UVSensor.ino

/*
 * The MySensors Arduino library handles the wireless radio link and protocol
 * between your home built sensors/actuators and HA controller of choice.
 * The sensors forms a self healing radio network with optional repeaters. Each
 * repeater and gateway builds a routing tables in EEPROM which keeps track of the
 * network topology allowing messages to be routed to nodes.
 *
 * Created by Henrik Ekblad <[email protected]>
 * Copyright (C) 2013-2019 Sensnology AB
 * Full contributor list: https://github.com/mysensors/MySensors/graphs/contributors
 *
 * Documentation: http://www.mysensors.org
 * Support Forum: http://forum.mysensors.org
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * version 2 as published by the Free Software Foundation.
 *
 *******************************
 *
 * REVISION HISTORY
 * Version 1.0 - epierre
 * Contribution: bulldoglowell, gizmocuz
 *
 * DESCRIPTION
 * Arduino UVM-30A
 * Index table taken from: http://www.elecrow.com/sensors-c-111/environment-c-111_112/uv-sensor-moduleuvm30a-p-716.html
 * Because this table is pretty lineair, we can calculate a UVI with one decimal
 *
 * Connect sensor:
 *
 *   +   >>> 5V
 *   -   >>> GND
 *   out >>> A0
 *
 * License: Attribution-NonCommercial-ShareAlike 3.0 Unported (CC BY-NC-SA 3.0)
 */
 
// Enable debug prints to serial monitor
#define MY_DEBUG
 
// Enable and select radio type attached
#define MY_RADIO_RF24
//#define MY_RADIO_NRF5_ESB
//#define MY_RADIO_RFM69
//#define MY_RADIO_RFM95
 
#include <MySensors.h>
 
#define UV_SENSOR_ANALOG_PIN 0
 
#define CHILD_ID_UV 0
 
uint32_t SLEEP_TIME = 30*1000; // Sleep time between reads (in milliseconds)
 
MyMessage uvMsg(CHILD_ID_UV, V_UV);
 
uint32_t lastSend =0;
float uvIndex;
float lastUV = -1;
uint16_t uvIndexValue [12] = { 50, 227, 318, 408, 503, 606, 696, 795, 881, 976, 1079, 1170};
 
 
void presentation()
{
    // Send the sketch version information to the gateway and Controller
    sendSketchInfo("UV Sensor", "1.2");
 
    // Register all sensors to gateway (they will be created as child devices)
    present(CHILD_ID_UV, S_UV);
}
 
void loop()
{
    uint32_t currentTime = millis();
 
    uint16_t uv = analogRead(UV_SENSOR_ANALOG_PIN);// Get UV value
    if (uv>1170) {
        uv=1170;
    }
 
    //Serial.print("UV Analog reading: ");
    //Serial.println(uv);
 
    int i;
    for (i = 0; i < 12; i++) {
        if (uv <= uvIndexValue[i]) {
            uvIndex = i;
            break;
        }
    }
 
    //calculate 1 decimal if possible
    if (i>0) {
        float vRange=uvIndexValue[i]-uvIndexValue[i-1];
        float vCalc=uv-uvIndexValue[i-1];
        uvIndex+=(1.0/vRange)*vCalc-1.0;
    }
 
    //Serial.print("UVI: ");
    //Serial.println(uvIndex,2);
 
    //Send value to gateway if changed, or at least every 5 minutes
    if ((uvIndex != lastUV)||(currentTime-lastSend >= 5UL*60UL*1000UL)) {
        lastSend=currentTime;
        send(uvMsg.set(uvIndex,2));
        lastUV = uvIndex;
    }
 
    sleep(SLEEP_TIME);
}