BLE sensor for temperature and humidity using Si7021 and photocell.
Dependencies: BLE_API mbed nRF51822
main.cpp
- Committer:
- electronichamsters
- Date:
- 2017-07-10
- Revision:
- 9:b6302fc4e754
- Parent:
- 8:46c5e0bfab05
- Child:
- 10:79e8f92ef156
File content as of revision 9:b6302fc4e754:
/* Eric Tsai todo: hash mac to create unqiue identifier for "my" sensors. BLE sensor */ //required to call the ecb functions extern "C" { #include "nrf_ecb.h" } #include "mbed.h" #include "toolchain.h" #include "ble/BLE.h" #include "TMP_nrf51/TMP_nrf51.h" //comment out when done with debug uart, else eats batteries #define MyDebugEnb 1 //Pin "P0.4" on nRF51822 = mbed "p4". //InterruptIn is pulled-up. GND the pin to activate. // waveshare board ****** //InterruptIn button1(p10); //InterruptIn button2(p11); // purple board ****** InterruptIn button1(p23); InterruptIn button2(p24); //Serial device(p9, p11); // tx, rx, purple board and Rigado #if MyDebugEnb // if you see ~1mA consumption during sleep, that's because uart is enabled. Serial device(p9, p11); //nRF51822 uart : TX=p9. RX=p11 #endif //InterruptIn button(p4); //Pin P0.4 on = mbed "p3"; static Ticker tic_adv; //stop adv static Ticker tic_debounce; //debounce I/O static Ticker tic_periodic; //regular updates //static TMP_nrf51 tempSensor; static bool flag_update_io = false; static bool flag_periodic_call = false; static bool flag_detach_adv_tic = false; static bool flag_set_debounce_tic = false; //not used //static DigitalOut alivenessLED(LED1, 1); float mySensor = 2.0f; /* Optional: Device Name, add for human read-ability */ const static char DEVICE_NAME[] = "CUU"; /* You have up to 26 bytes of advertising data to use. */ /* Advertisement DECvolt:3.11111111,mag:1 AdvData[0-2] = Look for DEC on observer AdvData[3] = beginning of data */ //full with nullls static uint8_t AdvData[] = {0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0}; /* Example of hex data */ char buffer[10]={0, 0, 0, 0, 0, 0, 0, 0, 0, 0}; //battery analog reading uint8_t magnet_near=0; static uint8_t key[16] = {0x1,0x2,0x3,0x4,0x1,0x2,0x3,0x4,0x1,0x2,0x3,0x4,0x1,0x2,0x3,0x4}; //26 bytes adv data static uint8_t encrypted[26] = {0x0,0x0,0x0,0x1,0x1,0x1,0x2,0x2,0x2,0x3,0x3,0x3,0x4,0x4,0x4,0x5,0x5,0x5,0x6,0x6,0x6,0x7,0x7,0x7,0x8,0x8}; /* Example of hex data */ //static uint8_t key_buf[16] = {0x1,0x2,0x3,0x4,0x1,0x2,0x3,0x4,0x1,0x2,0x3,0x4,0x1,0x2,0x3,0x4}; static uint8_t key_buf[16] = {0x1, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7, 0x1, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7, 0x1, 0x2}; static uint8_t src_buf[16] = {0x1,0x2,0x3,0x4,0x1,0x2,0x3,0x4,0x1,0x2,0x3,0x4,0x1,0x2,0x3,0x4}; static uint8_t des_buf[16] = {0x1,0x2,0x3,0x4,0x1,0x2,0x3,0x4,0x1,0x2,0x3,0x4,0x1,0x2,0x3,0x4}; //const static uint8_t AdvData[] = {"ChangeThisData"}; /* Example of character data */ /* **** NOT USED **** */ //16byte UUID loading happens here //Look at <GapAdvertisingData.h> for rest of definition struct ApplicationData_t { //Byte 0: AppID High Byte //Byte 1: AppID Low Byte //Byte 2: sensor High Word //Byte 3: //Byte 4: //Byte 5: sensor Low Byte //app ID is 16 bit, (0xFEFE) uint16_t applicationSpecificId; /* An ID used to identify temperature value in the manufacture specific AD data field */ //float = 32-bit. //tsai: change this to uint32_t!!! TMP_nrf51::TempSensorValue_t tmpSensorValue; /* this is a float (32-bit), user data */ } PACKED; void debounce_Callback(void) { tic_debounce.detach(); flag_set_debounce_tic = false; //not used flag_update_io = true; //start advertising /* Note that the buttonPressedCallback() executes in interrupt context, so it is safer to access * BLE device API from the main thread. */ //buttonState = PRESSED; } //----- button rising --- void buttonPressedCallback(void) { //flag_update_io = true; tic_debounce.attach(debounce_Callback, 1); //ok to attach multiple times, first one wins //buttonState = PRESSED; /* if (flag_set_debounce_tic == false) { flag_set_debounce_tic = true; } */ } //----- button falling --- void buttonReleasedCallback(void) { //flag_update_io = true; tic_debounce.attach(debounce_Callback, 1); } void stop_adv_Callback(void) { //stops advertising after X seconds /* Note that the Callback() executes in interrupt context, so it is safer to do * heavy-weight sensor polling from the main thread (where we should be able to block safely, if needed). */ //tic_adv.detach(); flag_detach_adv_tic = true; //ble.gap().stopAdvertising(); } void periodic_Callback(void) { flag_update_io = true; flag_periodic_call = true; } void setupApplicationData(ApplicationData_t &appData) { // two byte ID: 0xFEFE static const uint16_t APP_SPECIFIC_ID_TEST = 0xFEFE; //2 byte application ID appData.applicationSpecificId = APP_SPECIFIC_ID_TEST; //appData.tmpSensorValue = tempSensor.get(); appData.tmpSensorValue = mySensor; } /** * This function is called when the ble initialization process has failled */ void onBleInitError(BLE &ble, ble_error_t error) { /* Initialization error handling should go here */ } /** * Callback triggered when the ble initialization process has finished */ void bleInitComplete(BLE::InitializationCompleteCallbackContext *params) { BLE& ble = params->ble; ble_error_t error = params->error; if (error != BLE_ERROR_NONE) { /* In case of error, forward the error handling to onBleInitError */ onBleInitError(ble, error); return; } /* Ensure that it is the default instance of BLE */ if(ble.getInstanceID() != BLE::DEFAULT_INSTANCE) { return; } /* Set device name characteristic data */ ble.gap().setDeviceName((const uint8_t *) DEVICE_NAME); /* Setup advertising payload */ //set modes "no EDR", "discoverable" for beacon type advertisements ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::BREDR_NOT_SUPPORTED | GapAdvertisingData::LE_GENERAL_DISCOVERABLE); //set device profile in ADV/GATT //ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::GENERIC_THERMOMETER); //set advertising data (ADV data) //ApplicationData_t appData; //setupApplicationData(appData); //in /BLE_API/ble/GapAdvertisingData.h: sets payload (uuid) //ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::MANUFACTURER_SPECIFIC_DATA, (uint8_t *)&appData, sizeof(ApplicationData_t)); //from GAP example /* Sacrifice 2B of 31B to AdvType overhead, rest goes to AdvData array you define */ ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::MANUFACTURER_SPECIFIC_DATA, AdvData, sizeof(AdvData)); /* Setup advertising parameters: not connectable */ ble.gap().setAdvertisingType(GapAdvertisingParams::ADV_NON_CONNECTABLE_UNDIRECTED); ble.gap().setAdvertisingInterval(300); //one advertisment every 300ms. Self tickers, so you don't have to worry. //don't start advertising on init. Only advertise on pin interrupt. //ble.gap().startAdvertising(); } //https://developer.mbed.org/users/MarceloSalazar/notebook/measuring-battery-voltage-with-nordic-nrf51x/ void my_analogin_init(void) { NRF_ADC->ENABLE = ADC_ENABLE_ENABLE_Enabled; NRF_ADC->CONFIG = (ADC_CONFIG_RES_10bit << ADC_CONFIG_RES_Pos) | (ADC_CONFIG_INPSEL_SupplyOneThirdPrescaling << ADC_CONFIG_INPSEL_Pos) | (ADC_CONFIG_REFSEL_VBG << ADC_CONFIG_REFSEL_Pos) | (ADC_CONFIG_PSEL_Disabled << ADC_CONFIG_PSEL_Pos) | (ADC_CONFIG_EXTREFSEL_None << ADC_CONFIG_EXTREFSEL_Pos); } uint16_t my_analogin_read_u16(void) { NRF_ADC->CONFIG &= ~ADC_CONFIG_PSEL_Msk; NRF_ADC->CONFIG |= ADC_CONFIG_PSEL_Disabled << ADC_CONFIG_PSEL_Pos; NRF_ADC->TASKS_START = 1; //while loop doesn't actually loop until reading comlete, use a wait. while (((NRF_ADC->BUSY & ADC_BUSY_BUSY_Msk) >> ADC_BUSY_BUSY_Pos) == ADC_BUSY_BUSY_Busy) {}; wait_ms(2); //save off RESULT before disabling. //uint16_t myresult = (uint16_t)NRF_ADC->RESULT; //disable ADC to lower bat consumption //NRF_ADC->TASKS_STOP = 1; //NRF_ADC->ENABLE = ADC_ENABLE_ENABLE_Disabled; //disable to shutdown ADC & lower bat consumption return (uint16_t)NRF_ADC->RESULT; // 10 bit //return myresult; } int main(void) { #if MyDebugEnb device.baud(9600); device.printf("started sensor node 36 "); device.printf("\r\n"); #endif Timer myTimer; //timed advertising myTimer.start(); AdvData[0] = 0x44; //D AdvData[1] = 0x45; //E AdvData[2] = 0x43; //C AdvData[3] = 0x22; //" AdvData[4] = 0x76; //V volt AdvData[5] = 0x6f; //o AdvData[6] = 0x22; //" AdvData[7] = 0x3a; //: AdvData[8] = 0x24; //3 # AdvData[9] = 0x24; //. # AdvData[10] = 0x24; //1 # AdvData[11] = 0x24; //1 # AdvData[12] = 0x2c; //, AdvData[13] = 0x22; //" mag AdvData[14] = 0x6d; //a AdvData[15] = 0x22; //" AdvData[16] = 0x3a; //: AdvData[17] = 0x24; //0 or 1, 30 or 31 button1.fall(buttonPressedCallback); button1.rise(buttonReleasedCallback); button1.mode(PullNone); button1.fall(NULL); button1.rise(NULL); BLE &ble = BLE::Instance(); ble.init(bleInitComplete); //debug uart //device.baud(115200); float bat_reading; //hold battery voltage reading (Vbg/Vcc) my_analogin_init();//routes band-gap to analog input /* SpinWait for initialization to complete. This is necessary because the * BLE object is used in the main loop below. */ while (ble.hasInitialized() == false) { /* spin loop */ } //every X seconds, sends period update, up to 1800 (30 minutes) tic_periodic.attach(periodic_Callback, 10); while (true) { uint16_t mySeconds =(uint16_t)(myTimer.read_ms()/1000); //problem: mySeconds is only 2 byte //reading the ADV value, only goes up to 0-255; //reading the uart: current time in seconds: -1782, goes negative. //need to be able to count 1800 seconds since that's the length of timer. #if MyDebugEnb device.printf("current time in seconds: %d \r\n", mySeconds); #endif //**** set which pin should be interrupt, set pullups *** //set both pins to pull-up, so they're not floating when we read state button1.mode(PullUp); button2.mode(PullUp); //wait_ms(300); //contact settle //AdvData[12] is automatically CR? why? //0x33 0x2E 0x33 0x32 0x13 // 3 . 3 2 CR //expect either button1 or button2 is grounded, b/c using SPDT reed switch //the "common" pin on the reed switch should be on GND uint8_t button1_state = button1.read(); uint8_t button2_state = button2.read(); //let's just update the pins on every wake. Insurance against const drain. //if state == 0, pin is grounded. Unset interrupt and float pin //set the other input if ( (button1_state == 0) && (button2_state == 1) ) { magnet_near = 1; //AdvData[4] = 0x11; //dont' set ADV data directly. Using json now, need spacing //button1.disable_irq() //don't know if disables IRQ on port or pin button1.fall(NULL); //disable interrupt button1.rise(NULL); //disable interrupt button1.mode(PullNone); //float pin to save battery //button2.disable_irq() //don't know if disables IRQ on port or pin button2.fall(buttonReleasedCallback); //disable interrupt button2.rise(buttonReleasedCallback); //disable interrupt button2.mode(PullUp); //float pin to save battery } else if ( (button1_state == 1) && (button2_state == 0) ) //assume other pin is open circuit { magnet_near = 0; //AdvData[4] = 0x22; //dont' set ADV data directly. Using json now, need spacing //button1.disable_irq() //don't know if disables IRQ on port or pin button1.fall(buttonReleasedCallback); //disable interrupt button1.rise(buttonReleasedCallback); //disable interrupt button1.mode(PullUp); //float pin to save battery //button2.disable_irq() //don't know if disables IRQ on port or pin button2.fall(NULL); //disable interrupt button2.rise(NULL); //disable interrupt button2.mode(PullNone); //float pin to save battery } else //odd state, shouldn't happen, suck battery and pullup both pins { magnet_near = 2; //AdvData[4] = 0x33; //button1.disable_irq() //don't know if disables IRQ on port or pin button1.fall(buttonReleasedCallback); //disable interrupt button1.rise(buttonReleasedCallback); //disable interrupt button1.mode(PullUp); //float pin to save battery //button2.disable_irq() //don't know if disables IRQ on port or pin button2.fall(buttonReleasedCallback); //disable interrupt button2.rise(buttonReleasedCallback); //disable interrupt button2.mode(PullUp); //float pin to save battery } if (flag_update_io) { /* Do blocking calls or whatever hardware-specific action is * necessary to poll the sensor. */ //analog reading consumes 940uA if not disabled bat_reading = (float)my_analogin_read_u16(); bat_reading = (bat_reading * 3.6) / 1024.0; #if MyDebugEnb device.printf("bat reading: %f \r\n", bat_reading); #endif //memset(&buffer[0], 0, sizeof(buffer)); //clear out buffer //sprintf (buffer, "%f.2", bat_reading); //don't know what i'm doing //sprintf (buffer, "%.2f", bat_reading); //AdvData[8] = buffer[0]; //"3"=0x33 //AdvData[9] = buffer[1]; //"."=0x2E //AdvData[10] = buffer[2];//"3"=0x33 //AdvData[11] = buffer[3];//"2"=0x32 //disable ADC NRF_ADC->TASKS_STOP = 1; NRF_ADC->ENABLE = ADC_ENABLE_ENABLE_Disabled; //disable to shutdown ADC & lower bat consumption //*********************************** //form JSON string in ADV_DATA //1) volts starts at AdvData[8] memset(&AdvData[0], 0, sizeof(AdvData)); uint8_t JSON_loc=0; //DEC"vo": <--- AdvData[JSON_loc] = 0x44; //D JSON_loc++; AdvData[JSON_loc] = 0x45; //E JSON_loc++; AdvData[JSON_loc] = 0x43; //C JSON_loc++; AdvData[JSON_loc] = mySeconds & 0xFF; //reserved for timer JSON_loc++; AdvData[JSON_loc] = (mySeconds >> 8) & 0xFF;; //reserved for timer JSON_loc++; AdvData[JSON_loc] = 0x22; //" JSON_loc++; AdvData[JSON_loc] = 0x76; //V volt JSON_loc++; AdvData[JSON_loc] = 0x6f; //o JSON_loc++; AdvData[JSON_loc] = 0x6C; //l JSON_loc++; AdvData[JSON_loc] = 0x74; //t JSON_loc++; AdvData[JSON_loc] = 0x22; //" JSON_loc++; AdvData[JSON_loc] = 0x3a; //: JSON_loc++; //write battery voltage uint8_t total_chars; memset(&buffer[0], 0, sizeof(buffer)); //clear out buffer total_chars = sprintf (buffer, "%.2f", bat_reading); //returns total number of characters #if MyDebugEnb device.printf("char buff: %c%c%c%c \r\n", buffer[0], buffer[1], buffer[2], buffer[3]); device.printf("num chars: %d \r\n", total_chars); #endif for (int i=0; i < total_chars; i++) { AdvData[JSON_loc] = buffer[i]; JSON_loc++; #if MyDebugEnb device.printf("JSON_loc: %d buf[]:%c \r\n", JSON_loc, buffer[i]); #endif } //JSON_loc left at location of next character //DEC"vo":3.11," AdvData[JSON_loc] = 0x2c; //, JSON_loc++; AdvData[JSON_loc] = 0x22; //" start mag JSON_loc++; AdvData[JSON_loc] = 0x6d; //m JSON_loc++; AdvData[JSON_loc] = 0x61; //a JSON_loc++; AdvData[JSON_loc] = 0x67; //g JSON_loc++; if (flag_periodic_call) { //AdvData[JSON_loc] = 0x2f; // "/" //JSON_loc++; AdvData[JSON_loc] = 0x2f; // "/" JSON_loc++; AdvData[JSON_loc] = 0x70; // "p" JSON_loc++; }//end if period call AdvData[JSON_loc] = 0x22; //" JSON_loc++; AdvData[JSON_loc] = 0x3a; //: JSON_loc++; //prep magnet location (1 or 0) for char[] memset(&buffer[0], 0, sizeof(buffer)); //clear out buffer //magnet_near is an integer total_chars = sprintf (buffer, "%d", magnet_near); //returns total number of characters for (int i=0; i < total_chars; i++) { AdvData[JSON_loc] = buffer[i]; JSON_loc++; } //JSON_loc left at location of next character //MUST null terminate for JSON to read correctly, else get intermittent JSON parse errors at gateway //happens when string is shorter than last string, get trash left overs //not really needed after clearning AdvData at start. //AdvData[JSON_loc] = 0x0; //null terminate here ApplicationData_t appData; setupApplicationData(appData); for (int i=0; i<16; i++) { src_buf[i] = AdvData[i+3]; } //nrf_ecb_set_key(key_buf); nrf_ecb_init(); nrf_ecb_set_key(key_buf); bool successful_ecb = nrf_ecb_crypt(des_buf, src_buf); #if MyDebugEnb device.printf("success ecb = %d \r\n", successful_ecb); device.printf("src_buf: %x %x %x %x %x %x %x %x %x %x %x %x %x %x %x %x \r\n", src_buf[0], src_buf[1], src_buf[2], src_buf[3], src_buf[4], src_buf[5], src_buf[6], src_buf[7], src_buf[8], src_buf[9], src_buf[10], src_buf[11], src_buf[12], src_buf[13], src_buf[14], src_buf[15]); device.printf("des_buf: %x %x %x %x %x %x %x %x %x %x %x %x %x %x %x %x \r\n", des_buf[0], des_buf[1], des_buf[2], des_buf[3], des_buf[4], des_buf[5], des_buf[6], des_buf[7], des_buf[8], des_buf[9], des_buf[10], des_buf[11], des_buf[12], des_buf[13], des_buf[14], des_buf[15]); #endif for (int i=0; i<16; i++) { AdvData[i+3] = des_buf[i]; } //ble.gap().updateAdvertisingPayload(GapAdvertisingData::MANUFACTURER_SPECIFIC_DATA, (uint8_t *) &appData, sizeof(ApplicationData_t)); ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::MANUFACTURER_SPECIFIC_DATA, AdvData, sizeof(AdvData)); flag_update_io = false; flag_periodic_call = false; //GAP::AddressType_t *myType; //GAP::Address_t myAddress //ble_error_t getAddress(Gap::AddressType_t *typeP, Gap::Address_t address) //ble.gap().getAddress(myType, myAddress); //ble.gap().getAddress(Gap::AddressType_t *typeP, Gap::Address_t address); uint8_t mac[6] = {0x0,0x0,0x0,0x0,0x0,0x0}; ble.getAddress(0,mac); //NOTE: last byte of MAC (as shown on phone app) is at mac[0], not mac[6]; #if MyDebugEnb device.printf("mac = "); for (int i=0; i<6; i++) { device.printf("%x:", mac[i]); } device.printf("\r\n"); #endif ble.gap().startAdvertising(); tic_adv.attach(stop_adv_Callback, 2); /* trigger turn off advertisement after X seconds */ /* Timer myTimer; //timed advertising myTimer.start(); uint32_t duration = myTimer.read_ms(); //do this as a ticker instead of keeping processor on while (duration < 15000) //advertise for 1000 ms { duration = myTimer.read_ms(); //read miliseconds } myTimer.stop(); ble.gap().stopAdvertising(); */ }//end flag_update_io /* if (flag_set_debounce_tic == true) { tic_debounce.attach(); //flag_set_debounce_tic = false; } */ //if (trigger_Detach_ADV_Tick == false) //{ //} if (flag_detach_adv_tic == true) //Stop Advertising { ble.gap().stopAdvertising(); //may be safer to execute BLE operations in main tic_adv.detach(); flag_detach_adv_tic = false; } //device.printf("Input Voltage: %f\n\r",bat_reading); ble.waitForEvent(); //sleeps until interrupt }//end forever while }//end main