I’ve been working on this a bit more with no success.
I again tried the other firmware that was uploaded by Cturvey with the other suggestions from the other thread with disconnecting the transmit wire from the rover to the lora.
Additionally, to try and get the LoRa to operate as fast as possibly, I changed the following parameters to:
TxToRxUsec=150
HeatBeatTimeout=2000
CodingRate = 5
FrequencyHop= 0
MaxResends=1
Framestoyield=1
Encryptdata=0
SerialSpeed=115200 (essentially the minimum speed that the Postcard (LG290P will accept). I did keep the LoRa’s at 57600 for one test with no change.
None of these changes helped in my testing where I was testing with only GPS and Galileo on. Everytime I would turn on the ESP-NOW radios, I would get an immediate fix. For whatever reason, it seems like the LoRas can’t transfer a long enough data and quick enough as I continually see last transfer times from 14 to 50sec.
Unless there is something I am missing, it seems like I am wasting my time by trying to do more testing and changes to make these LoRas work. Its frustrating as I purchased them with the documentation saying they would work and designed a custom enclosure to fit the LoRas and the Postcards that I was going to upload to GitHub for others to 3d print. No real point in that if they don’t work though.
Sparkfun hasn’t weighed in for awhile in this thread - not sure if they have done any testing or not.
I do think that Sparkfun needs to remove all the verbiage and pictures showing the LoRa’s as options for communications between the base and the rover as it just doesn’t seem like they have the capability to provide the required comms.
Happy to be proven wrong on any of the above or if there are other options I am missing but it doesn’t seem so at this time.