I’m busy building a simple LoRa temperature probe. I have gotten to a point where every works and I’m trying to optimise the power usage.
I can’t get it below the 90ma on battery power. Witch is way to mutch.
I have tried multiple things:
Disconnected all peripherals, a different meter and multiple example codes.
/*
* HelTec Automation(TM) LoRaWAN 1.0.2 OTAA example use OTAA, CLASS A
*
* Function summary:
*
* - use internal RTC(150KHz);
*
* - Forward the data measured by the 12-bit ADC to the server.
*
* - 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
* support@heltec.cn
*
*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] = {0x4915A653,0xC69E42EE,0x0D9EA6D4,0xB5201468};
/* OTAA para*/
uint8_t DevEui[] = { 0x22, 0x32, 0x33, 0x00, 0x00, 0x88, 0x88, 0x02 };
uint8_t AppEui[] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
uint8_t AppKey[] = { 0x88, 0x88, 0x88, 0x88, 0x88, 0x88, 0x88, 0x88, 0x88, 0x88, 0x88, 0x88, 0x88, 0x88, 0x66, 0x01 };
/* 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_A;
/*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 ADC_Process(uint16_t val){
appDataSize = 4 ;
int TH = (int)(val / 1000);
appData[3] = (char)(TH) ;
int HU = (int)((val - TH*1000) / 100);
appData[2] = (char)(HU) ;
int Ten = (int)((val - TH * 1000 - HU * 100) / 10);
appData[1] = (char)(Ten) ;
int Sin = (val % 10);
appData[0] = (char)(Sin) ;
}
#define Vext 21
// 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);
adcAttachPin(37);
analogSetClockDiv(255); // 1338mS
pinMode(Vext, OUTPUT);
deviceState = DEVICE_STATE_INIT;
}
// The loop function is called in an endless loop
void loop()
{
switch( deviceState )
{
case DEVICE_STATE_INIT:
{
#if(LORAWAN_DEVEUI_AUTO)
LoRaWAN.generateDeveuiByChipID();
#endif
LoRaWAN.init(loraWanClass,loraWanRegion);
break;
}
case DEVICE_STATE_JOIN:
{
LoRaWAN.join();
break;
}
case DEVICE_STATE_SEND:
{
digitalWrite(Vext, LOW);
delay(10);
uint16_t ADC_voltage = analogRead(37);
digitalWrite(Vext, HIGH);
ADC_Process( ADC_voltage );
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;
}
}
}
Can someone point me to the right direction to fix this?
Greetings,
Sander