134 lines
2.9 KiB
C++
134 lines
2.9 KiB
C++
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#include <Wire.h>
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#include <SPI.h>
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#include <Adafruit_Sensor.h>
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#include <Adafruit_BMP280.h>
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#include <WiFi.h>
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#include <PubSubClient.h>
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#define BMP_SCK 13
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#define BMP_MISO 12
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#define BMP_MOSI 11
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#define BMP_CS 10
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#define ALT_BMP280_ADDRESS (0x76)
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Adafruit_BMP280 bme; // I2C
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const char* networkName = "W1ztM.4omNj";
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const char* networkPswd = "MPReoa43";
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const char* mqtt_server = "192.168.1.156";
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const int LED_PIN = 13;
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WiFiClient espClient;
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PubSubClient client(espClient);
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void setup() {
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// put your setup code here, to run once:
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Serial.begin(115200);
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pinMode(LED_PIN, OUTPUT);
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// Connect to the WiFi network (see function below loop)
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InitTempSensor();
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connectToWiFi(networkName, networkPswd);
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digitalWrite(LED_PIN, LOW); // LED off
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client.setServer(mqtt_server, 1883);
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}
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void connectToWiFi(const char * ssid, const char * pwd)
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{
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int ledState = 0;
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printLine();
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Serial.println("Connecting to WiFi network: " + String(ssid));
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WiFi.begin(ssid, pwd);
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while (WiFi.status() != WL_CONNECTED)
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{
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// Blink LED while we're connecting:
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digitalWrite(LED_PIN, ledState);
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ledState = (ledState + 1) % 2; // Flip ledState
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delay(500);
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Serial.print(".");
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}
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Serial.println();
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Serial.println("WiFi connected!");
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Serial.print("IP address: ");
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Serial.println(WiFi.localIP());
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}
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void InitTempSensor() {
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if (!bme.begin(ALT_BMP280_ADDRESS)) {
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Serial.println("Could not find a valid BMP280 sensor, check wiring!");
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int ledState = 0;
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while (1) {
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digitalWrite(LED_PIN, ledState);
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ledState = (ledState + 1) % 2; // Flip ledState
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delay(100);
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}
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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.print("Attempting MQTT connection...");
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// Attempt to connect
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if (client.connect("ESP32Client")) {
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digitalWrite(LED_PIN, LOW);
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Serial.println("connected");
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client.subscribe("bedroomTemp");
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} else {
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digitalWrite(LED_PIN, HIGH);
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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 5 seconds");
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// Wait 5 seconds before retrying
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delay(5000);
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}
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}
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}
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void printLine()
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{
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Serial.println();
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for (int i = 0; i < 30; i++)
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Serial.print("-");
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Serial.println();
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}
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void loop() {
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// put your main code here, to run repeatedly:
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if (!client.connected()) {
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reconnect();
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}
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client.loop();
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char szEventInfo[64];
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float tempReading = bme.readTemperature();
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float presReading = bme.readPressure() / 100.0;
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Serial.print("Temperature = ");
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Serial.print(tempReading);
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Serial.println(" *C");
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Serial.print("Pressure = ");
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Serial.print(presReading);
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Serial.println(" mBar");
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String strTemp = "{\"temp\":" + String(tempReading, 2) + "}";
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strTemp.toCharArray(szEventInfo, 64);
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Serial.print("Publish message: ");
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Serial.println(szEventInfo);
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client.publish("bedroomTemp", szEventInfo);
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delay(10000);
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}
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