BLE sensor for temperature and humidity using Si7021 and photocell.
Dependencies: BLE_API mbed nRF51822
main.cpp
- Committer:
- sunsmile2015
- Date:
- 2015-07-31
- Revision:
- 4:e5fa4c8838db
- Parent:
- 3:3eda308b78e6
- Child:
- 5:f4d74a8cad43
File content as of revision 4:e5fa4c8838db:
/* mbed Microcontroller Library * Copyright (c) 2006-2015 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 "ble/BLE.h" #include "TMP_nrf51/TMP_nrf51.h" #define APP_SPECIFIC_ID_TEST 0xFEFE #pragma pack(1) struct ApplicationData_t { uint16_t applicationSpecificId; /* An ID used to identify temperature value in the manufacture specific AD data field */ TMP_nrf51::tmpSensorValue_t tmpSensorValue; /* User defined application data */ }; #pragma pack() BLE ble; TMP_nrf51 tempSensor; DigitalOut alivenessLED(LED1, 1); static bool triggerTempValueUpdate = false; void periodicCallback(void) { /* Do blinky on LED1 while we're waiting for BLE events */ alivenessLED = !alivenessLED; triggerTempValueUpdate = true; } void accumulateApplicationData(ApplicationData_t &appData) { appData.applicationSpecificId = APP_SPECIFIC_ID_TEST; /* Read a new temperature value */ appData.tmpSensorValue = tempSensor.get(); } void temperatureValueAdvertising(void) { ApplicationData_t appData; accumulateApplicationData(appData); //printf("Temp is %f\r\n", (float)appData.tmpSensorValue); /* Setup advertising payload */ ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::BREDR_NOT_SUPPORTED | GapAdvertisingData::LE_GENERAL_DISCOVERABLE); /* Set flag */ ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::GENERIC_THERMOMETER); /* Set appearance */ ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::MANUFACTURER_SPECIFIC_DATA, (uint8_t *)&appData, sizeof(ApplicationData_t)); /* Set data */ /* Setup advertising parameters */ ble.gap().setAdvertisingType(GapAdvertisingParams::ADV_NON_CONNECTABLE_UNDIRECTED); ble.gap().setAdvertisingInterval(500); /* Start advertising */ ble.gap().startAdvertising(); } void updateSensorValueInAdvPayload(void) { ApplicationData_t appData; accumulateApplicationData(appData); /* Stop advertising first */ ble.gap().stopAdvertising(); /* Only update temperature value field */ ble.gap().updateAdvertisingPayload(GapAdvertisingData::MANUFACTURER_SPECIFIC_DATA, (uint8_t *)&appData, sizeof(ApplicationData_t)); /* Start advertising again */ ble.gap().startAdvertising(); } int main(void) { Ticker ticker; /* Enable trigger every 2 seconds */ ticker.attach(periodicCallback, 2); ble.init(); /* Start temperature advertising */ temperatureValueAdvertising(); while (true) { if (triggerTempValueUpdate) { /* Update temperature value */ updateSensorValueInAdvPayload(); triggerTempValueUpdate = false; } ble.waitForEvent(); } }