhost UDP socket, default 14551
 *
 * ##############################################################################
 * ## VIO
 * ##############################################################################
 *
 * en_vio:
 *         Enable processing of VIO data from MPA to be sent to PX4 as mavlink
 *         odometry messages. Enabled by default.
 *
 * vio_pipe:
 *         Which pipe to subscribe to VIO data. Must be a standard libmodal-pipe
 *         vio_data_t type. Default is qvio
 *
 * en_send_vio_to_qgc:
 *         Enable sending of VIO odometry messages to QGC for debug.
 *         Note PX4 also sends odometry messages to QGC, so look for
 *         the messages in mavlink-inspector marked as from component 197
 *
 * en_reset_vio_if_initialized_inverted:
 *         For VIO algorithms like qVIO that can initialize in any orientation
 *         and output their estimate of the gravity vector, we suggest leaving
 *         this enabled to allow vvpx4 to automatically send the reset signal
 *         back to the VIO pipe if VIO was initialized upside-down or sufficiently
 *         off-level. Helpful if the user powers on a drone while carrying it to
 *         the flight area and VIO starts too early.
 *
 * vio_warmup_s:
 *         Wait this for this amount of time of having good VIO data before
 *         actually starting to send to PX4. This helps stop EKF2 getting
 *         confused if VIO flickers in and out while struggling to init.
 *         Set to 0 to disable the feature.
 *
 * send_odom_while_failed:
 *         Off by default. Reserved for the future when PX4 supports quality field
 *
 * ##############################################################################
 * ## APQ8096-only Features
 * ##############################################################################
 *
 * en_set_clock_from_gps:
 *         Enable setting the VOXL system time to GPS time if no NTP server can be
 *         reached via network to set the time.
 *
 * en_force_onboard_mav1_mode:
 *         Force PX4 to use onboard mode for mavlink 1 channel which is the channel
 *         apq8096 (VOXL1) uses to communicate UART Mavlink with PX4. Not applicable
 *         to qrb5165-based platforms. Sets the MAV1_MODE PX4 param.
 *
 * en_reset_px4_on_error:
 *         Trigger a reboot of PX4 one some of PX4's unrecoverable errors,
 *         Not applicable to qrb5165
 *         Yaw estimate error & High Accelerometer Bias and both detected
 *
 * ##############################################################################
 * ## Misc Features
 * ##############################################################################
 *
 * horizon_cal_tolerance:
 *         Allowable standard deviation in roll/pitch values to consider the drone
 *         stable enough in flight to do a PX4 horizon calibration. Default is 0.45,
 *         you can increase this slightly if flying in a small indoor area or with
 *         a drone that does not hold still very well.
 *         See https://docs.modalai.com/calibrate-px4-horizon/
 *
 * ##############################################################################
 * ## offboard mode config
 * ##############################################################################
 *
 * offboard_mode: The following are valid strings
 *     off: VVPX4 will not send any offboard commands to PX4
 *     figure_eight: Default value, VVPX4 commands PX4 to fly a figure 8 path
 *     follow_tag: Drone will follow an apriltag around. Very dangerous, not
 *                 recommended for customer use, for ModalAI R&D only.
 *     trajectory: VVPX4 receives polynomial trajectories by pipe and commands
 *                 PX4 to follow the trajectory path. Still in development.
 *
 * follow_tag_id:
 *         Apriltag ID to follow in follow_tag mode
 *
 * figure_eight_move_home:
 *         Enable by default, resets the center of the figure 8 path to wherever
 *         the drone is when flipped into offboard mode. When disabled, the drone
 *         will quickly fly back to the XYZ point 0,0,-1.5 in VIO frame before
 *         starting the figure 8. Disabling this feature can be dangerous if VIO
 *         has drifted significantly.
 *
 * robot_radius:
 *         Robot radius to use when checking collisions within the trajectory monitor.
 *                 The trajectory monitor is only active when in trajectory mode
 *
 * collision_sampling_dt:
 *         The time step to sample along the polynomials by when checking for collisions
 *                 in the collision monitor.
 *
 * max_lookahead_distance:
 *         Maximum distance to look along the trajectory. Sensor data further out can be
 *                 unrealiable so keeping this value small reduces false positives
 *
 * ##############################################################################
 * ## Fixed Frame Tag Relocalization
 * ##############################################################################
 *
 * en_tag_fixed_frame:
 *         Enable fixed frame relocalization via voa_inputs.
 *         See: https://docs.modalai.com/voxl-vision-px4-apriltag-relocalization/
 *
 * fixed_frame_filter_len:
 *         Length of the moving average filter to use for smooth relocalization
 *         when a tag is detected. Default is 5, a longer filter will result in
 *         smoother behavior when a new tag comes into view. Set to 1 to do no
 *         filtering at all and assume every tag detection is accurate.
 *
 * en_transform_mavlink_pos_setpoints_from_fixed_frame:
 *         When enabled, mavlink position_target_local_ned_t commands received on
 *         via UDP will be assumed to be in fixed frame and are then transformed
 *         to local frame before being sent to PX4. This allows offboard mode
 *         position commands from MAVROS/MAVSDK to be in fixed frame relative to
 *         voa_inputs even though PX4/EKF2 operates in local frame relative to where
 *         VIO initialized.
 *
 * ##############################################################################
 * ## Collision Prevention (VOA)
 * ## Settings for configuring data sent to PX4 for Collision Prevention
 * ##############################################################################
 *
 * en_voa:
 *         Enable processing of DFS and TOF data to be sent to PX4 as mavlink
 *         obstacle_distance messages for collision prevention in position mode.
 *
 * en_send_voa_to_qgc:
 *         Enable sending of VOA obstacle_distance messages to QGC for debug.
 *
 * voa_lower_bound_m & voa_upper_bound_m:
 *         VOA ignores obstacles above and below the upper and lower bounds.
 *         Remember, Z points downwards in body and NED frames, so the lower bound
 *         is a positive number, and the upper bound is a negative number.
 *         Defaults are lower: 0.15  upper: -0.15 Units are in meters.
 *
 * voa_memory_s:
 *         number of seconds to keep track of sensor readings for VOA
 *         default: 1.0
 *
 * voa_inputs:
 *         Array of pipes to subscribe to for use with VOA, up to 10 supported
 *         Each entry has 4 fields:
 *
 *         enabled: true or false, it's safe to leave this enabled when the pipe is missing
 *         type: can be point_cloud, tof, or rangefinder
 *         input_pipe: pipe name, e.g. stereo_front_pc, rangefinders, tof, etc
 *         frame: frame of reference, should be listed in /etc/modalai/extrinsics/conf
 *
 */
{
        "config_file_version":  1,
        "qgc_ip":       "172.16.0.204",
 *
 * voa_inputs:
 *         Array of pipes to subscribe to for use with VOA, up to 10 supported
 *         Each entry has 4 fields:
 *
 *         enabled: true or false, it's safe to leave this enabled when the pipe is missing
 *         type: can be point_cloud, tof, or rangefinder
 *         input_pipe: pipe name, e.g. stereo_front_pc, rangefinders, tof, etc
 *         frame: frame of reference, should be listed in /etc/modalai/extrinsics/conf
 *
 */
{
        "config_file_version":  1,
        "qgc_ip":       "172.16.0.204",
        "en_secondary_qgc":     false,
        "secondary_qgc_ip":     "192.168.1.214",
        "qgc_udp_port_number":  14550,
        "udp_mtu":      512,
        "en_localhost_mavlink_udp":     true,
        "localhost_udp_port_number":    14551,
        "vio_pipe":     "qvio",
        "en_vio":       true,
        "en_send_vio_to_qgc":   false,
        "en_reset_vio_if_initialized_inverted": true,
        "vio_warmup_s": 3,
        "send_odom_while_failed":       false,
        "horizon_cal_tolerance":        0.5,
        "offboard_mode":        "off",
        "follow_tag_id":        0,
        "figure_eight_move_home":       true,
        "robot_radius": 0.300000011920929,
        "collision_sampling_dt":        0.1,
        "max_lookahead_distance":       1,
        "en_tag_fixed_frame":   false,
        "fixed_frame_filter_len":       5,

The qgc_ip in this file is correct IP address of my PC.