Using Moteino 8Mhz / LMIC / LoraWan / The Things Network [solved]

[ryanlath]

Hello,

I've got a Moteino 8Mhz with RFM95 radio and I've wired up the RFM95's D0 & D01 pins to Moteino pins.  I'm using the LMIC library and instructions from https://github.com/lukastheiler/ttn_moteino.  I'm able to send one message to TTN, and then nothing.  It seems the TX never completes/gets a response, so it hangs  (OP_TXRXPEND)... but I can't figure out why.

I've tried different LMIC libraries, pin mappings, a different Moteino 8, a local LoraServer, but I'm at a loss as to next debugging steps, so my questions are
  1) has anyone had success using a Moteino 8 to connect to TTN?  If so, please enlighten! 
  2) Is there some hardware reason why this is NOT possible? 

Thanks,
Ryan

[Felix]

Did you try this with a Moteino (regular, 16mhz)? Does that make a difference? If not then then we can look past the fact that it's just half the frequency.
You could actually make the Moteino 8mhz run at 16mhz (provide 3.3V, not less) since the 16mhz resonator is onboard, just not enabled by fuses.
But you'll need an AVR programmer and also you need to burn the 16mhz bootloader.
I haven't tried a Moteino 8 with LoRa/LMIC/TTN so I can't help with that, but maybe others who did this have some insight.

[ryanlath]

I haven't tried a regular Moteino, yet.  This person https://www.thethingsnetwork.org/labs/story/lorawan-gsp-tracker seems to have regular Mini Pro 3.3v working, though.   

[ryanlath]

I wired up a 3.3V/8Mhz mini pro and radio manually.  It worked, so it took me 2 seconds to find my user error.  To save anyone else some time.  10 and 2 are moteino's pre-wired pins.  DIO1 & DIO2 will be dependent on your wiring.

Code Select Expand

const lmic_pinmap lmic_pins = {
  .nss = 10,
  .rxtx = LMIC_UNUSED_PIN,
  .rst = LMIC_UNUSED_PIN,
  .dio = {2, DIO1, DIO2},
}

[Felix]

Great, thanks, so it's solved?

[ryanlath]

Yes, solved.