スマホのアプリで温度を表示するプログラム
Dependencies: BLE_API mbed nRF51822
スマホのアプリで温度を表示するプログラムです。
Android や iOS で、nRF Toolbox というアプリをインストールします。
- アプリを立ち上げて、HTMのアイコンをえらびます
- CONNECT ボタンをおして、リストから自分のデバイスを選びます
- 少し待つと、温度が表示されます
main.cpp@1:1bb2969a0f65, 2016-08-18 (annotated)
- Committer:
- MACRUM
- Date:
- Thu Aug 18 02:26:20 2016 +0000
- Revision:
- 1:1bb2969a0f65
- Parent:
- 0:8a3c9e181611
update libraries
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
MACRUM | 0:8a3c9e181611 | 1 | #include "mbed.h" |
MACRUM | 0:8a3c9e181611 | 2 | #include "BLE.h" |
MACRUM | 0:8a3c9e181611 | 3 | #include "config.h" |
MACRUM | 0:8a3c9e181611 | 4 | |
MACRUM | 0:8a3c9e181611 | 5 | #define MY_NAME "@toyowata" |
MACRUM | 0:8a3c9e181611 | 6 | |
MACRUM | 0:8a3c9e181611 | 7 | const static char DEVICE_NAME[] = MY_NAME; |
MACRUM | 0:8a3c9e181611 | 8 | static volatile bool triggerSensorPolling = false; |
MACRUM | 0:8a3c9e181611 | 9 | |
MACRUM | 0:8a3c9e181611 | 10 | BLEDevice ble; |
MACRUM | 0:8a3c9e181611 | 11 | AnalogIn ain(P0_2); |
MACRUM | 0:8a3c9e181611 | 12 | |
MACRUM | 0:8a3c9e181611 | 13 | /* LEDs for indication: */ |
MACRUM | 0:8a3c9e181611 | 14 | DigitalOut oneSecondLed(LED2, LED_OFF); /* LED2 is toggled every second. */ |
MACRUM | 0:8a3c9e181611 | 15 | DigitalOut advertisingStateLed(LED1, LED_OFF); /* LED1 is on when we are advertising, otherwise off. */ |
MACRUM | 0:8a3c9e181611 | 16 | |
MACRUM | 0:8a3c9e181611 | 17 | /* Health Thermometer Service */ |
MACRUM | 0:8a3c9e181611 | 18 | uint8_t thermTempPayload[5] = { 0, 0, 0, 0, 0 }; |
MACRUM | 0:8a3c9e181611 | 19 | |
MACRUM | 0:8a3c9e181611 | 20 | GattCharacteristic tempChar (GattCharacteristic::UUID_TEMPERATURE_MEASUREMENT_CHAR, |
MACRUM | 0:8a3c9e181611 | 21 | thermTempPayload, 5, 5, |
MACRUM | 0:8a3c9e181611 | 22 | GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_INDICATE); |
MACRUM | 0:8a3c9e181611 | 23 | /* Battery Level Service */ |
MACRUM | 0:8a3c9e181611 | 24 | uint8_t batt = 100; /* Battery level */ |
MACRUM | 0:8a3c9e181611 | 25 | uint8_t read_batt = 0; /* Variable to hold battery level reads */ |
MACRUM | 0:8a3c9e181611 | 26 | GattCharacteristic battLevel ( GattCharacteristic::UUID_BATTERY_LEVEL_CHAR, |
MACRUM | 0:8a3c9e181611 | 27 | (uint8_t *)batt, 1, 1, |
MACRUM | 0:8a3c9e181611 | 28 | GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_NOTIFY); |
MACRUM | 0:8a3c9e181611 | 29 | GattCharacteristic *htmChars[] = {&tempChar, }; |
MACRUM | 0:8a3c9e181611 | 30 | GattCharacteristic *battChars[] = {&battLevel, }; |
MACRUM | 0:8a3c9e181611 | 31 | GattService htmService(GattService::UUID_HEALTH_THERMOMETER_SERVICE, htmChars, |
MACRUM | 0:8a3c9e181611 | 32 | sizeof(htmChars) / sizeof(GattCharacteristic *)); |
MACRUM | 0:8a3c9e181611 | 33 | GattService battService(GattService::UUID_BATTERY_SERVICE, battChars, |
MACRUM | 0:8a3c9e181611 | 34 | sizeof(battChars) / sizeof(GattCharacteristic *)); |
MACRUM | 0:8a3c9e181611 | 35 | |
MACRUM | 0:8a3c9e181611 | 36 | uint16_t uuid16_list[] = {GattService::UUID_HEALTH_THERMOMETER_SERVICE, |
MACRUM | 0:8a3c9e181611 | 37 | GattService::UUID_BATTERY_SERVICE}; |
MACRUM | 0:8a3c9e181611 | 38 | |
MACRUM | 0:8a3c9e181611 | 39 | uint32_t quick_ieee11073_from_float(float temperature); |
MACRUM | 0:8a3c9e181611 | 40 | void updateServiceValues(void); |
MACRUM | 0:8a3c9e181611 | 41 | |
MACRUM | 0:8a3c9e181611 | 42 | static Gap::ConnectionParams_t connectionParams; |
MACRUM | 0:8a3c9e181611 | 43 | |
MACRUM | 0:8a3c9e181611 | 44 | void disconnectionCallback(const Gap::DisconnectionCallbackParams_t *params) // Mod |
MACRUM | 0:8a3c9e181611 | 45 | { |
MACRUM | 0:8a3c9e181611 | 46 | advertisingStateLed = LED_OFF; |
MACRUM | 0:8a3c9e181611 | 47 | |
MACRUM | 0:8a3c9e181611 | 48 | DEBUG("Disconnected handle %u, reason %u\r\n", params->handle, params->reason); |
MACRUM | 0:8a3c9e181611 | 49 | DEBUG("Restarting the advertising process\r\n"); |
MACRUM | 0:8a3c9e181611 | 50 | ble.gap().startAdvertising(); |
MACRUM | 0:8a3c9e181611 | 51 | } |
MACRUM | 0:8a3c9e181611 | 52 | |
MACRUM | 0:8a3c9e181611 | 53 | void onConnectionCallback(const Gap::ConnectionCallbackParams_t *params) //Mod |
MACRUM | 0:8a3c9e181611 | 54 | { |
MACRUM | 0:8a3c9e181611 | 55 | advertisingStateLed = LED_ON; |
MACRUM | 0:8a3c9e181611 | 56 | |
MACRUM | 0:8a3c9e181611 | 57 | DEBUG("connected. Got handle %u\r\n", params->handle); |
MACRUM | 0:8a3c9e181611 | 58 | |
MACRUM | 0:8a3c9e181611 | 59 | connectionParams.slaveLatency = 1; |
MACRUM | 0:8a3c9e181611 | 60 | if (ble.gap().updateConnectionParams(params->handle, &connectionParams) != BLE_ERROR_NONE) { |
MACRUM | 0:8a3c9e181611 | 61 | DEBUG("failed to update connection paramter\r\n"); |
MACRUM | 0:8a3c9e181611 | 62 | } |
MACRUM | 0:8a3c9e181611 | 63 | } |
MACRUM | 0:8a3c9e181611 | 64 | |
MACRUM | 0:8a3c9e181611 | 65 | void periodicCallback(void) |
MACRUM | 0:8a3c9e181611 | 66 | { |
MACRUM | 0:8a3c9e181611 | 67 | oneSecondLed = !oneSecondLed; /* Do blinky on LED1 while we're waiting for BLE events */ |
MACRUM | 0:8a3c9e181611 | 68 | |
MACRUM | 0:8a3c9e181611 | 69 | /* Note that the periodicCallback() executes in interrupt context, so it is safer to do |
MACRUM | 0:8a3c9e181611 | 70 | * heavy-weight sensor polling from the main thread. */ |
MACRUM | 0:8a3c9e181611 | 71 | triggerSensorPolling = true; |
MACRUM | 0:8a3c9e181611 | 72 | } |
MACRUM | 0:8a3c9e181611 | 73 | |
MACRUM | 0:8a3c9e181611 | 74 | /**************************************************************************/ |
MACRUM | 0:8a3c9e181611 | 75 | /*! |
MACRUM | 0:8a3c9e181611 | 76 | @brief Program entry point |
MACRUM | 0:8a3c9e181611 | 77 | */ |
MACRUM | 0:8a3c9e181611 | 78 | /**************************************************************************/ |
MACRUM | 0:8a3c9e181611 | 79 | int main(void) |
MACRUM | 0:8a3c9e181611 | 80 | { |
MACRUM | 0:8a3c9e181611 | 81 | |
MACRUM | 0:8a3c9e181611 | 82 | /* Setup blinky led */ |
MACRUM | 0:8a3c9e181611 | 83 | oneSecondLed = 1; |
MACRUM | 0:8a3c9e181611 | 84 | Ticker ticker; |
MACRUM | 0:8a3c9e181611 | 85 | ticker.attach(periodicCallback, 0.5); |
MACRUM | 0:8a3c9e181611 | 86 | |
MACRUM | 0:8a3c9e181611 | 87 | DEBUG("Initialising the nRF51822\r\n"); |
MACRUM | 0:8a3c9e181611 | 88 | ble.init(); |
MACRUM | 0:8a3c9e181611 | 89 | DEBUG("Init done\r\n"); |
MACRUM | 0:8a3c9e181611 | 90 | ble.gap().onDisconnection(disconnectionCallback); |
MACRUM | 0:8a3c9e181611 | 91 | ble.gap().onConnection(onConnectionCallback); |
MACRUM | 0:8a3c9e181611 | 92 | |
MACRUM | 0:8a3c9e181611 | 93 | ble.gap().getPreferredConnectionParams(&connectionParams); |
MACRUM | 0:8a3c9e181611 | 94 | |
MACRUM | 0:8a3c9e181611 | 95 | /* setup advertising */ |
MACRUM | 0:8a3c9e181611 | 96 | ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::BREDR_NOT_SUPPORTED | GapAdvertisingData::LE_GENERAL_DISCOVERABLE); |
MACRUM | 0:8a3c9e181611 | 97 | ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LIST_16BIT_SERVICE_IDS, (uint8_t*)uuid16_list, sizeof(uuid16_list)); |
MACRUM | 0:8a3c9e181611 | 98 | ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::GENERIC_THERMOMETER); |
MACRUM | 0:8a3c9e181611 | 99 | ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LOCAL_NAME, (uint8_t *)DEVICE_NAME, sizeof(DEVICE_NAME)); |
MACRUM | 0:8a3c9e181611 | 100 | ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::SHORTENED_LOCAL_NAME, (uint8_t *)DEVICE_NAME, sizeof(DEVICE_NAME)); |
MACRUM | 0:8a3c9e181611 | 101 | ble.gap().setAdvertisingType(GapAdvertisingParams::ADV_CONNECTABLE_UNDIRECTED); |
MACRUM | 0:8a3c9e181611 | 102 | ble.gap().setAdvertisingInterval(160); /* 100ms; in multiples of 0.625ms. */ |
MACRUM | 0:8a3c9e181611 | 103 | ble.gap().startAdvertising(); |
MACRUM | 0:8a3c9e181611 | 104 | advertisingStateLed = LED_OFF; |
MACRUM | 0:8a3c9e181611 | 105 | DEBUG("Start Advertising\r\n"); |
MACRUM | 0:8a3c9e181611 | 106 | |
MACRUM | 0:8a3c9e181611 | 107 | ble.gattServer().addService(htmService); |
MACRUM | 0:8a3c9e181611 | 108 | ble.gattServer().addService(battService); |
MACRUM | 0:8a3c9e181611 | 109 | DEBUG("Add Service\r\n"); |
MACRUM | 0:8a3c9e181611 | 110 | |
MACRUM | 0:8a3c9e181611 | 111 | while (true) { |
MACRUM | 0:8a3c9e181611 | 112 | if (triggerSensorPolling) { |
MACRUM | 0:8a3c9e181611 | 113 | triggerSensorPolling = false; |
MACRUM | 0:8a3c9e181611 | 114 | updateServiceValues(); |
MACRUM | 0:8a3c9e181611 | 115 | } else { |
MACRUM | 0:8a3c9e181611 | 116 | ble.waitForEvent(); |
MACRUM | 0:8a3c9e181611 | 117 | } |
MACRUM | 0:8a3c9e181611 | 118 | } |
MACRUM | 0:8a3c9e181611 | 119 | } |
MACRUM | 0:8a3c9e181611 | 120 | |
MACRUM | 0:8a3c9e181611 | 121 | /**************************************************************************/ |
MACRUM | 0:8a3c9e181611 | 122 | /*! |
MACRUM | 0:8a3c9e181611 | 123 | @brief Ticker callback to switch advertisingStateLed state |
MACRUM | 0:8a3c9e181611 | 124 | */ |
MACRUM | 0:8a3c9e181611 | 125 | /**************************************************************************/ |
MACRUM | 0:8a3c9e181611 | 126 | void updateServiceValues(void) |
MACRUM | 0:8a3c9e181611 | 127 | { |
MACRUM | 0:8a3c9e181611 | 128 | /* Decrement the battery level. */ |
MACRUM | 0:8a3c9e181611 | 129 | batt <=50 ? batt=100 : batt--; |
MACRUM | 0:8a3c9e181611 | 130 | |
MACRUM | 0:8a3c9e181611 | 131 | float temperature = (ain.read() * 3.2 - 0.6) / 0.01; |
MACRUM | 0:8a3c9e181611 | 132 | |
MACRUM | 0:8a3c9e181611 | 133 | DEBUG("temp:%f\r\n", temperature); |
MACRUM | 0:8a3c9e181611 | 134 | uint32_t temp_ieee11073 = quick_ieee11073_from_float(temperature); |
MACRUM | 0:8a3c9e181611 | 135 | memcpy(thermTempPayload+1, &temp_ieee11073, 4); |
MACRUM | 0:8a3c9e181611 | 136 | ble.gattServer().write(tempChar.getValueAttribute().getHandle(), thermTempPayload, sizeof(thermTempPayload)); //Mod |
MACRUM | 0:8a3c9e181611 | 137 | ble.gattServer().write(battLevel.getValueAttribute().getHandle(), (uint8_t *)&batt, sizeof(batt)); //Mod |
MACRUM | 0:8a3c9e181611 | 138 | } |
MACRUM | 0:8a3c9e181611 | 139 | |
MACRUM | 0:8a3c9e181611 | 140 | /** |
MACRUM | 0:8a3c9e181611 | 141 | * @brief A very quick conversion between a float temperature and 11073-20601 FLOAT-Type. |
MACRUM | 0:8a3c9e181611 | 142 | * @param temperature The temperature as a float. |
MACRUM | 0:8a3c9e181611 | 143 | * @return The temperature in 11073-20601 FLOAT-Type format. |
MACRUM | 0:8a3c9e181611 | 144 | */ |
MACRUM | 0:8a3c9e181611 | 145 | uint32_t quick_ieee11073_from_float(float temperature) |
MACRUM | 0:8a3c9e181611 | 146 | { |
MACRUM | 0:8a3c9e181611 | 147 | uint8_t exponent = 0xFF; //exponent is -1 |
MACRUM | 0:8a3c9e181611 | 148 | uint32_t mantissa = (uint32_t)(temperature*10); |
MACRUM | 0:8a3c9e181611 | 149 | |
MACRUM | 0:8a3c9e181611 | 150 | return ( ((uint32_t)exponent) << 24) | mantissa; |
MACRUM | 0:8a3c9e181611 | 151 | } |