Implement initial firmware version of envisens

This commit is contained in:
bzi 2019-02-21 18:53:43 +01:00
parent 5900a8384e
commit 1df37cb910
2 changed files with 73 additions and 0 deletions

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/* Macrocell environmental sensor project EnviSens
*
* This firmware provides features to use an ATMEGA µC as an environmental sensor provider.
* Currently supported sensors:
* - digital pin D2: DHT22 temperature and humidity sensor
* - analog pin A0: MQ135 gas and air quality sensor
*
* (C) 2019 Macrocell - Environmental Sensing Solutions (MESS)
* proudly presented by Macrocell - FPGA Innovators
*/
#include <Wire.h>
#include "DHT.h"
#include "configuration.h"
#define MQ135_PIN A0
#define DHT_PIN 2 // Digital pin connected to the DHT sensor
#define DHT_TYPE DHT22 // DHT 22 (AM2302), AM2321
DHT dht(DHT_PIN, DHT_TYPE);
int sensorValue;
long last_sample = 0;
void setup() {
Serial.begin(SERIAL_BAUDRATE);
pinMode(MQ135_PIN, INPUT);
pinMode(LED_BUILTIN, OUTPUT);
digitalWrite(LED_BUILTIN, LOW);
dht.begin();
}
void loop() {
long now = millis();
if (now - last_sample > OPERATION_PERIOD / 2) {
if (OPERATION_BLINK_EN) {digitalWrite(LED_BUILTIN, LOW);}
}
if (now - last_sample > OPERATION_PERIOD) {
last_sample = now;
if (OPERATION_BLINK_EN) {digitalWrite(LED_BUILTIN, HIGH);}
float h = dht.readHumidity();
float t = dht.readTemperature();
if (isnan(h) || isnan(t)) {
Serial.println(F("Failed to read from DHT sensor!"));
} else {
float hi = dht.computeHeatIndex(t, h, false);
Serial.print(F("Humidity: "));
Serial.print(h);
Serial.print(F("% Temperature: "));
Serial.print(t);
Serial.print(F("°C Heat index: "));
Serial.print(hi);
Serial.println(F("°C "));
}
sensorValue = analogRead(MQ135_PIN);
Serial.print("AirQuality=");
Serial.print(sensorValue, DEC);
Serial.println(" PPM");
}
}

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/* Macrocell environmental sensor project EnviSens
*
* This header provides the necessary configurations for the ATMEGA firmware.
*
* (C) 2019 Macrocell - Environmental sensing solutions
* proudly presented by Macrocell - FPGA Innovators
*/
#define SERIAL_BAUDRATE 115200
#define OPERATION_BLINK_EN true // blink continuously if in correct operation
#define OPERATION_PERIOD 2000 // sensor reading period in milliseconds