From d078d7a69973dbd320503c2b4303782fa042f57e Mon Sep 17 00:00:00 2001
From: Jaro <jaro@ttx.sk>
Date: Tue, 24 Nov 2020 20:44:08 +0100
Subject: [PATCH] Mqtt + bme280

---
 platformio.ini |  5 ++--
 src/main.cpp   | 73 +++++++++++++++++++++++++++++++++++++++++---------
 2 files changed, 63 insertions(+), 15 deletions(-)

diff --git a/platformio.ini b/platformio.ini
index ba62067..9e622dc 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -8,9 +8,9 @@
 ; Please visit documentation for the other options and examples
 ; https://docs.platformio.org/page/projectconf.html
 
-[env:ttgo-t1]
+[env:esp32doit-devkit-v1]
 platform = espressif32
-board = ttgo-t1
+board = esp32doit-devkit-v1
 framework = arduino
 monitor_port = COM[1367]
 monitor_speed = 115200
@@ -27,3 +27,4 @@ lib_deps =
 	aharshac/StringSplitter@^1.0.0
 	sstaub/NTP@^1.4
 	aster94/Utilities@^0.4.6
+	adafruit/Adafruit BME280 Library@^2.1.2
diff --git a/src/main.cpp b/src/main.cpp
index 49369e0..8bcecd4 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -1,3 +1,7 @@
+#include <Wire.h>
+#include <Adafruit_Sensor.h>
+#include <Adafruit_BME280.h>
+
 #include <WiFi.h>
 #include <SPI.h>
 #include <FastLED.h>
@@ -25,9 +29,11 @@
 #define PSTR // Make Arduino Due happy
 #endif
 
+Adafruit_BME280 bme; // I2C
+
 #define COMMAND_PARAMETER_LENGTH 30
 #define MAX_TIMES_SCROLLED 5
-#define PIN 27
+#define PIN 13
 
 WiFiClient espClient;
 PubSubClient client(espClient);
@@ -125,6 +131,8 @@ void wifiConnected()
   needMqttConnect = true;
 }
 
+#define SEALEVELPRESSURE_HPA (1027.3)
+
 void setup()
 {
   Serial.begin(115200);
@@ -159,6 +167,36 @@ void setup()
   scroller.SetColors(colors);
   scroller.SetMatrix(matrix);
   
+  Serial.println(F("BME280 test"));
+
+  if (! bme.begin(0x76, &Wire)) {
+      Serial.println("Could not find a valid BME280 sensor, check wiring!");
+  }
+
+  Serial.println("-- Default Test --");
+  Serial.println("normal mode, 16x oversampling for all, filter off,");
+  
+  bme.takeForcedMeasurement(); // has no effect in normal mode
+
+  Serial.print("Temperature = ");
+  Serial.print(bme.readTemperature());
+  Serial.println(" *C");
+
+  Serial.print("Pressure = ");
+
+  Serial.print(bme.readPressure() / 100.0F);
+  Serial.println(" hPa");
+
+  Serial.print("Approx. Altitude = ");
+  Serial.print(bme.readAltitude(SEALEVELPRESSURE_HPA));
+  Serial.println(" m");
+
+  Serial.print("Humidity = ");
+  Serial.print(bme.readHumidity());
+  Serial.println(" %");
+
+  Serial.println();
+
 }
 
 void handleRoot()
@@ -189,6 +227,7 @@ boolean reconnect() {
     Serial.println("connected");
     // Once connected, publish an announcement...
     client.subscribe("home/scroller");
+    client.subscribe("get/home/sensor/decka/bme280");
     return true;
   } else {
     Serial.print("failed, rc=");
@@ -241,19 +280,27 @@ 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]);
+
+  if (String("home/scroller") == String(topic)) {
+
+    for (int i = 0; i < length; i++) {
+      Serial.print((char)payload[i]);
+    }
+    Serial.println();
+
+    strncpy(msg,(char *)payload,length);
+    msg[length] = '\0';
+
+    // Switch on the LED if an 1 was received as first character
+    scroller.TurnOff();
+    scroller.DeleteLines();
+    decode_payload(msg);
+    showTextMqtt = true;
+  } else if (String("get/home/sensor/decka/bme280") == String(topic)) {
+    client.publish("home/sensor/decka/bme280/temperature",(String("N:") + String(bme.readTemperature())).c_str());
+    client.publish("home/sensor/decka/bme280/humidity",(String("N:") + String(bme.readHumidity())).c_str());
+    client.publish("home/sensor/decka/bme280/pressure",(String("N:") + String(bme.readPressure() / 100.0F)).c_str());
   }
-  Serial.println();
-
-  strncpy(msg,(char *)payload,length);
-  msg[length] = '\0';
-
-  // Switch on the LED if an 1 was received as first character
-  scroller.TurnOff();
-  scroller.DeleteLines();
-  decode_payload(msg);
-  showTextMqtt = true;
 }
 
 void loop()