main.cpp

00001 #define I2C_SDA p3
00002 #define I2C_SCL p4
00003 #define BAT_SENSE p1
00004 
00005 #include "mbed.h"
00006 #include "BLE.h"
00007 #include "LampService.h"
00008 #include "BatteryService.h"
00009 
00010 BLE ble;
00011 
00012 PwmOut light(LED1);
00013 AnalogIn battery(BAT_SENSE);
00014 
00015 
00016 const static char DEVICE_NAME[] = "Lemp";
00017 
00018 static const uint16_t serviceList[] = {
00019     GattService::UUID_ENVIRONMENTAL_SERVICE, 
00020     GattService::UUID_BATTERY_SERVICE
00021 };
00022 
00023 void disconnectionCallback(const Gap::DisconnectionCallbackParams_t *params)
00024 {
00025     /* Restart Advertising on disconnection*/
00026     ble.gap().startAdvertising();
00027 }
00028 
00029 
00030 int main(void)
00031 {
00032     printf("Start\n");
00033     
00034     light = 1;
00035     
00036     ble.init();
00037     ble.gap().onDisconnection(disconnectionCallback);
00038 
00039     /* Setup weather service. */
00040     LampService lampService(ble);
00041     BatteryService batteryService(ble, 0);
00042 +
00043     /* setup advertising */
00044     ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::BREDR_NOT_SUPPORTED | GapAdvertisingData::LE_GENERAL_DISCOVERABLE);
00045     //TODo add lamp service to the list
00046     ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LIST_16BIT_SERVICE_IDS, (uint8_t *)serviceList, sizeof(serviceList));
00047     ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LOCAL_NAME, (uint8_t *)DEVICE_NAME, sizeof(DEVICE_NAME));
00048     ble.gap().setAdvertisingType(GapAdvertisingParams::ADV_CONNECTABLE_UNDIRECTED);
00049     ble.gap().setAdvertisingInterval(500); /* 1000ms */
00050     ble.gap().startAdvertising();
00051 
00052 //    light.period(0.0005f);
00053 //    light.write(0.98f);   
00054          
00055     while (true) {
00056         if (ble.getGapState().connected) {
00057             uint8_t buffer[1];
00058             uint16_t lenght=sizeof(uint8_t);
00059 
00060             ble.gattServer().read(lampService.lightLevelCharacteristic.getValueHandle(), buffer, &lenght);
00061             
00062             int lightLevel = (int)buffer[0];
00063             
00064             if (lightLevel > 0) {
00065                 light = 0;
00066             }
00067             else {
00068                 light = 1;
00069             }
00070             
00071             // Voltage divider ratio on TinyBLE's battery sense is 18% for some reason (R1 = 10M, R2 = 2.2M)
00072             // So, on 3.3V the ADC will indicate only 18% capacity. We remap so that 18% is 100%
00073             // PS: battery = 0->1
00074             float batteryLvl = ((battery.read() * 100.0f) * 100.0f) / 18.0f;
00075             
00076             if (batteryLvl > 100) {
00077                 batteryLvl = 100.0f;
00078             }
00079                                     
00080             batteryService.updateBatteryLevel(batteryLvl);
00081         } 
00082         else {
00083             ble.waitForEvent();
00084         }
00085     }
00086 }