SparkFun LoRa Thing Plus - expLoRaBLE example

[gpabdo]

Does anyone have the expLoRaBLE working on a US915 LoRaWan network? I am banging my head trying to get it to talk to a WaveShare gateway. I don't even see the join request coming though in the gateway logs, though I see other devices sending join requests. Gateway is configured to use channels 16-23 I think...

INFO: radio 0 enabled (type SX1250), center frequency 904300000, RSSI offset -215.399994, tx enabled 1, single input mode 0
INFO: radio 1 enabled (type SX1250), center frequency 905000000, RSSI offset -215.399994, tx enabled 0, single input mode 0
INFO: Lora multi-SF channel 0>  radio 0, IF -400000 Hz, 125 kHz bw, SF 5 to 12
INFO: Lora multi-SF channel 1>  radio 0, IF -200000 Hz, 125 kHz bw, SF 5 to 12
INFO: Lora multi-SF channel 2>  radio 0, IF 0 Hz, 125 kHz bw, SF 5 to 12
INFO: Lora multi-SF channel 3>  radio 0, IF 200000 Hz, 125 kHz bw, SF 5 to 12
INFO: Lora multi-SF channel 4>  radio 1, IF -300000 Hz, 125 kHz bw, SF 5 to 12
INFO: Lora multi-SF channel 5>  radio 1, IF -100000 Hz, 125 kHz bw, SF 5 to 12
INFO: Lora multi-SF channel 6>  radio 1, IF 100000 Hz, 125 kHz bw, SF 5 to 12
INFO: Lora multi-SF channel 7>  radio 1, IF 300000 Hz, 125 kHz bw, SF 5 to 12
INFO: Lora std channel> radio 0, IF 300000 Hz, 500000 Hz bw, SF 8, Explicit header

SX1262 radio = new Module(D36, D40, D44, D39, SPI1);

LoRaWANNode node(&radio, &US915);

void setup() {
  Serial.begin(9600);
  int state = radio.begin(915.0, 125.0, 8, 5, 0x34, 10, 8, 0, false);
if(state == RADIOLIB_ERR_NONE) {
    Serial.println(F("success!"));
  } else {
    Serial.print(F("failed, code "));
    Serial.println(state);
    while(true);
  }

  uint64_t joinEUI = 0x<REDACTED>;
  uint64_t devEUI = 0x<REDACTED>;
  uint8_t appKey[] = { <REDACTED> };
  uint8_t nwkKey[] = { <REDACTED>};

  node.startChannel = 16;
  node.numChannels = 8;

  Serial.print(F("[LoRaWAN] Attempting over-the-air activation ... "));
  state = node.beginOTAA(joinEUI, devEUI, nwkKey, appKey);
  if(state == RADIOLIB_ERR_NONE) {
    Serial.println(F("success!"));
  } else {
    Serial.print(F("failed, code "));
    Serial.println(state);
    while(true);
  }

this code just hangs at:

[SX1262] Initializing ... 
RadioLib Debug Info
Version:  6.2.0.0
Platform: Sparkfun Apollo3
Compiled: Oct 14 2023 11:45:11

Found SX126x: RADIOLIB_SX126X_REG_VERSION_STRING:
320  

M	SX126x
success!
[LoRaWAN] Attempting over-the-air activation ... Channel frequency UL = %f MHz

with no join packet seen on the gateway..

[gpabdo]

So I have found that the code hangs at

mod->hal->setPersistentParameter<uint16_t>(RADIOLIB_PERSISTENT_PARAM_LORAWAN_DEV_NONCE_ID, devNonce + 1);

Not sure why persisting is an issue yet....

https://github.com/jgromes/RadioLib/blob/master/src/protocols/LoRaWAN/LoRaWAN.cpp#L85

[gpabdo]

Okay, so two issues. Biggest issue is the setPersistentParameter but 2nd is that I was using the wrong set of channels as well... Gateway is configured to use

node.startChannel = 8;
node.numChannels = 8;

Getting closer....

[jgromes]

At the moment, LoRaWAN requires persistent storage to function. Does SparkFun's platform provide the EEPROM library?

[gpabdo]

At the moment, LoRaWAN requires persistent storage to function. Does SparkFun's platform provide the EEPROM library?

So, looks like it: https://github.com/sparkfun/Arduino_Apollo3/tree/main/libraries/EEPROM

but I am not sure how this gets implemented for each device...
https://github.com/jgromes/RadioLib/blob/master/src/Hal.h#L247

[jgromes]

Looking a bit into the Apollo3 EEPROM emulation, looks it needs to be initialized before usage - I added that, could you test it resolves the issue?

but I am not sure how this gets implemented for each device...

Hal.h is only the interface, the actual implementations are in ArduinoHal.h/.cpp.

[gpabdo]

Thanks so much, this fixed the persistence problem and I am able to join the device to the gateway!

Unfortunately, I have hit another issue after the successful beginOTAA()....

String strUp = "Hello World! #" + String(count++);
int state = node.uplink(strUp, 10);

[LoRaWAN] Attempting over-the-air activation ... success!
[LoRaWAN] Sending uplink packet ... Channel frequency UL = 0.000 MHz
failed, code -12
[LoRaWAN] Waiting for downlink ... Channel frequency DL = 0.000 MHz
failed, code -12
[LoRaWAN] Sending uplink packet ... Channel frequency UL = 0.000 MHz
failed, code -12
[LoRaWAN] Waiting for downlink ... failed, code -1105

[jgromes]

There should be some debug during joinig, could you show that as well? https://github.com/jgromes/RadioLib/wiki/Debug-mode

[gpabdo]

Okay, so that part seems to have been a misconfiguration on my part on the gateway side, it was not sending the subset of channels in the join accept message... Now that I added the 0-8 subset, the uplink gets a little closer to sending... I think.

[SX1262] Initializing ... 
RadioLib Debug Info
Version:  6.2.0.0
Platform: Sparkfun Apollo3
Compiled: Oct 15 2023 21:09:48

Found SX126x: RADIOLIB_SX126X_REG_VERSION_STRING:
320  

M	SX126x
success!
[LoRaWAN] Attempting over-the-air activation ... Channel frequency UL = 902.700 MHz
Timeout in 556032 us
Channel frequency DL = 924.500 MHz
joinAcceptMsg:
0  
10  
20  
mask[0] = 0xff
chNum = 0, chSpan = 0
Channel DL 0 frequency = 902.300 MHz
chNum = 1, chSpan = 0
Channel DL 1 frequency = 902.500 MHz
chNum = 2, chSpan = 0
Channel DL 2 frequency = 902.700 MHz
chNum = 3, chSpan = 0
Channel DL 3 frequency = 902.900 MHz
chNum = 4, chSpan = 0
Channel DL 4 frequency = 903.100 MHz
chNum = 5, chSpan = 0
Channel DL 5 frequency = 903.300 MHz
chNum = 6, chSpan = 0
Channel DL 6 frequency = 903.500 MHz
chNum = 7, chSpan = 0
Channel DL 7 frequency = 903.700 MHz
mask[1] = 0x0
mask[2] = 0x0
mask[3] = 0x0
mask[4] = 0x1
chNum = 0, chSpan = 1
Channel DL 8 frequency = 903.000 MHz
success!
[LoRaWAN] Sending uplink packet ... Channel frequency UL = 902.700 MHz
uplinkMsg pre-MIC:
0  
10  
20  
uplinkMsg:
0  
10  
20  
Timeout in 678912 us
failed, code -5
[LoRaWAN] Waiting for downlink ... failed, code -1105