Application for nRF51822 mbed KIT that controls the intensity of LED2 using the BLE UART Service. Works with the Android App BLE_mbed_Remote available here https://github.com/bennthomsen/BLE_mbed_Remote
Dependencies: BLE_API mbed nRF51822
Fork of BLE_UART_LEDControl_Echo by
This program demonstrates the use of the BLE UART Service to receive and send commands in order to remotely control the operation. In this example the intensity of LED2 can be remotely controlled.
The program accepts commands of the form "led2 0.1" over the BLE UART Service and uses these to set the duty cycle of the PWM Output that is connected to LED2 on the nRF51822 mbed KIT.
An Example Android App is available here https://github.com/bennthomsen/BLE_mbed_Remote. The complete source code and Android Studio Project files are available and can simply be pulled into Android Studio. The App implements sending of text, LED on off Button and a slider to control the LED brightness. At this stage setting the switch to off sets the PWM duty cycle to 0.0, however due to the PWMOut implementation in mbed the LED is not completely off at this point.
main.cpp@2:e060367b9024, 2014-06-13 (annotated)
- Committer:
- Rohit Grover
- Date:
- Fri Jun 13 11:19:22 2014 +0100
- Revision:
- 2:e060367b9024
- Parent:
- 0:e910d9bb040f
- Child:
- 5:4bc41267a03a
update demo to use the new APIs; we have it working now.
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
yihui | 0:e910d9bb040f | 1 | /* mbed Microcontroller Library |
yihui | 0:e910d9bb040f | 2 | * Copyright (c) 2006-2013 ARM Limited |
yihui | 0:e910d9bb040f | 3 | * |
yihui | 0:e910d9bb040f | 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
yihui | 0:e910d9bb040f | 5 | * you may not use this file except in compliance with the License. |
yihui | 0:e910d9bb040f | 6 | * You may obtain a copy of the License at |
yihui | 0:e910d9bb040f | 7 | * |
yihui | 0:e910d9bb040f | 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
yihui | 0:e910d9bb040f | 9 | * |
yihui | 0:e910d9bb040f | 10 | * Unless required by applicable law or agreed to in writing, software |
yihui | 0:e910d9bb040f | 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
yihui | 0:e910d9bb040f | 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
yihui | 0:e910d9bb040f | 13 | * See the License for the specific language governing permissions and |
yihui | 0:e910d9bb040f | 14 | * limitations under the License. |
yihui | 0:e910d9bb040f | 15 | */ |
yihui | 0:e910d9bb040f | 16 | |
yihui | 0:e910d9bb040f | 17 | #include "mbed.h" |
Rohit Grover |
2:e060367b9024 | 18 | #include "BLEDevice.h" |
yihui | 0:e910d9bb040f | 19 | |
Rohit Grover |
2:e060367b9024 | 20 | #define BLE_UUID_NUS_SERVICE 0x0001 /**< The UUID of the Nordic UART Service. */ |
Rohit Grover |
2:e060367b9024 | 21 | #define BLE_UUID_NUS_TX_CHARACTERISTIC 0x0002 /**< The UUID of the TX Characteristic. */ |
Rohit Grover |
2:e060367b9024 | 22 | #define BLE_UUID_NUS_RX_CHARACTERISTIC 0x0003 /**< The UUID of the RX Characteristic. */ |
yihui | 0:e910d9bb040f | 23 | |
Rohit Grover |
2:e060367b9024 | 24 | #define NEED_CONSOLE_OUTPUT 0 /* Set this if you need debug messages on the console; |
Rohit Grover |
2:e060367b9024 | 25 | * it will have an impact on code-size and power consumption. */ |
yihui | 0:e910d9bb040f | 26 | |
Rohit Grover |
2:e060367b9024 | 27 | #if NEED_CONSOLE_OUTPUT |
Rohit Grover |
2:e060367b9024 | 28 | Serial pc(USBTX, USBRX); |
Rohit Grover |
2:e060367b9024 | 29 | #define DEBUG(...) { pc.printf(__VA_ARGS__); } |
yihui | 0:e910d9bb040f | 30 | #else |
Rohit Grover |
2:e060367b9024 | 31 | #define DEBUG(...) /* nothing */ |
Rohit Grover |
2:e060367b9024 | 32 | #endif /* #if NEED_CONSOLE_OUTPUT */ |
yihui | 0:e910d9bb040f | 33 | |
Rohit Grover |
2:e060367b9024 | 34 | BLEDevice ble; |
Rohit Grover |
2:e060367b9024 | 35 | DigitalOut led1(LED1); |
yihui | 0:e910d9bb040f | 36 | |
yihui | 0:e910d9bb040f | 37 | // The Nordic UART Service |
Rohit Grover |
2:e060367b9024 | 38 | static const uint8_t uart_base_uuid[] = {0x6e, 0x40, 0x00, 0x01, 0xb5, 0xa3, 0xf3, 0x93, 0xe0, 0xa9, 0xe5,0x0e, 0x24, 0xdc, 0xca, 0x9e}; |
Rohit Grover |
2:e060367b9024 | 39 | static const uint8_t uart_tx_uuid[] = {0x6e, 0x40, 0x00, 0x02, 0xb5, 0xa3, 0xf3, 0x93, 0xe0, 0xa9, 0xe5,0x0e, 0x24, 0xdc, 0xca, 0x9e}; |
Rohit Grover |
2:e060367b9024 | 40 | static const uint8_t uart_rx_uuid[] = {0x6e, 0x40, 0x00, 0x03, 0xb5, 0xa3, 0xf3, 0x93, 0xe0, 0xa9, 0xe5,0x0e, 0x24, 0xdc, 0xca, 0x9e}; |
Rohit Grover |
2:e060367b9024 | 41 | static const uint8_t uart_base_uuid_rev[] = {0x9e, 0xca, 0xdc, 0x24, 0x0e, 0xe5, 0xa9, 0xe0, 0x93, 0xf3, 0xa3, 0xb5, 0x01, 0x00, 0x40, 0x6e}; |
yihui | 0:e910d9bb040f | 42 | uint8_t txPayload[8] = {0,}; |
yihui | 0:e910d9bb040f | 43 | uint8_t rxPayload[8] = {0,}; |
Rohit Grover |
2:e060367b9024 | 44 | GattCharacteristic txCharacteristic (uart_tx_uuid, txPayload, 1, 8, |
Rohit Grover |
2:e060367b9024 | 45 | GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_WRITE | GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_WRITE_WITHOUT_RESPONSE); |
Rohit Grover |
2:e060367b9024 | 46 | GattCharacteristic rxCharacteristic (uart_rx_uuid, rxPayload, 1, 8, |
Rohit Grover |
2:e060367b9024 | 47 | GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_NOTIFY); |
Rohit Grover |
2:e060367b9024 | 48 | GattCharacteristic *uartChars[] = {&txCharacteristic, &rxCharacteristic}; |
Rohit Grover |
2:e060367b9024 | 49 | GattService uartService(uart_base_uuid, uartChars, sizeof(uartChars) / sizeof(GattCharacteristic *)); |
yihui | 0:e910d9bb040f | 50 | |
Rohit Grover |
2:e060367b9024 | 51 | void disconnectionCallback(void) |
yihui | 0:e910d9bb040f | 52 | { |
Rohit Grover |
2:e060367b9024 | 53 | DEBUG("Disconnected!\n\r"); |
Rohit Grover |
2:e060367b9024 | 54 | DEBUG("Restarting the advertising process\n\r"); |
Rohit Grover |
2:e060367b9024 | 55 | ble.startAdvertising(); |
Rohit Grover |
2:e060367b9024 | 56 | } |
yihui | 0:e910d9bb040f | 57 | |
Rohit Grover |
2:e060367b9024 | 58 | void onDataWritten(uint16_t charHandle) |
yihui | 0:e910d9bb040f | 59 | { |
Rohit Grover |
2:e060367b9024 | 60 | if (charHandle == txCharacteristic.getHandle()) { |
Rohit Grover |
2:e060367b9024 | 61 | DEBUG("onDataWritten()\n\r"); |
Rohit Grover |
2:e060367b9024 | 62 | uint16_t bytesRead; |
Rohit Grover |
2:e060367b9024 | 63 | ble.readCharacteristicValue(txCharacteristic.getHandle(), txPayload, &bytesRead); |
Rohit Grover |
2:e060367b9024 | 64 | DEBUG("ECHO: %s\n\r", (char *)txPayload); |
Rohit Grover |
2:e060367b9024 | 65 | ble.updateCharacteristicValue(rxCharacteristic.getHandle(), txPayload, bytesRead); |
yihui | 0:e910d9bb040f | 66 | } |
Rohit Grover |
2:e060367b9024 | 67 | } |
yihui | 0:e910d9bb040f | 68 | |
Rohit Grover |
2:e060367b9024 | 69 | void periodicCallback(void) |
Rohit Grover |
2:e060367b9024 | 70 | { |
Rohit Grover |
2:e060367b9024 | 71 | led1 = !led1; /* Do blinky on LED1 while we're waiting for BLE events */ |
Rohit Grover |
2:e060367b9024 | 72 | } |
yihui | 0:e910d9bb040f | 73 | |
yihui | 0:e910d9bb040f | 74 | int main(void) |
yihui | 0:e910d9bb040f | 75 | { |
Rohit Grover |
2:e060367b9024 | 76 | led1 = 1; |
Rohit Grover |
2:e060367b9024 | 77 | Ticker ticker; |
Rohit Grover |
2:e060367b9024 | 78 | ticker.attach(periodicCallback, 1); |
yihui | 0:e910d9bb040f | 79 | |
Rohit Grover |
2:e060367b9024 | 80 | DEBUG("Initialising the nRF51822\n\r"); |
Rohit Grover |
2:e060367b9024 | 81 | ble.init(); |
Rohit Grover |
2:e060367b9024 | 82 | ble.onDisconnection(disconnectionCallback); |
Rohit Grover |
2:e060367b9024 | 83 | ble.onDataWritten(onDataWritten); |
yihui | 0:e910d9bb040f | 84 | |
Rohit Grover |
2:e060367b9024 | 85 | /* setup advertising */ |
Rohit Grover |
2:e060367b9024 | 86 | ble.accumulateAdvertisingPayload(GapAdvertisingData::BREDR_NOT_SUPPORTED); |
Rohit Grover |
2:e060367b9024 | 87 | ble.setAdvertisingType(GapAdvertisingParams::ADV_CONNECTABLE_UNDIRECTED); |
Rohit Grover |
2:e060367b9024 | 88 | ble.accumulateAdvertisingPayload(GapAdvertisingData::SHORTENED_LOCAL_NAME, |
Rohit Grover |
2:e060367b9024 | 89 | (const uint8_t *)"BLE UART", sizeof("BLE UART") - 1); |
Rohit Grover |
2:e060367b9024 | 90 | ble.accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LIST_128BIT_SERVICE_IDS, |
Rohit Grover |
2:e060367b9024 | 91 | (const uint8_t *)uart_base_uuid_rev, sizeof(uart_base_uuid)); |
yihui | 0:e910d9bb040f | 92 | |
Rohit Grover |
2:e060367b9024 | 93 | ble.setAdvertisingInterval(160); /* 100ms; in multiples of 0.625ms. */ |
Rohit Grover |
2:e060367b9024 | 94 | ble.startAdvertising(); |
yihui | 0:e910d9bb040f | 95 | |
Rohit Grover |
2:e060367b9024 | 96 | ble.addService(uartService); |
yihui | 0:e910d9bb040f | 97 | |
Rohit Grover |
2:e060367b9024 | 98 | while (true) { |
Rohit Grover |
2:e060367b9024 | 99 | ble.waitForEvent(); |
yihui | 0:e910d9bb040f | 100 | } |
yihui | 0:e910d9bb040f | 101 | } |