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