Single channel gateway OTAA signup

[adambichler]

Hello,

What I'm trying to do:
Connect the sensor/board to the Helium network using OTAA activation, using the LMIC library.

Hardware:
I'm using a Heltec WIFI LORA 32 V2 development board: https://heltec.org/project/wifi-lora-32/

Software:
I am currently trying to connect the device using the Helium OTAA example code: https://github.com/mcci-catena/arduino-lmic/blob/master/examples/helium-otaa/helium-otaa.ino . I have tested the code with the Adafruit Feather M0 and its working just fine. I'm working on a mac, working with the EU 868 frequency

I have entered my APPKEY, DEVEUI and APPEUI; also I have changed the pinmap to the following:

const lmic_pinmap lmic_pins = {
      .nss = 18,
      .rxtx = LMIC_UNUSED_PIN,
      .rst = 14,
      .dio = {26, 34, 35},
};

const lmic_pinmap *pPinMap = &lmic_pins;

What I'm getting:

Starting
Packet queued
315336: EV_JOINING
315352: EV_TXSTART
FAILURE 
{my_user_folder}/Documents/Arduino/libraries/MCCI_LoRaWAN_LMIC_library/src/lmic/radio.c:801

Has anyone an idea on where the problem might be? I have read in a forum that it might be a problem due to the LORA V2 being a single channel gateway, but I have no idea on how to solve that problem.

Any help is appreciated!

[terrillmoore]

@adambichler sorry you're having problems.

The error is an assertion failure in radio.c. Radio.c reads the operating mode back from the SX1276 after selecting LoRa mode. It expects to see that the radio is in LoRa mode, but it does not.

I don't see mention of the version of the LMIC being used.

Looks like a hardware problem of some kind.

• Make sure you're not enabling hardware interrupts in your config.
• Try reducing the SPI clock rate.
• If you have a second board, try that.
• Check whether there have been any in-process changes in the design of the Heltec board.
• Check power and disconnect all external devices (if any)
• Make sure there's nothing else on the SPI bus; if there is, make sure the chip select(s) for other devices on the SPI bus are inactive when you're using the LMIC.
• Make sure you have up-to-date libraries, IDE, etc.

Good luck!
--Terry