@DTTerastar Add support for SHT30 i2c sensor #591 (#591)

platformio.ini

@@ -77,6 +77,7 @@ lib_deps =
 	adafruit/Adafruit BME280 Library@^2.2.2
 	adafruit/Adafruit BMP085 Library@^1.2.1
 	adafruit/Adafruit BMP280 Library@^2.6.3
+	adafruit/Adafruit SHT31 Library@^2.2.0
 	adafruit/Adafruit TSL2561@^1.1.0
 
 [env:esp32]

src/SHT30.cpp

@@ -0,0 +1,83 @@
+#ifdef SENSORS
+#include "SHT30.h"
+
+#include "globals.h"
+#include "mqtt.h"
+#include "defaults.h"
+#include <AsyncWiFiSettings.h>
+#include "string_utils.h"
+
+#include <Adafruit_SHT31.h>
+
+namespace SHT30
+{
+    Adafruit_SHT31* sht30;
+    long SHT30_status;
+    String SHT30_I2c;
+    int SHT30_I2c_Bus;
+    unsigned long SHT30PreviousMillis = 0;
+    int sensorInterval = 60000;
+    bool initialized = false;
+
+    void Setup()
+    {
+        if (!I2C_Bus_1_Started && !I2C_Bus_2_Started) return;
+
+        sht30 = new Adafruit_SHT31(SHT30_I2c_Bus == 1 ? &Wire : &Wire1);
+        if (SHT30_I2c == "0x44") {
+            SHT30_status = sht30->begin(0x44);
+        } else if (SHT30_I2c == "0x45") {
+            SHT30_status = sht30->begin(0x45);
+        } else {
+            return;
+        }
+
+        if (!SHT30_status) {
+            Serial.println("[SHT30] Couldn't find a sensor, check your wiring and I2C address!");
+        } else {
+            initialized = true;
+        }
+    }
+
+    void ConnectToWifi()
+    {
+        AsyncWiFiSettings.html("h4", "SHT30/31 Temperature and Humidity Sensor");
+        SHT30_I2c_Bus = AsyncWiFiSettings.integer("SHT30_I2c_Bus", 1, 2, DEFAULT_I2C_BUS, "I2C Bus");
+        SHT30_I2c = AsyncWiFiSettings.string("SHT30_I2c", "", "I2C address (0x77)");
+    }
+
+    void SerialReport()
+    {
+        if (!I2C_Bus_1_Started && !I2C_Bus_2_Started) return;
+        if (SHT30_I2c.isEmpty()) return;
+        Serial.print("SHT30:       ");
+        Serial.println(SHT30_I2c + " on bus " + SHT30_I2c_Bus);
+    }
+
+    void Loop()
+    {
+        if (!I2C_Bus_1_Started && !I2C_Bus_2_Started) return;
+        if (!initialized) return;
+
+        if (SHT30PreviousMillis == 0 || millis() - SHT30PreviousMillis >= sensorInterval) {
+
+            float temperature = sht30->readTemperature();
+            float humidity = sht30->readHumidity();
+
+            mqttClient.publish((roomsTopic + "/sht30_temperature").c_str(), 0, 1, String(temperature).c_str());
+            mqttClient.publish((roomsTopic + "/sht30_humidity").c_str(), 0, 1, String(humidity).c_str());
+
+            SHT30PreviousMillis = millis();
+        }
+    }
+
+    bool SendDiscovery()
+    {
+        if (SHT30_I2c.isEmpty()) return true;
+
+        return sendSensorDiscovery("SHT30 Temperature", EC_NONE, "temperature", "°C")
+            && sendSensorDiscovery("SHT30 Humidity", EC_NONE, "humidity", "%");
+    }
+}
+
+#endif

src/SHT30.h

@@ -0,0 +1,14 @@
+#pragma once
+#ifdef SENSORS
+#include <ArduinoJson.h>
+
+namespace SHT30
+{
+    void ConnectToWifi();
+    void SerialReport();
+    bool SendDiscovery();
+    void Setup();
+    void Loop();
+}
+
+#endif

src/main.cpp

@@ -56,6 +56,7 @@ bool sendTelemetry(int totalSeen, int totalFpSeen, int totalFpQueried, int total
             && BME280::SendDiscovery()
             && BMP180::SendDiscovery()
             && BMP280::SendDiscovery()
+            && SHT30::SendDiscovery()
             && TSL2561::SendDiscovery()
             && HX711::SendDiscovery()
             && SensirionSGP30::SendDiscovery()
@@ -228,6 +229,7 @@ void setupNetwork()
     BME280::ConnectToWifi();
     BMP180::ConnectToWifi();
     BMP280::ConnectToWifi();
+    SHT30::ConnectToWifi();
     TSL2561::ConnectToWifi();
     HX711::ConnectToWifi();
     SensirionSGP30::ConnectToWifi();
@@ -267,6 +269,7 @@ void setupNetwork()
     BME280::SerialReport();
     BMP180::SerialReport();
     BMP280::SerialReport();
+    SHT30::SerialReport();
     TSL2561::SerialReport();
     HX711::SerialReport();
     SensirionSGP30::SerialReport();
@@ -587,6 +590,7 @@ void setup()
     BME280::Setup();
     BMP180::Setup();
     BMP280::Setup();
+    SHT30::Setup();
     TSL2561::Setup();
     HX711::Setup();
     SensirionSGP30::Setup();
@@ -611,6 +615,7 @@ void loop()
     BME280::Loop();
     BMP180::Loop();
     BMP280::Loop();
+    SHT30::Loop();
     TSL2561::Loop();
     HX711::Loop();
     SensirionSGP30::Loop();

src/main.h

@@ -34,6 +34,7 @@
 #include "BME280.h"
 #include "BMP180.h"
 #include "BMP280.h"
+#include "SHT30.h"
 #include "TSL2561.h"
 #include "HX711.h"
 #include "DHT.h"