main.cpp

00001 #define I2C_SDA p3
00002 #define I2C_SCL p4
00003 
00004 #include "mbed.h"
00005 #include "BLE.h"
00006 #include "battery.h"
00007 #include "WeatherService.h"
00008 #include "BatteryService.h"
00009 #include "BMP180.h"
00010 #include "SHT21_ncleee.h"
00011 
00012 
00013 float temperature1;
00014 float temperature2;
00015 float pressure;
00016 float humidity;
00017 
00018 BLE ble;
00019 
00020 DigitalOut okLED(LED1);
00021 DigitalOut errLED(LED2);
00022 DigitalOut instrumentsPower(p30);
00023 
00024 BMP180 bmp180;
00025 SHT21 sht21(&i2c);
00026 
00027 
00028 const static char DEVICE_NAME[] = "Weather Station";
00029 
00030 static const uint16_t serviceList[] = {
00031     GattService::UUID_ENVIRONMENTAL_SERVICE, 
00032     GattService::UUID_BATTERY_SERVICE
00033 };
00034 
00035 static volatile bool triggerSensorPolling = false;
00036 
00037 void disconnectionCallback(const Gap::DisconnectionCallbackParams_t *params)
00038 {
00039     /* Restart Advertising on disconnection*/
00040     ble.gap().startAdvertising();
00041 }
00042 
00043 void blink(void)
00044 {
00045 //    statusLED = !statusLED;
00046     triggerSensorPolling = true;
00047 }
00048 
00049 void updateFromBMP180() {
00050     uint8_t c = bmp180.readByte(BMP180_ADDRESS, BMP180_WHO_AM_I);   
00051     
00052     printf("BMP-180 is 0x%x\n\r", c);
00053     printf("BMP-180 should be 0x55\n");
00054     
00055     if(c == 0x55) {
00056         printf("BMP-180 online\n");
00057        
00058         printf("Calibrating BMP-180...");
00059         bmp180.BMP180Calibration();
00060         printf("done\n");
00061     }
00062     else 
00063     {
00064         printf("BMP-180 unreachable\n");
00065         return;
00066     }    
00067     
00068     temperature1 = (float)bmp180.BMP180GetTemperature()/10.0f;
00069     pressure = (float)bmp180.BMP180GetPressure();
00070 }
00071 
00072 void updateFromSHT21() {
00073     temperature2 = sht21.readTemp();
00074     humidity = sht21.readHumidity();
00075 }
00076 
00077 int main(void)
00078 {
00079     printf("Start\n");
00080     
00081     okLED = 1;
00082     errLED = 1;
00083 
00084     Ticker ticker;
00085     ticker.attach(blink, 5);
00086 
00087     ble.init();
00088     ble.gap().onDisconnection(disconnectionCallback);
00089 
00090     /* Setup weather service. */
00091     WeatherService weatherService(ble);
00092     BatteryService batteryService(ble, 0);
00093     Battery battery(BATTERY_PIN);
00094 
00095     /* setup advertising */
00096     ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::BREDR_NOT_SUPPORTED | GapAdvertisingData::LE_GENERAL_DISCOVERABLE);
00097     ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LIST_16BIT_SERVICE_IDS, (uint8_t *)serviceList, sizeof(serviceList));
00098     ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::UNKNOWN);
00099     ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LOCAL_NAME, (uint8_t *)DEVICE_NAME, sizeof(DEVICE_NAME));
00100     ble.gap().setAdvertisingType(GapAdvertisingParams::ADV_CONNECTABLE_UNDIRECTED);
00101     ble.gap().setAdvertisingInterval(1000); /* 1000ms */
00102     ble.gap().startAdvertising();
00103 
00104     while (true) {
00105         if (triggerSensorPolling && ble.getGapState().connected) {
00106             okLED = 1;
00107             triggerSensorPolling = false;
00108 
00109             instrumentsPower = 1;
00110             wait(1);
00111             updateFromBMP180();
00112             updateFromSHT21();
00113             instrumentsPower = 0;
00114             
00115             float temperature = (temperature1 + temperature2) / 2;
00116             
00117             printf("Temp1: %.1f ºC \n", temperature1);
00118             printf("Temp2: %.1f ºC \n", temperature2);
00119             printf("Temp Avg.: %.1f ºC \n", temperature);
00120             printf("Pressure: %.3f Pa \n", pressure);
00121             printf("Humidity: %.1f%% \n", humidity);
00122             printf("---\n");
00123 
00124             
00125             weatherService.updateTemperature(temperature);
00126             weatherService.updatePressure(pressure);
00127             weatherService.updateHumidity(humidity);
00128                         
00129             
00130             batteryService.updateBatteryLevel(battery.read());
00131         } else {
00132             ble.waitForEvent();
00133         }
00134     }
00135 }