@scosgrove , I just wanted to mention that our ESC driver for PX4 is also using UART running at 2Mbit. The Flight Control loop sends out commands at 800Hz and each control packet is 15 bytes long. Also one ESC channel (out of four) sends feedback to the DSP for every command. The feedback packet size is 16 bytes (at 800hz), that would be 12800 bytes/s. We almost never see missed RX data. I have also experimented with larger feedback packets (~42 bytes at 800hz = 33600 bytes/s received by DSP).

Can you please clarify how the data is batched when the byte loss happens - how many bytes are sent without a break?

Alex

@modaltb

Hey Travis,

Thank you very much for your explanation and for passing on the link.
I understand how it was done now.

I will consider what is the next possible option for the project.  
I appreciate your time.

Best Regards,
Leon

@I_Dwyer @Chad-Sweet Hello all, has this issue been solved in and particular version, we too are facing the same issue, on HS1 the voxl-mavlink server is initiating but we are not able to see any data from this port. We are right now on the 1.5.3 build. Pls provided more info on the same.

Which version of PX4 are you running on the Pixhawk and do you have a magnetometer connected? EKF2 is generally unhappy about about starting without a magnetometer in PX4 1.11 so we patched the PX4 firmware for Flight Core to get around this. In PX4 1.12 and newer the following PX4 parameter can be set to allow EKF2 to allow position mode without a GPS/Mag

## disable mag SYS_HAS_MAG 0 EKF2_MAG_TYPE 5

@modaltb hello, when will the next SDK release be available? Would love to the UARTs working for external FC. Thank you.