As per the previous thread, I’ve updated my Postcard to RTK Everywhere V3.1 and the LG290P to v2.1.
On my rover and base, I have 4 constellations turned on. On my rover, I have it set to 10hz and for NMEA messages, I have GGA and VTG turned on. I have no Rover RTCM messages.
I am connecting to the Rover via a Bluetooth and displaying the output in a Terminal app as well as a custom app.
In both apps, I am seeing times where the Rover seems to be lagging or hanging as the numbers don’t update for 1-2sec. Its seems random timing - 7-15sec apart. I am communicating between the rover and the base via their ESP-NOW radios and they are close. My other app shows good comm between the base and rover - mostly 1sec or less and never getting over 2sec.
Additionally, but much less frequently, the Rover will drop RTK Fix (either to Float or vary rarely lower) but quickly correct. Currently I am testing with the Rover stationary.
I am tracking a high speed object through a set course and as such I need there to be no lags or drops in RTK Fix. Has this been tested? Is there any other thoughts? Any other info I can provide to help diagnose?
The module still has two uarts available and it is recommended to use only one of the esp communications (wifi/ble_bt) at a time and for only one client (app)…
Specifically, it would be appropriate (for base to rover) to connect the two postcards with an ad hoch radio_link and manage the apps, each one, on a free uart exclusively.
Regards
You can also try 2 constellations (Base and Rover) and confirm MSM4 (not 7), based on your objectives.
That can reduce the Base=>Rover traffic and probably wont impact the positioning performance much in this scenario. But to be honest, the Base is sending RTCM at 1 Hz and that shouldn’t be a problem for 4 constellations.
Sorry - should have been more clear - I am only using one app (serial or custom) at a time. I am also using MSM4 not 7.
I will be getting radio to connect thru UART hopefully soon. I guess I could wire the uarts directly together for testing on the Postcards (Tx to Rx and vice versa) and disable the ESP-now radios to see if that makes a difference
I wired my base Tx UART to the Rx on the Rover, turned off my ESP-NOW radio and tested.
Much better but still seeing a consistent delay every 7ish seconds. Its a shorter delay but still noticeable. I didn’t notice it losing fix either. Any thoughts?