LoraComms/SensorTransceiverNode/Sensors.cpp

#include "Sensors.h"

OneWire wire(SENSOR_TYPE_SOIL_TEMPERATURE);
DallasTemperature soilTempSensor(&wire);
Sensors::Sensors() : sensorFlags(0x000) {}

void Sensors::initialize() {
    initBarometer();
    initSCD30();
    initRainSensor();
    initWindSensor();
    initSoilSensors();
    initLightSensor();
    int count = 0;
    for (int i = 0; i < 32; i++) {
        if (sensorFlags & (1 << i)) count++;
    }

    // Allocate memory for messages
    messageArraySize = count;
    messages = new Message[messageArraySize];
}

void Sensors::setAddress(uint8_t id) {
    NODE_ID = id;
}

void Sensors::initBarometer() {
    if (bme.begin(/*0x76*/)) {
        sensorFlags |= BAROMETER_BIT;
    }
}

void Sensors::initSCD30() {
  
    if (scd30.begin(Wire)) {
        sensorFlags |= SCD30_TEMPERATURE_BIT;
        sensorFlags |= SCD30_HUMIDITY_BIT;
        sensorFlags |= SCD30_CO2_BIT;
    }

}
void Sensors::initRainSensor() {
	pinMode(RAIN_PWR_PIN, OUTPUT);
	pinMode(RAIN_PIN, INPUT);
	// Initially keep the sensor OFF
	digitalWrite(RAIN_PWR_PIN, LOW);
    sensorFlags |= RAIN_BIT;
}
void Sensors::initWindSensor() {
    sensorFlags |= WINDSPEED_BIT;
}
void Sensors::initSoilSensors() {

	pinMode(SOIL_HUMIDITY_PWR_PIN, OUTPUT);
	pinMode(SOIL_HUMIDITY_PIN, INPUT);
	// Initially keep the sensor OFF
	digitalWrite(SOIL_HUMIDITY_PWR_PIN, LOW);

    sensorFlags |= SOIL_HUMIDITY_BIT;
    soilTempSensor.begin();
    delay(10);
    if(soilTempSensor.getDeviceCount() > 0){
        sensorFlags |= SOIL_TEMPERATURE_BIT;
    }
}
void Sensors::initLightSensor() {
    sensorFlags |= LIGHT_BIT;
}

float Sensors::mapfloat(float x, float in_min, float in_max, float out_min, float out_max)
{
    return (x - in_min) * (out_max - out_min) / (in_max - in_min) + out_min;
}
int Sensors::readSensorsAndSend() {
    float value;
    int messageCount = 0; 
    
    
    if (sensorFlags & BAROMETER_BIT && messageCount < messageArraySize) {
        value = readBarometer();
        messages[messageCount++] = sendSensorData((uint8_t) SENSOR_TYPE_BAROMETER,(uint16_t)  value * 100);
    }
    if (sensorFlags & SCD30_TEMPERATURE_BIT && scd30.dataAvailable() && messageCount < messageArraySize) {
        value = readSCD30Temperature();
        messages[messageCount++] = sendSensorData((uint8_t) SENSOR_TYPE_SCD30_TEMPERATURE,(uint16_t)  value * 100);
    }
    if (sensorFlags & SCD30_HUMIDITY_BIT && scd30.dataAvailable() && messageCount < messageArraySize) {
        value = readSCD30Humidity();
        messages[messageCount++] = sendSensorData((uint8_t) SENSOR_TYPE_SCD30_HUMIDITY,(uint16_t)  value * 100);
    }
    if (sensorFlags & SCD30_CO2_BIT && scd30.dataAvailable() && messageCount < messageArraySize) {
        value = readSCD30CO2();
        messages[messageCount++] = sendSensorData((uint8_t) SENSOR_TYPE_SCD30_CO2,(uint16_t)  value * 100);
    }
    if (sensorFlags & RAIN_BIT && messageCount < messageArraySize) {
        value = readRain();
        messages[messageCount++] = sendSensorData((uint8_t) SENSOR_TYPE_RAIN, (uint16_t) value * 100);
    }
    if (sensorFlags & WINDSPEED_BIT && messageCount < messageArraySize) {
        value = readWindSpeed();
        messages[messageCount++] = sendSensorData((uint8_t) SENSOR_TYPE_WINDSPEED, (uint16_t) value * 100);
    }
    if (sensorFlags & SOIL_TEMPERATURE_BIT && messageCount < messageArraySize) {
        value = readSoilTemperature();
        messages[messageCount++] = sendSensorData((uint8_t) SENSOR_TYPE_SCD30_TEMPERATURE, (uint16_t) value * 100);
    }
    if (sensorFlags & SOIL_HUMIDITY_BIT && messageCount < messageArraySize) {
        value = readSoilHumidity();
        messages[messageCount++] = sendSensorData((uint8_t) SENSOR_TYPE_SCD30_HUMIDITY, (uint16_t) value * 100);
    }
    
    if (sensorFlags & LIGHT_BIT) {
        value = readLight();
        messages[messageCount++] = sendSensorData((uint8_t) SENSOR_TYPE_LIGHT_DIODE, (uint16_t) value * 100);
    }
    return messageCount;
}
 
char* Sensors::generateMessageID() {
    static char id[10];  // 9 characters + null terminator
    const char* charset = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";

    for(int i = 0; i < 9; i++) {
        id[i] = charset[random(0, 62)];  // 62 possible alphanumeric characters
    }
    id[9] = '\0';  // Null terminate the string

    return id;
}

Message Sensors::sendSensorData(uint8_t sensorType, uint16_t value) {
    Message msg;
    msg.sensorType = sensorType;
    msg.sensorValue = value;
    msg.type = MESSAGE_TYPE_SENSOR_DATA;
    msg.senderID = NODE_ID;
    strncpy(msg.id, generateMessageID(), sizeof(msg.id));
    msg.targetID = MASTER_NODE_ID;
    msg.hops = 0;
    return msg; 
}

float Sensors::readBarometer() {
    return bme.readPressure();
}
float Sensors::readSCD30Temperature() { 
    return scd30.getTemperature();
}
float Sensors::readSCD30Humidity() {
    return scd30.getHumidity();
}
float Sensors::readSCD30CO2() {
    return scd30.getCO2();
}
float Sensors::readRain() {
	digitalWrite(RAIN_PWR_PIN, HIGH);
	delay(10);					
	float val = digitalRead(RAIN_PIN);
	digitalWrite(RAIN_PWR_PIN, LOW);
	return val;		
}
float Sensors::readWindSpeed() {
    float sensorValue = analogRead(WIND_PIN);
    float voltage = (sensorValue / 1023) * 5;
    float wind_speed = mapfloat(voltage, 0.4, 2, 0, 32.4);
    float speed_kph = ((wind_speed *3600)); 
    return speed_kph;
    
}
float Sensors::readSoilTemperature() {
    soilTempSensor.getDeviceCount();
    soilTempSensor.requestTemperatures();
    float temperature = soilTempSensor.getTempCByIndex(0);
    return  temperature;
}
float Sensors::readSoilHumidity() {
	digitalWrite(SOIL_HUMIDITY_PWR_PIN, HIGH);
	delay(10);		
    float sensorValue = analogRead(SOIL_HUMIDITY_PIN);
	digitalWrite(SOIL_HUMIDITY_PWR_PIN, LOW);
    return sensorValue;
}
float Sensors::readLight() {
    return analogRead(LIGHT_PIN);
}