From 23a3bc2cb23820c24f0ee31414ec9a5ed8208a9c Mon Sep 17 00:00:00 2001
From: Sietse Jonker <sietse.jonker@hva.nl>
Date: Wed, 14 Feb 2024 14:07:53 +0100
Subject: [PATCH] Add Arduino code for environmental monitoring

---
 arduino/node-code/node-code-final.ino | 98 +++++++++++++++++++++++++++
 1 file changed, 98 insertions(+)

diff --git a/arduino/node-code/node-code-final.ino b/arduino/node-code/node-code-final.ino
index e69de29..ecaa647 100644
--- a/arduino/node-code/node-code-final.ino
+++ b/arduino/node-code/node-code-final.ino
@@ -0,0 +1,98 @@
+// Sietse Jonker
+// 09/02/2024
+
+#include <Wire.h>
+#include <Adafruit_SH110X.h>
+#include <Adafruit_SGP30.h>
+#include <DHT.h>
+
+#define MICPIN 6
+#define DHTPIN 7
+#define SCL 9
+#define SDA 8
+#define DHTTYPE DHT11
+#define SCREEN_WIDTH 128
+#define SCREEN_HEIGHT 64
+#define i2c_adress 0x3c
+
+Adafruit_SH1106G display = Adafruit_SH1106G(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire);
+DHT dht(DHTPIN, DHTTYPE);
+
+Adafruit_SGP30 sgp;
+
+uint16_t TVOC_base, eCO2_base;
+int counter = 0;
+float temperature = 0;
+float humidity = 0;
+int eCO2 = 0;
+int TVOC = 0;
+bool noise = false;
+
+void resetValues() {
+  TVOC_base, eCO2_base;
+  counter = 0;
+  temperature = 0;
+  humidity = 0;
+  eCO2 = 0;
+  TVOC = 0;
+  noise = false;
+}
+
+void displayData() {
+  // clear display for new info
+  display.clearDisplay();
+
+  // set custom text properties
+  display.setTextSize(2);
+  display.setTextColor(SH110X_WHITE);
+  display.setCursor(0, 0);
+
+  // display info on oled screen
+  display.println((String) "Temp: " + int(temperature) + "C" + '\n'
+    + "Humi: " + int(humidity) + "%" + '\n'
+    + "eCO2: " + int(sgp.eCO2) + '\n'
+    + "TVOC: " + int(sgp.TVOC));
+                  
+  display.display();
+}
+
+void setup() {
+  Serial.begin(115200);
+
+  // tell display what settings to use
+  display.begin(i2c_adress, true);
+  display.clearDisplay();
+
+  // tell sensors to start reading
+  dht.begin();
+  sgp.begin();
+
+  pinMode(MICPIN, INPUT);
+  pinMode(DHTPIN, INPUT);
+
+  resetValues();
+}
+
+void loop() {
+  // if sensor doesnt work print in serialmonitor
+  if (!sgp.IAQmeasure()) {
+    Serial.println("SGP30: BAD");
+    return;
+  } else {
+    Serial.println("SGP30: OK");
+  }
+
+  // read dht11 sensor
+  temperature = float(dht.readTemperature());
+  humidity = float(dht.readHumidity());
+
+  // display sensordata on oled screen
+  displayData();
+
+  // get new baseline every 30 seconds
+  if (counter == 30) {
+    sgp.getIAQBaseline(&eCO2_base, &TVOC_base);
+  }
+  delay(1000);
+  counter++;
+}
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