running the following on a Heltec WiFi LoRa32 (V3)
// Heltek LoRa V3 LoRaWAN test - transmits packet every 60 seconds then sleeps
// ERRORS in library
// http://community.heltec.cn/t/solved-heltec-lora-v3-compiler-time-errors/18877
//edited sx126x.c line 9 replaced “ with ", i.e. #include “Arduino.h“ with #include “Arduino.h”
//edited sx1262-board.c retyped … in line 34 extern void lora_printf(const char *format, …);
// see https://github.com/HelTecAutomation/Heltec_ESP32/blob/master/examples/LoRaWAN/LoRaWan/LoRaWan.ino
/* Heltec Automation LoRaWAN communication example
*
* Function:
* 1. Upload node data to the server using the standard LoRaWAN protocol.
*
* Description:
* 1. Communicate using LoRaWAN protocol.
*
* HelTec AutoMation, Chengdu, China
* 成都惠利特自动化科技有限公司
* www.heltec.org
*
* */
#include "LoRaWan_APP.h"
/* OTAA para*/
uint8_t devEui[] = {xxxxxxxxxxxxxxxx };
uint8_t appEui[] = {xxxxxxxxxxxxxxxxxxx };
uint8_t appKey[] = { yyyyyyyyyyyyyyyy };
/* ABP para*/
uint8_t nwkSKey[] = { zzzzzzzzzzzzzzzzzz };
uint8_t appSKey[] = {zzzzzzzzzzzzzzzzzzz };
uint32_t devAddr = ( uint32_t )zzzzzz;
/*LoraWan channelsmask, default channels 0-7*/
uint16_t userChannelsMask[6]={ 0x00FF,0x0000,0x0000,0x0000,0x0000,0x0000 };
/*LoraWan region, select in arduino IDE tools*/
LoRaMacRegion_t loraWanRegion = ACTIVE_REGION;
/*LoraWan Class, Class A and Class C are supported*/
DeviceClass_t loraWanClass = CLASS_A;
/*the application data transmission duty cycle. value in [ms].*/
uint32_t appTxDutyCycle = 60000;
/*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 = 4;
/* Prepares the payload of the frame */
static void prepareTxFrame( uint8_t port )
{
/*appData size is LORAWAN_APP_DATA_MAX_SIZE which is defined in "commissioning.h".
*appDataSize max value is LORAWAN_APP_DATA_MAX_SIZE.
*if enabled AT, don't modify LORAWAN_APP_DATA_MAX_SIZE, it may cause system hanging or failure.
*if disabled AT, LORAWAN_APP_DATA_MAX_SIZE can be modified, the max value is reference to lorawan region and SF.
*for example, if use REGION_CN470,
*the max value for different DR can be found in MaxPayloadOfDatarateCN470 refer to DataratesCN470 and BandwidthsCN470 in "RegionCN470.h".
*/
appDataSize = 4;
appData[0]++;// = 0x00;
appData[1] = 0x01;
appData[2] = 0x02;
appData[3] = 0x03;
Serial.printf("Sending %d ", appData[0]);
}
//if true, next uplink will add MOTE_MAC_DEVICE_TIME_REQ
void setup() {
Serial.begin(115200);
Mcu.begin(HELTEC_BOARD,SLOW_CLK_TPYE);
}
void loop()
{
switch( deviceState )
{
case DEVICE_STATE_INIT:
{
#if(LORAWAN_DEVEUI_AUTO)
LoRaWAN.generateDeveuiByChipID();
#endif
LoRaWAN.init(loraWanClass,loraWanRegion);
//both set join DR and DR when ADR off
LoRaWAN.setDefaultDR(3);
break;
}
case DEVICE_STATE_JOIN:
{
LoRaWAN.join();
break;
}
case DEVICE_STATE_SEND:
{
prepareTxFrame( appPort );
LoRaWAN.send();
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); // goto sleep - ESP32S3 in deep sleep
break;
}
default:
{
deviceState = DEVICE_STATE_INIT;
break;
}
}
}
gives results
LoRaWAN joining transmitting etc 100mA
LoRaWAN.sleep() called 25uA
to measure microamp currents you need a good quality digital or analogue multimeter - I use an Avo 9mkII
