In a nutshell, my issue is that I got the device to join the LoRaWAN network once, and was able to stay connected until I reset/power cycled the device, at which point it was unable to join again., and remains that way.
Using the ESP32_LoRaWAN OTAA example, with the only thing changed is Class A -> Class C to make sure the device is not missing any packets while asleep in A mode. All other settings are default, except for Freq && DIO && PW LoRa logging, and Core Debug Level: Error set.
Below is the sketch I'm using, a screenshot of my TTN panel to show that things are correctly set up, and serial output on the device showing traffic and failure to join messages.
/*
* HelTec Automation(TM) LoRaWAN 1.0.2 OTAA example use OTAA, CLASS A
*
* Function summary:
*
* - use internal RTC(150KHz);
*
* - Include stop mode and deep sleep mode;
*
* - 15S data send cycle;
*
* - Informations output via serial(115200);
*
* - Only ESP32 + LoRa series boards can use this library, need a license
* to make the code run(check you license here: http://www.heltec.cn/search/);
*
* You can change some definition in "Commissioning.h" and "LoRaMac-definitions.h"
*
* HelTec AutoMation, Chengdu, China.
* 成都惠利特自动化科技有限公司
* https://heltec.org
* [email protected]
*
*this project also release in GitHub:
*https://github.com/HelTecAutomation/ESP32_LoRaWAN
*/
#include <ESP32_LoRaWAN.h>
#include "Arduino.h"
/*license for Heltec ESP32 LoRaWan, quary your ChipID relevant license: http://resource.heltec.cn/search */
uint32_t license[4] = {0x06309046,0x8D56EEF8,0xEA59B397,0x891F4E72};
/* OTAA para*/
uint8_t DevEui[] = { 0x00, 0xF5, 0xBA, 0x35, 0x65, 0x04, 0x0A, 0x72 };
uint8_t AppEui[] = { 0x70, 0xB3, 0xD5, 0x7E, 0xD0, 0x03, 0xE4, 0x02 };
uint8_t AppKey[] = { 0x0C, 0x8B, 0xA5, 0xE1, 0xB2, 0x56, 0x73, 0xDB, 0x03, 0x79, 0x12, 0x7C, 0xD7, 0xE9, 0x8E, 0x5A };
/* ABP para*/
uint8_t NwkSKey[] = { 0x15, 0xb1, 0xd0, 0xef, 0xa4, 0x63, 0xdf, 0xbe, 0x3d, 0x11, 0x18, 0x1e, 0x1e, 0xc7, 0xda,0x85 };
uint8_t AppSKey[] = { 0xd7, 0x2c, 0x78, 0x75, 0x8c, 0xdc, 0xca, 0xbf, 0x55, 0xee, 0x4a, 0x77, 0x8d, 0x16, 0xef,0x67 };
uint32_t DevAddr = ( uint32_t )0x007e6ae1;
/*LoraWan channelsmask, default channels 0-7*/
uint16_t userChannelsMask[6]={ 0x00FF,0x0000,0x0000,0x0000,0x0000,0x0000 };
/*LoraWan Class, Class A and Class C are supported*/
DeviceClass_t loraWanClass = CLASS_C;
/*the application data transmission duty cycle. value in [ms].*/
uint32_t appTxDutyCycle = 15000;
/*OTAA or ABP*/
bool overTheAirActivation = true;
/*ADR enable*/
bool loraWanAdr = true;
/* Indicates if the node is sending confirmed or unconfirmed messages */
bool isTxConfirmed = true;
/* Application port */
uint8_t appPort = 2;
/*!
* Number of trials to transmit the frame, if the LoRaMAC layer did not
* receive an acknowledgment. The MAC performs a datarate adaptation,
* according to the LoRaWAN Specification V1.0.2, chapter 18.4, according
* to the following table:
*
* Transmission nb | Data Rate
* ----------------|-----------
* 1 (first) | DR
* 2 | DR
* 3 | max(DR-1,0)
* 4 | max(DR-1,0)
* 5 | max(DR-2,0)
* 6 | max(DR-2,0)
* 7 | max(DR-3,0)
* 8 | max(DR-3,0)
*
* Note, that if NbTrials is set to 1 or 2, the MAC will not decrease
* the datarate, in case the LoRaMAC layer did not receive an acknowledgment
*/
uint8_t confirmedNbTrials = 8;
/*LoraWan debug level, select in arduino IDE tools.
* None : print basic info.
* Freq : print Tx and Rx freq, DR info.
* Freq && DIO : print Tx and Rx freq, DR, DIO0 interrupt and DIO1 interrupt info.
* Freq && DIO && PW: print Tx and Rx freq, DR, DIO0 interrupt, DIO1 interrupt and MCU deepsleep info.
*/
uint8_t debugLevel = LoRaWAN_DEBUG_LEVEL;
/*LoraWan region, select in arduino IDE tools*/
LoRaMacRegion_t loraWanRegion = ACTIVE_REGION;
static void prepareTxFrame( uint8_t port )
{
appDataSize = 4;//AppDataSize max value is 64
appData[0] = 0x00;
appData[1] = 0x01;
appData[2] = 0x02;
appData[3] = 0x03;
}
// Add your initialization code here
void setup()
{
Serial.begin(115200);
while (!Serial);
SPI.begin(SCK,MISO,MOSI,SS);
Mcu.init(SS,RST_LoRa,DIO0,DIO1,license);
deviceState = DEVICE_STATE_INIT;
}
// The loop function is called in an endless loop
void loop()
{
switch( deviceState )
{
case DEVICE_STATE_INIT:
{
LoRaWAN.init(loraWanClass,loraWanRegion);
break;
}
case DEVICE_STATE_JOIN:
{
LoRaWAN.join();
break;
}
case DEVICE_STATE_SEND:
{
prepareTxFrame( appPort );
LoRaWAN.send(loraWanClass);
deviceState = DEVICE_STATE_CYCLE;
break;
}
case DEVICE_STATE_CYCLE:
{
// Schedule next packet transmission
txDutyCycleTime = appTxDutyCycle + randr( -APP_TX_DUTYCYCLE_RND, APP_TX_DUTYCYCLE_RND );
LoRaWAN.cycle(txDutyCycleTime);
deviceState = DEVICE_STATE_SLEEP;
break;
}
case DEVICE_STATE_SLEEP:
{
LoRaWAN.sleep(loraWanClass,debugLevel);
break;
}
default:
{
deviceState = DEVICE_STATE_INIT;
break;
}
}
}
TX on freq 903000000 Hz at DR 4
DIO0:TX Done
RX on freq 923300000 Hz at DR 8
RX on freq 923300000 Hz at DR 13
DIO1:RX Timeout
RX on freq 923300000 Hz at DR 8
TX on freq 902900000 Hz at DR 0
DIO0:TX Done
RX on freq 923300000 Hz at DR 8
RX on freq 925100000 Hz at DR 10
DIO1:RX Timeout
RX on freq 923300000 Hz at DR 8
join failed, rejoin at 30000 ms later
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