boting ren / Mbed OS BLE_Server_BME280

This is an example to broadcast measured value of BME280 through BLE GATT service.

Dependencies:   BME280

please refer detail information at GitHub. https://github.com/soramame21/BLE_Server_BME280

source/main.cpp@3:4b41a1ba65c8, 2017-08-23 (annotated)

Committer:
Ren Boting
Date:
Wed Aug 23 13:40:01 2017 +0900
Revision:
3:4b41a1ba65c8
Parent:
1:9d1a3835d884
Child:
4:a937975ebe7e
Refined the application.

1. Update version of mbed-os

2. Clean source code and comments in main.cpp

3. Replace thread solution by using EventQueue

Who changed what in which revision?

UserRevisionLine numberNew contents of line
edamame22 0:f22fa5cc4d56 1 #include "mbed.h"
edamame22 0:f22fa5cc4d56 2 #include "BME280.h"
edamame22 0:f22fa5cc4d56 3 #include "ble/BLE.h"
Ren Boting 3:4b41a1ba65c8 4 #include "ble/services/EnvironmentalService.h"
edamame22 0:f22fa5cc4d56 5
Ren Boting 3:4b41a1ba65c8 6 #if defined(TARGET_TY51822R3)
edamame22 0:f22fa5cc4d56 7 BME280 sensor(I2C_SDA0, I2C_SCL0);
edamame22 0:f22fa5cc4d56 8 #else
edamame22 0:f22fa5cc4d56 9 BME280 sensor(I2C_SDA, I2C_SCL);
edamame22 0:f22fa5cc4d56 10 #endif
edamame22 0:f22fa5cc4d56 11
edamame22 0:f22fa5cc4d56 12 const static char DEVICE_NAME[] = "BME280";
edamame22 0:f22fa5cc4d56 13 const static uint16_t uuid16_list[] = {GattService::UUID_ENVIRONMENTAL_SERVICE};
Ren Boting 3:4b41a1ba65c8 14 static EnvironmentalService *service = NULL;
Ren Boting 3:4b41a1ba65c8 15 static EventQueue eventQueue(/* event count */ 16 * EVENTS_EVENT_SIZE);
edamame22 0:f22fa5cc4d56 16
edamame22 0:f22fa5cc4d56 17 void disconnectionCallback(const Gap::DisconnectionCallbackParams_t *params)
edamame22 0:f22fa5cc4d56 18 {
edamame22 0:f22fa5cc4d56 19 BLE::Instance(BLE::DEFAULT_INSTANCE).gap().startAdvertising(); // restart advertising
edamame22 0:f22fa5cc4d56 20 }
edamame22 0:f22fa5cc4d56 21
edamame22 0:f22fa5cc4d56 22 void bleInitComplete(BLE::InitializationCompleteCallbackContext *params)
edamame22 0:f22fa5cc4d56 23 {
Ren Boting 3:4b41a1ba65c8 24 BLE &ble = params->ble;
edamame22 0:f22fa5cc4d56 25 ble_error_t error = params->error;
Ren Boting 3:4b41a1ba65c8 26 service = new EnvironmentalService(ble);
edamame22 0:f22fa5cc4d56 27
edamame22 0:f22fa5cc4d56 28 printf("Inside BLE..starting payload creation..\r\n");
edamame22 0:f22fa5cc4d56 29 ble.gap().onDisconnection(disconnectionCallback);
edamame22 0:f22fa5cc4d56 30
edamame22 0:f22fa5cc4d56 31 /* Setup advertising. */
edamame22 0:f22fa5cc4d56 32 ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::BREDR_NOT_SUPPORTED | GapAdvertisingData::LE_GENERAL_DISCOVERABLE);
edamame22 0:f22fa5cc4d56 33 ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LIST_16BIT_SERVICE_IDS, (uint8_t *)uuid16_list, sizeof(uuid16_list));
edamame22 0:f22fa5cc4d56 34 ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LOCAL_NAME, (uint8_t *)DEVICE_NAME, sizeof(DEVICE_NAME));
edamame22 0:f22fa5cc4d56 35 ble.gap().setAdvertisingType(GapAdvertisingParams::ADV_CONNECTABLE_UNDIRECTED);
Ren Boting 3:4b41a1ba65c8 36 ble.gap().setAdvertisingInterval(1000);
edamame22 0:f22fa5cc4d56 37 error = ble.gap().startAdvertising();
edamame22 0:f22fa5cc4d56 38
Ren Boting 3:4b41a1ba65c8 39 printf("ble.gap().startAdvertising() => %u\r\n", error);
edamame22 0:f22fa5cc4d56 40
edamame22 0:f22fa5cc4d56 41 }
edamame22 0:f22fa5cc4d56 42
Ren Boting 3:4b41a1ba65c8 43 void readSensorCallback(void)
Ren Boting 3:4b41a1ba65c8 44 {
edamame22 0:f22fa5cc4d56 45 float tmp_t, tmp_p, tmp_h;
Ren Boting 3:4b41a1ba65c8 46
Ren Boting 3:4b41a1ba65c8 47 if(service != NULL) {
Ren Boting 3:4b41a1ba65c8 48 tmp_t = sensor.getTemperature();
Ren Boting 3:4b41a1ba65c8 49 tmp_p = sensor.getPressure();
Ren Boting 3:4b41a1ba65c8 50 tmp_h = sensor.getHumidity();
Ren Boting 3:4b41a1ba65c8 51 service->updatePressure(tmp_p);
Ren Boting 3:4b41a1ba65c8 52 service->updateTemperature(tmp_t);
Ren Boting 3:4b41a1ba65c8 53 service->updateHumidity(tmp_h);
Ren Boting 3:4b41a1ba65c8 54 printf("%04.2f hPa, %2.2f degC, %2.2f %%\r\n", tmp_p, tmp_t, tmp_h );
edamame22 0:f22fa5cc4d56 55 }
edamame22 0:f22fa5cc4d56 56 }
edamame22 0:f22fa5cc4d56 57
Ren Boting 3:4b41a1ba65c8 58 void scheduleBleEventsProcessing(BLE::OnEventsToProcessCallbackContext* context)
Ren Boting 3:4b41a1ba65c8 59 {
Ren Boting 3:4b41a1ba65c8 60 BLE &ble = BLE::Instance();
Ren Boting 3:4b41a1ba65c8 61 eventQueue.call(Callback<void()>(&ble, &BLE::processEvents));
edamame22 0:f22fa5cc4d56 62 }
edamame22 0:f22fa5cc4d56 63
Ren Boting 3:4b41a1ba65c8 64 int main()
Ren Boting 3:4b41a1ba65c8 65 {
Ren Boting 3:4b41a1ba65c8 66 eventQueue.call_every(1000, readSensorCallback);
edamame22 0:f22fa5cc4d56 67
Ren Boting 3:4b41a1ba65c8 68 BLE &ble = BLE::Instance();
Ren Boting 3:4b41a1ba65c8 69 ble.onEventsToProcess(scheduleBleEventsProcessing);
Ren Boting 3:4b41a1ba65c8 70 ble.init(bleInitComplete);
edamame22 0:f22fa5cc4d56 71
Ren Boting 3:4b41a1ba65c8 72 eventQueue.dispatch_forever();
Ren Boting 3:4b41a1ba65c8 73
Ren Boting 3:4b41a1ba65c8 74 return 0;
edamame22 0:f22fa5cc4d56 75 }