intermediate: read BME280

lib/iictask/GwIicTask.cpp

@@ -7,6 +7,7 @@
 #include "N2kMessages.h"
 #include "GwHardware.h"
 #include "GwXdrTypeMappings.h"
+#include <Adafruit_BME280.h>
 //#define GWSHT3X -1
 
 #ifndef GWIIC_SDA
@@ -55,6 +56,16 @@ class QMP6988Config{
             offset=config->getInt(GwConfigDefinitions::QMP6988POffset);
         }
 };
+
+class BME280Config{
+    public:
+    bool active=true;
+    int iid=99;
+    long interval=2000;
+    BME280Config(GwConfigHandler *config){
+
+    }
+};
 void runIicTask(GwApi *api);
 void initIicTask(GwApi *api){
     GwLog *logger=api->getLogger();
@@ -113,6 +124,17 @@ void initIicTask(GwApi *api){
             LOG_DEBUG(GwLog::LOG,"QMP6988 configured but disabled");
         }
     #endif
+    #ifdef GWBME280
+        api->addCapability("BME280","true");
+        BME280Config bme280Config(api->getConfig());
+        if (bme280Config.active){
+            LOG_DEBUG(GwLog::DEBUG,"BME280 configured and active, adding capability and xdr mapping");
+            addTask=true;
+        }
+        else{
+            LOG_DEBUG(GwLog::DEBUG,"BME280 configured but disabled");
+        }
+    #endif
     if (addTask){
         api->addUserTask(runIicTask,"iicTask",3000);
     }
@@ -191,6 +213,30 @@ void runIicTask(GwApi *api){
             });
         }
     #endif
+    #ifdef GWBME280
+        int baddr=GWBME280;
+        if (baddr < 0) baddr=0x76;
+        BME280Config bme280Config(api->getConfig());
+        if (bme280Config.active){
+            Adafruit_BME280 *bme280=new Adafruit_BME280();
+            if (bme280->begin(baddr,&Wire)){
+                uint32_t sensorId=bme280->sensorID();
+                bool hasHumidity=sensorId == 0x60; //BME280, else BMP280
+                LOG_DEBUG(GwLog::LOG,"initialized BME280 at %d, sensorId 0x%x",baddr,sensorId);
+                timers.addAction(bme280Config.interval,[logger,api,bme280,bme280Config,counterId,hasHumidity](){
+                    float pressure=bme280->readPressure();
+                    float temperature=bme280->readTemperature();
+                    float humidity=-1;
+                    if (hasHumidity) humidity=bme280->readHumidity();
+                    LOG_DEBUG(GwLog::DEBUG,"BME280 read press=%.0f, temp=%.1f, humid=%02.0f",pressure,temperature,humidity);
+                });
+                runLoop=true;
+            }
+            else{
+                LOG_DEBUG(GwLog::ERROR,"unable to initialize BME280 sensor at address %d",baddr);
+            }
+        }
+    #endif
     if (! runLoop){
         LOG_DEBUG(GwLog::LOG,"nothing to do for IIC task, finish");
         vTaskDelete(NULL);

lib/iictask/platformio.ini

@@ -8,5 +8,13 @@ build_flags=
     -D M5_ENV3
     -D M5_CAN_KIT
     ${env.build_flags}
-upload_port = /dev/esp32
+
-upload_protocol = esptool
+[env:m5stack-atom-bme280]
+board = m5stack-atom
+lib_deps = 
+    ${env.lib_deps}
+build_flags=
+    -D GWBME280=-1
+    -D M5_GROOVEIIC
+    -D M5_CAN_KIT
+    ${env.build_flags}

platformio.ini

@@ -34,6 +34,12 @@ lib_deps =
 	WiFi
 	Update
 	Wire
+	SPI
+	adafruit/Adafruit BME280 Library @ 2.2.2
+	adafruit/Adafruit BusIO @ 1.14.5
+    adafruit/Adafruit Unified Sensor @ 1.1.13
+
+
 board_build.embed_files = 
 	lib/generated/index.html.gz
 	lib/generated/index.js.gz