Add collection.ino

collection.ino

@@ -0,0 +1,151 @@
+#include <PubSubClient.h>
+#include <rpcWiFi.h>
+#include <TFT_eSPI.h>
+#include "sensirion_common.h"
+#include "sgp30.h"
+
+#define WIFISSID "REDACTED" // Put your WifiSSID here
+#define PASSWORD "REDACTED" // Put your wifi password here
+#define TOKEN "REDACTED" // Put your Ubidots' TOKEN
+#define VARIABLE_LABEL1 "voc" // Assign the variable label
+#define VARIABLE_LABEL2 "co2"
+#define DEVICE_LABEL "co2-monitor-device" // Assign the device label
+#define MQTT_CLIENT_NAME "REDACTED" // MQTT client Name
+
+const long interval = 100;
+unsigned long previousMillis = 0;
+
+char mqttBroker[] = "industrial.api.ubidots.com";
+
+WiFiClient wifiClient;
+PubSubClient client(wifiClient);
+
+TFT_eSPI tft = TFT_eSPI();
+
+static unsigned short int VOC = 0;
+static unsigned short int CO2 = 0;
+
+// Space to store values to send
+char str_voc[6];
+char str_co2[6];
+char payload[700];
+char topic[150];
+
+void callback(char* topic, byte* payload, unsigned int length){
+  Serial.print("Message arrived [");
+  Serial.print(topic);
+  Serial.print("] ");
+  for (int i=0;i<length;i++) {
+    Serial.print((char)payload[i]);
+  }
+}
+
+void reconnect() {
+  // Loop until we're reconnected
+  while (!client.connected()) {
+    Serial.println("Attempting MQTT connection...");
+
+  // Attempt to connect
+  if (client.connect(MQTT_CLIENT_NAME, TOKEN,"")) {
+    Serial.println("connected");
+  }
+  else {
+    Serial.print("failed, rc=");
+    Serial.print(client.state());
+    Serial.println(" try again in 2 seconds");
+    // Wait 2 seconds before retrying
+    delay(2000);
+    }
+  }
+}
+
+void read_sgp30()
+{
+  s16 err = 0;
+  sgp_measure_iaq_blocking_read(&VOC, &CO2);
+  if (err == STATUS_OK) {
+      Serial.print("tVOC  Concentration:");
+      Serial.print(VOC);
+      Serial.println("ppb");
+
+      Serial.print("CO2eq Concentration:");
+      Serial.print(CO2);
+      Serial.println("ppm");
+  } else {
+      Serial.println("error reading IAQ values\n");
+  }
+}
+
+void send_data()
+{
+  dtostrf(VOC, 4, 0, str_voc);
+  dtostrf(CO2, 4, 0, str_co2);
+  
+  if (!client.connected()) {
+    reconnect();
+  }
+  
+  // Builds the topic
+  sprintf(topic, "%s", ""); // Cleans the topic content
+  sprintf(topic, "%s%s", "/v2.0/devices/", DEVICE_LABEL);
+
+  //Builds the payload
+  sprintf(payload, "%s", ""); // Cleans the payload
+  sprintf(payload, "{\"%s\":", VARIABLE_LABEL1); // Adds the variable label
+  sprintf(payload, "%s%s", payload, str_voc); // Adds the value
+  sprintf(payload, "%s}", payload); // Closes the dictionary brackets
+  client.publish(topic, payload);
+  Serial.println(payload);
+  delay(500);
+
+  sprintf(payload, "%s", ""); // Cleans the payload
+  sprintf(payload, "{\"%s\":", VARIABLE_LABEL2); // Adds the variable label
+  sprintf(payload, "%s%s", payload, str_co2); // Adds the value
+  sprintf(payload, "%s}", payload); // Closes the dictionary brackets
+  client.publish(topic, payload);
+  Serial.println(payload);
+  delay(500);
+
+  client.loop();
+}
+
+void setup() {
+  Serial.begin(115200);
+  while (sgp_probe() != STATUS_OK) {
+      Serial.println("SGP failed");
+  }
+  sgp_set_absolute_humidity(13000);
+  sgp_iaq_init();
+
+  tft.begin();
+  tft.setRotation(3);
+  tft.setTextSize(2);
+  tft.fillScreen(TFT_BLACK);
+  
+//  while(!Serial);
+
+  // Set WiFi to station mode and disconnect from an AP if it was previously connected
+  WiFi.mode(WIFI_STA);
+  WiFi.disconnect();
+  
+  tft.drawString("Connecting to WiFi...",20,120);
+  WiFi.begin(WIFISSID, PASSWORD);
+  
+  while (WiFi.status() != WL_CONNECTED) {
+    delay(500);
+    WiFi.begin(WIFISSID, PASSWORD);
+  }
+  
+  tft.fillScreen(TFT_BLACK);
+  tft.drawString("Connected to the WiFi",20,120);
+
+  delay(1000);
+  client.setServer(mqttBroker, 1883);
+  client.setCallback(callback);
+}
+
+void loop() {
+  read_sgp30();    //Reading sgp30 sensor values
+  send_data();     //Sending data to Ubidots
+  delay(2000);
+}