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| /*
* Emetteur sur FireBeetle DFR0478 + LoRa RFM95
* Soil moisture sensor sur ADC A3 (GPIO 35)
* Tension batterie sur A0 (GPIO 36)
* Commande Vcc soil sensor + Vcc module LoRa via MOSFET sur GPIO 12
* Deep sleep timer
* FF - mars 2023
*/
// Libraries for LoRa module SX1276
#include <SPI.h>
#include <LoRa.h>
#include <driver/rtc_io.h>
// Soil moisture sensor
#define soil 35
// Constant for dry sensor
const int DryValue = 2590;
// Constant for wet sensor
const int WetValue = 1430;
// Variables for soil moisture
int soilMoistureValue;
int soilMoisturePercent;
// (Vcc Soil + Vcc LoRa) enable pin
const int Vccenable = 12;
// Battery voltage
const int vinput = 36;
// Constant for voltage measurement
int valueVolt = 0;
float vbatt = 0.0;
// Define the pins used by the LoRa transceiver module
#define SCK 18
#define MISO 19
#define MOSI 23
#define SS 5
#define SS_GPIO_NUM GPIO_NUM_5
#define RST 14
#define RST_GPIO_NUM GPIO_NUM_14
#define DIO0 2
//433E6 for Asia
//868E6 for Europe
//915E6 for North America
#define BAND 868E6 // For France
// LoRa message variable
String outgoing;
// Addresses
byte localAddress = 0xCC; // 204 in Decimal
byte destination = 0xFF; // 255 in Decimal
// Count of outgoing messages
byte msgCount = 0;
// Count of LoRa sent times
byte lorasent;
const uint64_t uS_TO_S_FACTOR = 1000000ull; /* Conversion factor for micro
seconds to seconds */
const uint64_t TIME_TO_SLEEP = 10ull; /* Time ESP32 will go to sleep (in
seconds) */
RTC_DATA_ATTR uint32_t bootCount = 0;
void setup() {
// Initialize Serial Monitor
Serial.begin(115200);
delay(500);
// Switch Vcc on
pinMode(Vccenable,OUTPUT);
digitalWrite(Vccenable, HIGH);
delay(1000);
rtc_gpio_hold_dis(SS_GPIO_NUM);
rtc_gpio_hold_dis(RST_GPIO_NUM);
// Define soil analog pin mode + set ADC to use 12 bits
pinMode(soil,INPUT);
analogReadResolution(12);
// Battery voltage reading
valueVolt = analogRead(vinput);
vbatt = (valueVolt * 3.3) / 4095.0;
// SPI LoRa pins
SPI.begin(SCK, MISO, MOSI, SS);
// Setup LoRa transceiver module
LoRa.setPins(SS, RST, DIO0);
if (!LoRa.begin(BAND)) {
Serial.println("Lancement de LoRa échoué");
while (true); yield();
}
Serial.println("Initialisation LoRa OK !");
// Get soil moisture value
soilMoistureValue = analogRead(soil);
// Determine soil moisture percentage value
soilMoisturePercent = map(soilMoistureValue, DryValue, WetValue, 0, 100);
// Keep values between 0 and 100
soilMoisturePercent = constrain(soilMoisturePercent, 0, 100);
// Increment boot number and print it every reboot
++bootCount;
Serial.println("Boot number: " + String(bootCount));
// Number of packets transmitted (default = 1)
for(lorasent=0 ; lorasent<1 ; lorasent++)
{
outgoing = byte(destination) + String("*") + byte(localAddress) + String("!") + String(soilMoisturePercent) + String("/") + String(vbatt);
// LoRa packet sent
LoRa.beginPacket();
LoRa.print(outgoing);
LoRa.endPacket();
delay(500);
}
msgCount++; // Increment message ID
Serial.print("LoRa MESSAGE SENT: ");
Serial.println(String(outgoing));
Serial.println("destination: " + String("0x") + String(destination, HEX));
Serial.println("localAddress: " + String("0x") + String(localAddress, HEX));
Serial.println("Humidity: " + String(soilMoisturePercent) + String("%"));
Serial.println("Battery: " + String(vbatt) + String("V"));
// Configure the wake up source (Timer)
esp_sleep_enable_timer_wakeup(TIME_TO_SLEEP * uS_TO_S_FACTOR);
// Stop LoRa module before going to deep sleep
LoRa.end();
delay(600);
// Set SS and RST before going to deep sleep
digitalWrite(SS, HIGH);
rtc_gpio_hold_en(SS_GPIO_NUM);
digitalWrite(RST, HIGH);
rtc_gpio_hold_en(RST_GPIO_NUM);
// Disable Vcc (soil moisture sensor + LoRa module)
digitalWrite(Vccenable, LOW);
delay(500);
// Start going to deep sleep
Serial.println("Going to sleep now");
Serial.flush();
esp_deep_sleep_start();
}
void loop() {} |
