LMIC Mini Ultra Pro v2

[gminich]

I’m getting back to an old project that I had to abandon due to other priorities. I used the LMIC library from 2018 with some Mini Ultra Pro v2 boards and did not have any issues. Yesterday, I updated LMIC with the new, supported library and modified the ttn-otaa sample and could not get the device to communicate with my TTN gateway. I determined that the problem seems to be in the os_init() since the program does not seem to return from it. I provided the TTN and device keys as per my original program and used the following hardware config:

const lmic_pinmap lmic_pins = {
.nss = 5,
.rxtx = LMIC_UNUSED_PIN,
.rst = 3,
.dio = {2, 6, LMIC_UNUSED_PIN},
};

I obtained LMIC from:
https://github.com/mcci-catena/arduino-lmic

Can anyone shed some light on why the new version of LMIC is not working with my configuration? I have some Mini Ultra LoraWAN devices on order and looking forward to continue my testing of TTN applications.

Thank you

[gminich]

I noticed this output during building:

C:\Users\gmini_000\Documents\Arduino\libraries\arduino-lmic-master\src\hal\getpinmap_thisboard.cpp: In function ‘const Arduino_LMIC::HalPinmap_t* Arduino_LMIC::GetPinmap_ThisBoard()’:

C:\Users\gmini_000\Documents\Arduino\libraries\arduino-lmic-master\src\hal\getpinmap_thisboard.cpp:65:72: note: #pragma message: Board not supported — use an explicit pinmap

#pragma message(“Board not supported — use an explicit pinmap”)

I have defined the pins as per my above message. Not sure why this would not be supported.

Thank you

[gminich]

I re-created the above code section regarding lmic pin configuration and the warning was resolved. I still have the issue with os_init() never returning.

Thank you

[LIM PHANG MOH]

Hi George,
I haven’t personally try the latest version on the MCCI repository unfortunately. I will try this on a V3 board after Chinese New Year as I’m trying to finish some assembly date line.

[gminich]

Yes, you may want to test this on the V3 as it does not seem to work on the V2 whatsoever. The good news is that I downgraded to the MCCI LMIC v2.3.2 and the issue was resolved. Something in v3.0.99 is not right which causes an issue in os_init().

Thank you!

[Author]

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