This is an example to broadcast measured value of BME280 through BLE GATT service.
please refer detail information at GitHub. https://github.com/soramame21/BLE_Server_BME280
source/main.cpp
- Committer:
- Ren Boting
- Date:
- 2017-08-23
- Revision:
- 3:4b41a1ba65c8
- Parent:
- 1:9d1a3835d884
- Child:
- 4:a937975ebe7e
File content as of revision 3:4b41a1ba65c8:
#include "mbed.h" #include "BME280.h" #include "ble/BLE.h" #include "ble/services/EnvironmentalService.h" #if defined(TARGET_TY51822R3) BME280 sensor(I2C_SDA0, I2C_SCL0); #else BME280 sensor(I2C_SDA, I2C_SCL); #endif const static char DEVICE_NAME[] = "BME280"; const static uint16_t uuid16_list[] = {GattService::UUID_ENVIRONMENTAL_SERVICE}; static EnvironmentalService *service = NULL; static EventQueue eventQueue(/* event count */ 16 * EVENTS_EVENT_SIZE); void disconnectionCallback(const Gap::DisconnectionCallbackParams_t *params) { BLE::Instance(BLE::DEFAULT_INSTANCE).gap().startAdvertising(); // restart advertising } void bleInitComplete(BLE::InitializationCompleteCallbackContext *params) { BLE &ble = params->ble; ble_error_t error = params->error; service = new EnvironmentalService(ble); printf("Inside BLE..starting payload creation..\r\n"); ble.gap().onDisconnection(disconnectionCallback); /* Setup advertising. */ ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::BREDR_NOT_SUPPORTED | GapAdvertisingData::LE_GENERAL_DISCOVERABLE); ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LIST_16BIT_SERVICE_IDS, (uint8_t *)uuid16_list, sizeof(uuid16_list)); ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LOCAL_NAME, (uint8_t *)DEVICE_NAME, sizeof(DEVICE_NAME)); ble.gap().setAdvertisingType(GapAdvertisingParams::ADV_CONNECTABLE_UNDIRECTED); ble.gap().setAdvertisingInterval(1000); error = ble.gap().startAdvertising(); printf("ble.gap().startAdvertising() => %u\r\n", error); } void readSensorCallback(void) { float tmp_t, tmp_p, tmp_h; if(service != NULL) { tmp_t = sensor.getTemperature(); tmp_p = sensor.getPressure(); tmp_h = sensor.getHumidity(); service->updatePressure(tmp_p); service->updateTemperature(tmp_t); service->updateHumidity(tmp_h); printf("%04.2f hPa, %2.2f degC, %2.2f %%\r\n", tmp_p, tmp_t, tmp_h ); } } void scheduleBleEventsProcessing(BLE::OnEventsToProcessCallbackContext* context) { BLE &ble = BLE::Instance(); eventQueue.call(Callback<void()>(&ble, &BLE::processEvents)); } int main() { eventQueue.call_every(1000, readSensorCallback); BLE &ble = BLE::Instance(); ble.onEventsToProcess(scheduleBleEventsProcessing); ble.init(bleInitComplete); eventQueue.dispatch_forever(); return 0; }