bme280

README.md

@@ -41,10 +41,10 @@ CAD files (OpenSCAD) and source code included.
              A0      D0
             RSV   (5)D1 ----------------------- TXD
             RSV   (4)D2 ----------------------- RXD
-            RSV   (0)D3 -- BMP_SDA        .---- GND
+            RSV   (0)D3 -- BME_SDA        .---- GND
-            RSV   (2)D4 -- BMP_SCL        |     ...
+            RSV   (2)D4 -- BME_SCL        |     ...
-            RSV     3V3 -- BMP_VCC        | .--- 5V
+            RSV     3V3 -- BME_VCC        | .--- 5V
-            RSV   .-GND -- BMP_GND        | |   ...
+            RSV   .-GND -- BME_GND        | |   ...
             GND  =C= D5                   | |   ...
             3V3   '- D6 ------------.     | |
             GND      D7 -- DHT_DATA  \    +-| --------- GND
@@ -65,7 +65,7 @@ SDS011:
  - 
  - 
 
-DHT22:
+DHT22: (WARNING: This sensor has proven to be unreliable outdoors!)
  - VDD  -> 3V3
  - DATA -> D7
  -      ->

platformio.ini

@@ -43,7 +43,9 @@ build_flags =
 lib_deps =
   ArduinoJson
   Adafruit Unified Sensor
-  Adafruit BMP085 Unified
+;  Adafruit BMP085 Unified
+  adafruit/Adafruit BusIO
+  adafruit/Adafruit BME280 Library
   DHT sensor library
 ;  SDS011 sensor Library
 ;  https://github.com/Zanop/SDS011.git#more-sensor-modes

src/main.cpp

@@ -18,7 +18,7 @@ extern "C" {
 #include <Wire.h>
 #include <SPI.h>
 #include <Adafruit_Sensor.h>
-#include <Adafruit_BMP085_U.h>
+#include <Adafruit_BME280.h>
 #include <DHT.h>
 
 #include <RunningAverage.h>
@@ -66,8 +66,8 @@ uint32_t loop_count = 0;
 #define SENSOR8_ID "5a9eddb1f55bff001a51de52"
 
 
-static constexpr uint8_t BMP_SCL = D4;
+static constexpr uint8_t BME_SCL = D4;
-static constexpr uint8_t BMP_SDA = D3;
+static constexpr uint8_t BME_SDA = D3;
 
 static constexpr uint8_t DHT22_PIN = D7;
 static constexpr uint8_t DHTTYPE = DHT22; // DHT 22 (AM2302)
@@ -87,6 +87,7 @@ ADC_MODE(ADC_VCC);
 
 ESP8266WiFiMulti wifiMulti;
 
+WiFiClient wificlient;
 HTTPClient httpclient;
 BearSSL::WiFiClientSecure net;
 MQTTClient mqttclient(MQTT_MAX_PACKET_SIZE);
@@ -94,7 +95,10 @@ MQTTClient mqttclient(MQTT_MAX_PACKET_SIZE);
 os_timer_t Timer1;
 RunningAverage geigeraverage(10);
 
-Adafruit_BMP085_Unified bmp = Adafruit_BMP085_Unified(10085);
+Adafruit_BME280 bme; // use I2C interface
+//Adafruit_Sensor *bme_temp = bme.getTemperatureSensor();
+//Adafruit_Sensor *bme_pressure = bme.getPressureSensor();
+//Adafruit_Sensor *bme_humidity = bme.getHumiditySensor();
 DHT dht(DHT22_PIN, DHTTYPE);
 SdsDustSensor sds(SDS_TX, SDS_RX);
 volatile unsigned long geiger_counts = 0;
@@ -112,6 +116,7 @@ struct __attribute__((packed)) SENSOR_DATA {
   float humidity;
   float pressure;
   float temp2;
+  float humidity2;
   float p10;
   float p25;
   float cpm;
@@ -233,12 +238,18 @@ void ICACHE_FLASH_ATTR getValuesJSON(char* buffer, const size_t buf_len, int for
 void ICACHE_FLASH_ATTR sendValues() {
   unsigned long currentMillis = rtcMillis();
 
-  sd.temperature = dht.readTemperature();
+  bme.takeForcedMeasurement(); // has no effect in normal mode
-  sd.humidity = dht.readHumidity();
 
-  bmp.getPressure(&(sd.pressure));
+  sd.temp2 = dht.readTemperature();
-  sd.pressure /= 100;
+  sd.humidity2 = dht.readHumidity();
-  bmp.getTemperature(&(sd.temp2));
+
+  //bmp.getPressure(&(sd.pressure));
+  //sd.pressure /= 100;
+  //bmp.getTemperature(&(sd.temp2));
+
+  sd.temperature = bme.readTemperature();
+  sd.humidity = bme.readHumidity();
+  sd.pressure = bme.readPressure() / 100.0F;
 
 #ifndef EXTERNAL_POWER
   sd.voltage = ESP.getVcc()/1024.0;
@@ -260,7 +271,7 @@ void ICACHE_FLASH_ATTR sendValues() {
 
   if (rtcMillis() - geiger_previousMillis > 10000) {
     sd.cpm = geiger_counts * 60000 / (rtcMillis() - geiger_previousMillis);
-    DEBUG_MSG("[DEBUG] resetting geiger counts. was: %d\n", geiger_counts);
+    DEBUG_MSG("[DEBUG] resetting geiger counts. was: %ld\n", geiger_counts);
     geiger_previousMillis = rtcMillis();
     geiger_counts = 0;
     geigeraverage.addValue(sd.cpm);
@@ -269,10 +280,11 @@ void ICACHE_FLASH_ATTR sendValues() {
   float constexpr own_cpm = OWN_BACKGROUND_CPS * 60;
   sd.radioactivity = (sd.cpm - own_cpm) * CONV_FACTOR;
 
-                  DEBUG_MSG("Temperature  : %6.2f°C    (DHT22)\n", sd.temperature);
+                  DEBUG_MSG("Temperature  : %6.2f°C    (BME280)\n", sd.temperature);
-                  DEBUG_MSG("Humidity     : %6.2f%%     (DHT22)\n", sd.humidity);
+                  DEBUG_MSG("Humidity     : %6.2f%%     (BME280)\n", sd.humidity);
-                  DEBUG_MSG("Temperature  : %6.2f°C    (BMP180)\n", sd.temp2);
+                  DEBUG_MSG("Pressure     : %6.2fhPa   (BME280)\n", sd.pressure);
-                  DEBUG_MSG("Pressure     : %6.2fhPa   (BMP180)\n", sd.pressure);
+                  DEBUG_MSG("Temperature  : %6.2f°C    (DHT22)\n", sd.temp2);
+                  DEBUG_MSG("Humidity     : %6.2f%%     (DHT22)\n", sd.humidity2);
   if (sd.sds_updated) DEBUG_MSG("Particles 10 : %6.2fµg/m³ (SDS011)\n", sd.p10);
   if (sd.sds_updated) DEBUG_MSG("Particles 2.5: %6.2fµg/m³ (SDS011)\n", sd.p25);
   if (sd.cpm > 0)    DEBUG_MSG("Radiation    : %6.2fµSv/h (J305)\n", sd.radioactivity);
@@ -359,7 +371,7 @@ void ICACHE_FLASH_ATTR sendValues() {
     char url[100];
     sprintf(url, "http://%s/boxes/%s/data", server, SENSEBOX_ID);
 
-    httpclient.begin(url);
+    httpclient.begin(wificlient, url);
     httpclient.addHeader("Content-Type", "application/json");
 
     httpCode = httpclient.POST(buffer);
@@ -431,20 +443,28 @@ void setup() {
   Serial.begin(115200);
   #endif
 
-  pinMode(LED_BUILTIN, OUTPUT);
+  //pinMode(LED_BUILTIN, OUTPUT);
-  digitalWrite(LED_BUILTIN, HIGH);  // turn OFF board led
+  //digitalWrite(LED_BUILTIN, HIGH);  // turn OFF board led
 
   //wifi_status_led_uninstall();
 
+  Wire.begin(BME_SDA, BME_SCL);
+  for (int tries=0; tries<5 && !bme.begin(0x76, &Wire); tries++) {
+    DEBUG_MSG("[ERROR] No valid BME280 sensor!\n");
+    delay(20);
+  }
+
+  // weather monitoring
+  bme.setSampling(Adafruit_BME280::MODE_FORCED,
+                  Adafruit_BME280::SAMPLING_X1, // temperature
+                  Adafruit_BME280::SAMPLING_X1, // pressure
+                  Adafruit_BME280::SAMPLING_X1, // humidity
+                  Adafruit_BME280::FILTER_OFF   );
+
   sds.begin();
   sds.setCustomWorkingPeriod(5);  // sensor sends data every 5 minutes
   sds.setQueryReportingMode();  // ensures sensor is in 'query' reporting mode
 
-  Wire.begin(BMP_SDA, BMP_SCL);
-  if (!bmp.begin(BMP085_MODE_STANDARD)) {
-    DEBUG_MSG("[ERROR] No valid BMP085 sensor!\n");
-  }
-
   dht.begin();
 
   pinMode(GEIGER_PIN, INPUT);
@@ -466,11 +486,11 @@ void loop() {
   unsigned long currentMillis = rtcMillis();
   if ((currentMillis - previousMillis) >= postingInterval) {
     previousMillis = currentMillis;
-    DEBUG_MSG("[DEBUG] sending values... previousMillis:%u, millis():%u, difference:%d\n", previousMillis, currentMillis, currentMillis-previousMillis);
+    DEBUG_MSG("[DEBUG] sending values... previousMillis:%lu, millis():%lu, difference:%ld\n", previousMillis, currentMillis, currentMillis-previousMillis);
     sendValues();
   }
   DEBUG_MSG("[DEBUG] heap: %d\n", ESP.getFreeHeap());
-  DEBUG_MSG("[DEBUG] sleeping now... (%u)\n", currentMillis);
+  DEBUG_MSG("[DEBUG] sleeping now... (%lu)\n", currentMillis);
 
   delay(10);
   detachInterrupt(digitalPinToInterrupt(GEIGER_PIN));