WifiControlSensor/BME680.h

@@ -14,8 +14,6 @@
 //Use Default i2c pin GPIO4(D2): SDA, GPIO5(D1):SCL
 
 #define SEALEVELPRESSURE_HPA (1013.25)
-#include <SFE_BMP180.h>
-#include "debug_sketch.h"
 
 int BME680GetMeasure(float &t, float &p, float &h, float &g, float &a);
 int BME680Setup();

WifiControlSensor/MQTT.h

@@ -21,6 +21,9 @@
 #define TELEINFO_IINST_FEED_FORMAT     "/feeds/%s/%s/teleinfo/iinst"
 #define TELEINFO_PAPP_FEED_FORMAT     "/feeds/%s/%s/teleinfo/papp"
 #define TELEINFO_BASE_FEED_FORMAT     "/feeds/%s/%s/teleinfo/base"
+#define SCD4X_TEMPERATURE_FEED_FORMAT "/feeds/%s/%s/scd4x/temperature"
+#define SCD4X_HUMIDITY_FEED_FORMAT    "/feeds/%s/%s/scd4x/humidity"
+#define SCD4X_CO2_FEED_FORMAT         "/feeds/%s/%s/scd4x/co2"
 #ifndef CONFIG_DISABLE_MQTT
 #include "Adafruit_MQTT.h"
 

WifiControlSensor/SCD4X.h

@@ -0,0 +1,23 @@
+#pragma once
+#ifdef CONFIG_ENABLE_SCD4X
+#include "debug_sketch.h"
+
+int SCD4XGetMeasure(float &t, float &h, uint16_t &co2);
+int SCD4XSetup();
+bool SCD4XIsConnected();
+
+#else
+int SCD4XGetMeasure(float &, float &, uint16_t &)
+{
+        return -1;
+};
+int SCD4XSetup()
+{
+        SKETCH_DEBUG_PRINTLN("SCD4X is disabled at build time");
+        return -1;
+};
+bool SCD4XIsConnected()
+{
+        return false;
+};
+#endif

WifiControlSensor/SCD4X.ino

@@ -0,0 +1,61 @@
+#ifdef CONFIG_ENABLE_SCD4X
+#include "SCD4X.h"
+#include <Arduino.h>
+#include <SensirionI2CScd4x.h>
+#include <Wire.h>
+
+SensirionI2CScd4x scd4x;
+
+int SCD4XConnected = 0;
+
+int SCD4XSetup()
+{
+    Wire.begin();
+    scd4x.begin(Wire);
+
+    // Stop previous measurement
+    uint16_t error = scd4x.stopPeriodicMeasurement();
+    if (error) {
+        SKETCH_DEBUG_PRINTLN("Cannot connect to SCD4X");
+        return -1;
+    }
+
+    // Start new measurement
+    error = scd4x.startPeriodicMeasurement();
+    if (error) {
+        SKETCH_DEBUG_PRINTLN("Cannot start measurement for SCD4X");
+        return -1;
+    }
+    SCD4XConnected = 1;
+
+    return 0;
+}
+int SCD4XGetMeasure(float &temperature, float &humidity, uint16_t &co2)
+{
+    // Read Measurement
+    bool isDataReady = false;
+
+    uint16_t error = scd4x.getDataReadyFlag(isDataReady);
+    if (error) {
+        SKETCH_DEBUG_PRINTLN("Error trying to execute getDataReadyFlag() for SCD4X ");
+        return -1;
+    }
+    if (!isDataReady) {
+        return -1;
+    }
+    error = scd4x.readMeasurement(co2, temperature, humidity);
+    if (error || co2 == 0) {
+        char errorMsg[256];
+        SKETCH_DEBUG_PRINT("Error with reading measurement. Error : ");
+        errorToString(error, errorMsg, sizeof(errorMsg));
+        SKETCH_DEBUG_PRINTF(" Co2: %d\n", co2);
+
+        return -1;
+    }
+    return 0;
+}
+bool SCD4XIsConnected()
+{
+    return SCD4XConnected != 0;
+}
+#endif

WifiControlSensor/WebServer.ino

@@ -37,6 +37,9 @@ void WebHandleRoot() {
 #ifdef CONFIG_ENABLE_DHT
               "" + (DHTIsConnected() ? "<h6>DHT</h6>Temperature " + String(dhtTemp, 0) + "C<br/> Humidity " + String(dhtHumidity, 0) + "%<br/>" : "DHT Disconnected"  ) + ""
 #endif
+#ifdef CONFIG_ENABLE_SCD4X
+              "" + (SCD4XIsConnected() ? "<h6>SCD4X</h6>Temperature " + String(SCD4xT, 0) + "C<br/> Humidity " + String(SCD4xH, 0) + "%<br/> CO2 " + String(SCD4xCo2) + "ppm<br/>" : "SCD4X Disconnected"  ) + ""
+#endif
 #ifdef CONFIG_ENABLE_BME680
               "" + (BME680IsConnected() ? "<h6>BME680</h6>Temperature " + String(bme680T, 2) + "C<br/> Pressure " + String(bme680P, 2) + "hPa<br/> Humidity " + String(bme680H, 2) + "%<br/> Gaz " +  String(bme680G, 2) + "kOhm<br/>" : "BME680 Disconnected"  ) + ""
 #endif

WifiControlSensor/WifiControlSensor.ino

@@ -53,6 +53,7 @@
 #include "Adafruit_MQTT_Client.h"
 #include "EEPROM.h"
 #include "Teleinfo.h"
+#include "SCD4X.h"
 
 extern "C" {
 #include <user_interface.h>
@@ -68,6 +69,8 @@ float dhtTemp, dhtHumidity;
 float bme680T, bme680P, bme680H, bme680G, bme680A;
 float bme680BSECT, bme680BSECP, bme680BSECH, bme680BSECIaq, bme680BSECIaqAcc;
 float teleIinst, telePapp, teleBase;
+float SCD4xT, SCD4xH;
+uint16_t SCD4xCo2;
 int dryness;
 uint8_t mode;
 int reconfig = 0;
@@ -296,6 +299,9 @@ void setup()
     if(!TeleinfoSetup()){
       SKETCH_DEBUG_PRINTLN("Teleinfo init success");
     }
+    if(!SCD4XSetup()){
+      SKETCH_DEBUG_PRINTLN("SCD4X init success");
+    }
     WebSetupServer(mode);
   }
   samplingPeriod = conf.samplingPeriod;
@@ -334,6 +340,12 @@ void loop() {
         batchInfo.push_back({dhtTemp, TEMPERATURE_DHT_FEED_FORMAT, 0, 0});
         batchInfo.push_back({dhtHumidity, HUMIDITY_DHT_FEED_FORMAT, 0, 0});
       }
+      if (!SCD4XGetMeasure(SCD4xT, SCD4xH, SCD4xCo2)) {
+        SKETCH_DEBUG_PRINTF("Current %f°C %f Humidity, Current C02 %d\n", SCD4xT, SCD4xH, SCD4xCo2);
+        batchInfo.push_back({SCD4xT, SCD4X_TEMPERATURE_FEED_FORMAT, 0, 0});
+        batchInfo.push_back({SCD4xH, SCD4X_HUMIDITY_FEED_FORMAT, 0, 0});
+        batchInfo.push_back({(float)SCD4xCo2, SCD4X_CO2_FEED_FORMAT, 0, 0});
+      }
       if (!DryGetMeasure(dryness)) {
         SKETCH_DEBUG_PRINTF("Current dryness %d %%\n", (dryness * 100) / 1024);
         batchInfo.push_back({(float)dryness, DRY_FEED_FORMAT, 0, 0});

WifiControlSensor/config_device.h

@@ -36,6 +36,9 @@
 //If the dry sensor is powered by a GPIO, this GPIO could be defined here
 //#define CONFIG_DRY_POWER_PIN 13
 
+//Advised CONFIG_SAMPLING_PERIOD_MS is 5s for this sensor
+//#define CONFIG_ENABLE_SCD4X
+
 // Enable light sleep to save some power (http://bbs.espressif.com/viewtopic.php?f=6&t=133&p=485&hilit=sleep+modem#p485)
 #define CONFIG_ENABLE_POWER_SAVE