Sample BLE thermometer profile for nRF51-DK with sensing from LM35
Dependencies: BLE_API mbed nRF51822 X_NUCLEO_IDB0XA1
Fork of BLE_Thermometer by
Diff: main.cpp
- Revision:
- 0:d01bde90471b
- Child:
- 1:2deb859ed1a3
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/main.cpp Tue Sep 02 10:34:01 2014 +0000 @@ -0,0 +1,96 @@ +/* mbed Microcontroller Library + * Copyright (c) 2006-2013 ARM Limited + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +#include "mbed.h" +#include "BLEDevice.h" +#include "HealthThermometerService.h" +#include "DHT.h" + +BLEDevice ble; +DigitalOut led1(LED1); +DHT sensor(D10, DHT11); + +#define NEED_CONSOLE_OUTPUT 0 /* Set this if you need debug messages on the console; + * it will have an impact on code-size and power consumption. */ + +#if NEED_CONSOLE_OUTPUT +Serial pc(USBTX, USBRX); +#define DEBUG(...) { pc.printf(__VA_ARGS__); } +#else +#define DEBUG(...) /* nothing */ +#endif /* #if NEED_CONSOLE_OUTPUT */ + +const static char DEVICE_NAME[] = "Therm"; +static const uint16_t uuid16_list[] = {GattService::UUID_HEALTH_THERMOMETER_SERVICE}; +static volatile bool triggerSensorPolling = false; + +void disconnectionCallback(Gap::Handle_t handle) +{ + DEBUG("Disconnected handle %u!\n\r", handle); + DEBUG("Restarting the advertising process\n\r"); + ble.startAdvertising(); +} + +void periodicCallback(void) +{ + led1 = !led1; /* Do blinky on LED1 while we're waiting for BLE events */ + + /* Note that the periodicCallback() executes in interrupt context, so it is safer to do + * heavy-weight sensor polling from the main thread. */ + triggerSensorPolling = true; +} + +int main(void) +{ + led1 = 1; + Ticker ticker; + ticker.attach(periodicCallback, 1); + + DEBUG("Initialising the nRF51822\n\r"); + ble.init(); + ble.onDisconnection(disconnectionCallback); + + /* setup advertising */ + ble.accumulateAdvertisingPayload(GapAdvertisingData::BREDR_NOT_SUPPORTED | GapAdvertisingData::LE_GENERAL_DISCOVERABLE); + ble.accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LIST_16BIT_SERVICE_IDS, (uint8_t *)uuid16_list, sizeof(uuid16_list)); + ble.accumulateAdvertisingPayload(GapAdvertisingData::THERMOMETER_EAR); + ble.accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LOCAL_NAME, (uint8_t *)DEVICE_NAME, sizeof(DEVICE_NAME)); + ble.setAdvertisingType(GapAdvertisingParams::ADV_CONNECTABLE_UNDIRECTED); + ble.setAdvertisingInterval(1600); /* 1000ms; in multiples of 0.625ms. */ + ble.startAdvertising(); + + float initialTemperature = 39.6; + HealthThermometerService thermometerService(ble, initialTemperature, HealthThermometerService::LOCATION_EAR); + + int error = 0; + float c = 0.0f; + + while (true) { + if (triggerSensorPolling) { + triggerSensorPolling = false; + + /* Do blocking calls or whatever is necessary for sensor polling. */ + /* In our case, we simply update the dummy HRM measurement. */ + error = sensor.readData(); + if (!error) { + c = sensor.ReadTemperature(CELCIUS); + thermometerService.updateTemperature(c); + } + } else { + ble.waitForEvent(); + } + } +}