main.cpp

00001 #include "mbed.h"
00002 #include "BLEDevice.h"
00003 #include <string>
00004 #include "UARTService.h"
00005  
00006 #define NEED_CONSOLE_OUTPUT 1 /* Set this if you need debug messages on the console;
00007                                * it will have an impact on code-size and power consumption. */
00008 Serial pc(USBTX, USBRX);
00009 
00010 #if NEED_CONSOLE_OUTPUT
00011 #define DEBUG(...) { pc.printf(__VA_ARGS__); }
00012 #else
00013 #define DEBUG(...) /* nothing */
00014 #endif /* #if NEED_CONSOLE_OUTPUT */
00015  
00016 BLEDevice  ble;
00017 DigitalOut led1(LED1);
00018 DigitalOut led2(LED2);
00019 
00020 DigitalOut powerSwitch(P0_0);
00021  
00022 AnalogIn tempPin(P0_1);
00023  
00024 UARTService *uartServicePtr;
00025  
00026 void disconnectionCallback(Gap::Handle_t handle, Gap::DisconnectionReason_t reason)
00027 {
00028     DEBUG("Disconnected!\n\r");
00029     DEBUG("Restarting the advertising process\n\r");
00030     ble.startAdvertising();
00031 }
00032  
00033 void onDataWritten(const GattCharacteristicWriteCBParams *params)
00034 {
00035     if ((uartServicePtr != NULL) && (params->charHandle == uartServicePtr->getTXCharacteristicHandle())) {
00036         float temp = tempPin.read(); // temperature voltage
00037         
00038         float tempC = ((temp*3.0)-0.5)*100.0; // conversion to celcius
00039         float tempF = (tempC*9.0/5.0)+32.0;                 // conversion to fahrenheit
00040         DEBUG("temp[V]:%f\ttemp[C]:%f\ttemp[F]:%f\n",temp,tempC,tempF);
00041         //DEBUG(params->data, "%
00042         uint16_t bytesRead = params->len;
00043         DEBUG("received %u bytes\n\r", bytesRead);
00044         DEBUG("first byte received: %u\n\r", params->data[0]);
00045         uint8_t on = '1';
00046         uint8_t off = '0';
00047         if (params->data[0] == on) {
00048             led2 = 1;
00049             powerSwitch = 1;
00050         } else if (params->data[0] == off) {
00051             led2 = 0;
00052             powerSwitch = 0;
00053         }
00054         //ble.updateCharacteristicValue(uartServicePtr->getRXCharacteristicHandle(), params->data, bytesRead);
00055         char buffer[9];
00056         sprintf(buffer,"%4.4f",tempF);
00057         ble.updateCharacteristicValue(uartServicePtr->getRXCharacteristicHandle(), (uint8_t *)buffer, sizeof(&buffer));
00058 
00059     }
00060 }
00061  
00062 void periodicCallback(void)
00063 {
00064     led1 = !led1;
00065 }
00066  
00067 int main(void)
00068 {
00069     led1 = 1;
00070     led2 = 0;
00071     powerSwitch = 0;
00072     Ticker ticker;
00073     ticker.attach(periodicCallback, 1);
00074  
00075     DEBUG("Initialising the nRF51822\n\r");
00076     ble.init();
00077     ble.onDisconnection(disconnectionCallback);
00078     ble.onDataWritten(onDataWritten); // called when someone writes to me
00079  
00080     /* setup advertising */
00081     ble.accumulateAdvertisingPayload(GapAdvertisingData::BREDR_NOT_SUPPORTED);
00082     ble.setAdvertisingType(GapAdvertisingParams::ADV_CONNECTABLE_UNDIRECTED);
00083     ble.accumulateAdvertisingPayload(GapAdvertisingData::SHORTENED_LOCAL_NAME,
00084                                      (const uint8_t *)"pgao", sizeof("pgao") - 1);
00085     ble.accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LIST_128BIT_SERVICE_IDS,
00086                                      (const uint8_t *)UARTServiceUUID_reversed, sizeof(UARTServiceUUID_reversed));
00087  
00088     ble.setAdvertisingInterval(160); /* 100ms; in multiples of 0.625ms. */
00089     ble.startAdvertising();
00090  
00091     UARTService uartService(ble);
00092     uartServicePtr = &uartService;
00093  
00094     while (true) {
00095         ble.waitForEvent();
00096     }
00097 }
00098