Difficulty to debug and make it working

[pierrot10]

Helo I am very new with Lora and I am trying to build a node with a Feather MO Lora board

I connect the pim has it's shown here

I also download the library LoRa-LMIC-1.51 as it's written here , and then I configured the code with

At TTN web site I created a new devise and I saved it as the following
// LoRaWAN Config
// Device Address
devaddr_t DevAddr = 0x26011942; // TTN Device Address

// Network Session Key
unsigned char NwkSkey[16] = { 0x25, 0x64, 0x48, 0xC4, 0x39, 0x57, 0x84, 0x89, 0x57, 0x33, 0xCA, 0x80, 0xF0, 0xF4, 0xA1, 0xD8 }; // TTN Network Session Key

// Application Session Key
unsigned char AppSkey[16] = { 0x9A, 0xCB, 0xE8, 0x23, 0x4D, 0xC5, 0xCB, 0x37, 0xDB, 0x33, 0x85, 0x28, 0xCD, 0x28, 0x16, 0x01 }; // TTN App Session Key

// LoRaWAN Application identifier (AppEUI)
static const u1_t AppEui[8] PROGMEM = { 0x70, 0xB3, 0xD5, 0x7E, 0xF0, 0x00, 0x64, 0x29 }; // TTN Application EUI

I upload my code and here is the print I got (I add some debug point. All print starting with "DEBUG: ..." are debug I added into the code)

Beginning to send data seqno 1: Battery: 4.24 LMIC_setTxData2 DEBUG: engineUpdate DEBUG: End engineUpdate dataSent2:0 seqno 1: Free Memory: 28735 LMIC_setTxData2 DEBUG: engineUpdate DEBUG: End engineUpdate DEBUG: engineUpdate DEBUG: processDnData DEBUG: onEvent DEBUG: EV_TXCOMPLETE DEBUG: engineUpdate Sleeping for 92 seconds

But nothing is recorded into my TTN console even if I am close within 5km of a gateway. How should I exactly configure my devise by TTN?

Into the sketch file, I also observed the followin initLoRaWAN() function;

Is there a way debug if the node joned the nearest gateway? Is tere a way to have thr following funtion to return true or flase? Is there a way to know if data has been recorded or not to TTN? If I am on the train, does the node will send message to a gateway if the train through an area coavered by a gateway? Or does the node have to join first a gateway and a node can not move...

I thank a lot if you tell me more about Feather MO Lora board with the goal to send sensor measurement to TTN

Many thank

void initLoRaWAN() {
    // LMIC init
  sprintln(F("=> os_init"),2);
    os_init();

    // Reset the MAC state. Session and pending data transfers will be discarded.
  sprintln(F("=> LMIC_reset"),2);
    LMIC_reset();

    // by joining the network, precomputed session parameters are be provided.
    sprintln(F("=> Joining network"),2);
    LMIC_setSession(0x1, DevAddr, (uint8_t*)NwkSkey, (uint8_t*)AppSkey);

    // Enabled data rate adaptation
  sprintln(F("=> Enable data rate adaptation)"),2);
    LMIC_setAdrMode(1);

    // Enable link check validation
  sprintln(F("=> Enable link check validation"),2);
    LMIC_setLinkCheckMode(0);

    // Set data rate and transmit power
  sprintln(F("=> Set data rate and transit power"),2);
    LMIC_setDrTxpow(DR_SF12, 21);
}

[pierrot10]

Hello, I am sorry to come back to this issue but I am still experiencing that issue. I would appreciate if someone can tell how to make it working with TTN. Cheers and great day!

[grhabyt]

@mikenz First, thanks for the library, it's much easier to follow than most approaches. I am also trying to get this going with TTN. Could you provide some sample code? @pierrot10 I read somewhere else that the TTN DevEUI and the AppEUI need to be little-endian, but the AppKey should be big-endian. Does that help?

[mikenz]

Hi, there's no TTN gateways near me, only two in the whole country, so it's not something I'll be looking at any time soon.