works
Dependencies: BLE_nRF8001 DebounceIn mbed mbed_BLEtry2
Fork of mbed_BLEfinal by
main.cpp@1:d356fed1a9fa, 2015-03-31 (annotated)
- Committer:
- sitakumar
- Date:
- Tue Mar 31 20:44:42 2015 +0000
- Revision:
- 1:d356fed1a9fa
- Parent:
- 0:11e1f075d0d2
- Child:
- 2:f4cedbb71ef9
pH works but temp doesnt
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
sitakumar | 0:11e1f075d0d2 | 1 | #include "mbed.h" |
sitakumar | 0:11e1f075d0d2 | 2 | #include "BLEPeripheral.h" |
sitakumar | 0:11e1f075d0d2 | 3 | |
sitakumar | 0:11e1f075d0d2 | 4 | //serial connection via USB |
sitakumar | 0:11e1f075d0d2 | 5 | Serial serial(USBTX, USBRX); |
sitakumar | 0:11e1f075d0d2 | 6 | |
sitakumar | 0:11e1f075d0d2 | 7 | //Declare Input and Output pins |
sitakumar | 0:11e1f075d0d2 | 8 | DigitalIn pb(D3); |
sitakumar | 0:11e1f075d0d2 | 9 | AnalogIn pH_sensor(A0); |
sitakumar | 0:11e1f075d0d2 | 10 | InterruptIn button(D2); |
sitakumar | 0:11e1f075d0d2 | 11 | DigitalOut led(LED_RED); |
sitakumar | 0:11e1f075d0d2 | 12 | |
sitakumar | 0:11e1f075d0d2 | 13 | // The SPI construct, REQN and RDYN IO construct should be modified manually |
sitakumar | 0:11e1f075d0d2 | 14 | // It depend on the board you are using and the REQN&RDYN configuration on BLE Shield |
sitakumar | 0:11e1f075d0d2 | 15 | SPI spi(PTD2, PTD3, PTD1); |
sitakumar | 0:11e1f075d0d2 | 16 | DigitalInOut BLE_RDY(PTD5); |
sitakumar | 0:11e1f075d0d2 | 17 | DigitalInOut BLE_REQ(PTD0); |
sitakumar | 0:11e1f075d0d2 | 18 | DigitalInOut BLE_RESET(PTA13); |
sitakumar | 0:11e1f075d0d2 | 19 | |
sitakumar | 0:11e1f075d0d2 | 20 | //for BLE |
sitakumar | 0:11e1f075d0d2 | 21 | int count = 0; |
sitakumar | 0:11e1f075d0d2 | 22 | unsigned char txbuf[16] = {0}; |
sitakumar | 0:11e1f075d0d2 | 23 | unsigned char txlen = 0; |
sitakumar | 0:11e1f075d0d2 | 24 | |
sitakumar | 0:11e1f075d0d2 | 25 | /*----- BLE Utility -------------------------------------------------------------------------*/ |
sitakumar | 0:11e1f075d0d2 | 26 | // create peripheral instance, see pinouts above |
sitakumar | 0:11e1f075d0d2 | 27 | BLEPeripheral blePeripheral = BLEPeripheral(&BLE_REQ, &BLE_RDY, NULL); |
sitakumar | 0:11e1f075d0d2 | 28 | |
sitakumar | 0:11e1f075d0d2 | 29 | // create service |
sitakumar | 0:11e1f075d0d2 | 30 | BLEService uartService = BLEService("713d0000503e4c75ba943148f18d941e"); |
sitakumar | 0:11e1f075d0d2 | 31 | |
sitakumar | 0:11e1f075d0d2 | 32 | // create characteristic |
sitakumar | 0:11e1f075d0d2 | 33 | //BLECharacteristic txCharacteristic = BLECharacteristic("713d0002503e4c75ba943148f18d941e", BLENotify, 20); |
sitakumar | 0:11e1f075d0d2 | 34 | BLECharacteristic rxCharacteristic = BLECharacteristic("713d0003503e4c75ba943148f18d941e", BLENotify, 20); |
sitakumar | 0:11e1f075d0d2 | 35 | /*--------------------------------------------------------------------------------------------*/ |
sitakumar | 0:11e1f075d0d2 | 36 | |
sitakumar | 0:11e1f075d0d2 | 37 | unsigned int interval = 0; |
sitakumar | 0:11e1f075d0d2 | 38 | unsigned char count_on = 0; |
sitakumar | 0:11e1f075d0d2 | 39 | |
sitakumar | 0:11e1f075d0d2 | 40 | //for pH measurement |
sitakumar | 0:11e1f075d0d2 | 41 | int calib = 0; |
sitakumar | 0:11e1f075d0d2 | 42 | int avgReading = 0; |
sitakumar | 0:11e1f075d0d2 | 43 | bool calibrationORnot = true; |
sitakumar | 0:11e1f075d0d2 | 44 | bool ready = false; |
sitakumar | 0:11e1f075d0d2 | 45 | int* reading[] = {0,0}; |
sitakumar | 0:11e1f075d0d2 | 46 | |
sitakumar | 0:11e1f075d0d2 | 47 | |
sitakumar | 0:11e1f075d0d2 | 48 | //This loop takes a reading by taking 15 measurements and averaging them when it is called in the loop "measure" |
sitakumar | 0:11e1f075d0d2 | 49 | int takeReading() |
sitakumar | 0:11e1f075d0d2 | 50 | { |
sitakumar | 0:11e1f075d0d2 | 51 | double totalVal = 0.0; |
sitakumar | 0:11e1f075d0d2 | 52 | double pH_sensor_read = 0.0; |
sitakumar | 0:11e1f075d0d2 | 53 | int totalReadings = 0; |
sitakumar | 0:11e1f075d0d2 | 54 | while(totalReadings < 16){ |
sitakumar | 0:11e1f075d0d2 | 55 | pH_sensor_read = pH_sensor.read(); |
sitakumar | 0:11e1f075d0d2 | 56 | totalVal = totalVal + pH_sensor_read; |
sitakumar | 0:11e1f075d0d2 | 57 | totalReadings++; |
sitakumar | 0:11e1f075d0d2 | 58 | } |
sitakumar | 0:11e1f075d0d2 | 59 | int avgSensor = totalVal/15; |
sitakumar | 0:11e1f075d0d2 | 60 | return avgSensor; |
sitakumar | 0:11e1f075d0d2 | 61 | } |
sitakumar | 0:11e1f075d0d2 | 62 | |
sitakumar | 0:11e1f075d0d2 | 63 | void calibration() |
sitakumar | 0:11e1f075d0d2 | 64 | { |
sitakumar | 0:11e1f075d0d2 | 65 | serial.printf("enter calibration loop\n"); |
sitakumar | 0:11e1f075d0d2 | 66 | //Loop to take calibration value |
sitakumar | 0:11e1f075d0d2 | 67 | calib = takeReading(); |
sitakumar | 0:11e1f075d0d2 | 68 | serial.printf("calib is %d\n", calib); |
sitakumar | 0:11e1f075d0d2 | 69 | } |
sitakumar | 0:11e1f075d0d2 | 70 | |
sitakumar | 0:11e1f075d0d2 | 71 | void calculate() |
sitakumar | 0:11e1f075d0d2 | 72 | { |
sitakumar | 0:11e1f075d0d2 | 73 | serial.printf("entered calc\n"); |
sitakumar | 0:11e1f075d0d2 | 74 | //Take average of readings over 10 seconds |
sitakumar | 0:11e1f075d0d2 | 75 | avgReading = takeReading(); |
sitakumar | 0:11e1f075d0d2 | 76 | serial.printf("took reading\n"); |
sitakumar | 0:11e1f075d0d2 | 77 | ready = true; |
sitakumar | 0:11e1f075d0d2 | 78 | } |
sitakumar | 0:11e1f075d0d2 | 79 | |
sitakumar | 0:11e1f075d0d2 | 80 | void measure() |
sitakumar | 0:11e1f075d0d2 | 81 | { |
sitakumar | 0:11e1f075d0d2 | 82 | serial.baud(115200); |
sitakumar | 0:11e1f075d0d2 | 83 | serial.printf("start measurement"); |
sitakumar | 0:11e1f075d0d2 | 84 | //cb.mode(PullUp); |
sitakumar | 0:11e1f075d0d2 | 85 | if(calibrationORnot) |
sitakumar | 0:11e1f075d0d2 | 86 | { |
sitakumar | 0:11e1f075d0d2 | 87 | calibration(); |
sitakumar | 0:11e1f075d0d2 | 88 | calibrationORnot = !calibrationORnot; |
sitakumar | 0:11e1f075d0d2 | 89 | } |
sitakumar | 0:11e1f075d0d2 | 90 | //Loop to take measurement |
sitakumar | 0:11e1f075d0d2 | 91 | else if(!calibrationORnot) |
sitakumar | 0:11e1f075d0d2 | 92 | { |
sitakumar | 0:11e1f075d0d2 | 93 | serial.printf("enter measurement loop\n"); |
sitakumar | 0:11e1f075d0d2 | 94 | serial.printf("calib is %d\n", calib); |
sitakumar | 0:11e1f075d0d2 | 95 | calculate(); |
sitakumar | 0:11e1f075d0d2 | 96 | } |
sitakumar | 0:11e1f075d0d2 | 97 | } |
sitakumar | 0:11e1f075d0d2 | 98 | |
sitakumar | 0:11e1f075d0d2 | 99 | |
sitakumar | 0:11e1f075d0d2 | 100 | int main() |
sitakumar | 0:11e1f075d0d2 | 101 | { |
sitakumar | 0:11e1f075d0d2 | 102 | pb.mode(PullUp); |
sitakumar | 0:11e1f075d0d2 | 103 | serial.baud(115200); |
sitakumar | 0:11e1f075d0d2 | 104 | serial.printf("Hello SmartD!\n"); |
sitakumar | 0:11e1f075d0d2 | 105 | serial.printf("Serial begin!\r\n"); |
sitakumar | 0:11e1f075d0d2 | 106 | int pH,yint,tempC,tempF; |
sitakumar | 0:11e1f075d0d2 | 107 | |
sitakumar | 0:11e1f075d0d2 | 108 | /*----- BLE Utility ---------------------------------------------*/ |
sitakumar | 0:11e1f075d0d2 | 109 | // set advertised local name and service UUID |
sitakumar | 0:11e1f075d0d2 | 110 | blePeripheral.setLocalName("Sita"); |
sitakumar | 0:11e1f075d0d2 | 111 | |
sitakumar | 0:11e1f075d0d2 | 112 | blePeripheral.setAdvertisedServiceUuid(uartService.uuid()); |
sitakumar | 0:11e1f075d0d2 | 113 | |
sitakumar | 0:11e1f075d0d2 | 114 | // add service and characteristic |
sitakumar | 0:11e1f075d0d2 | 115 | blePeripheral.addAttribute(uartService); |
sitakumar | 0:11e1f075d0d2 | 116 | blePeripheral.addAttribute(rxCharacteristic); |
sitakumar | 0:11e1f075d0d2 | 117 | //blePeripheral.addAttribute(txCharacteristic); |
sitakumar | 0:11e1f075d0d2 | 118 | |
sitakumar | 0:11e1f075d0d2 | 119 | // begin initialization |
sitakumar | 0:11e1f075d0d2 | 120 | blePeripheral.begin(); |
sitakumar | 0:11e1f075d0d2 | 121 | /*---------------------------------------------------------------*/ |
sitakumar | 0:11e1f075d0d2 | 122 | |
sitakumar | 0:11e1f075d0d2 | 123 | //serial.printf("GOT IT pH is %d, Temp is %d\n\r", reading[0], reading[1]); |
sitakumar | 0:11e1f075d0d2 | 124 | serial.printf("BLE UART Peripheral begin!\r\n"); |
sitakumar | 0:11e1f075d0d2 | 125 | if (calibrationORnot) |
sitakumar | 0:11e1f075d0d2 | 126 | { |
sitakumar | 0:11e1f075d0d2 | 127 | button.rise(&measure); |
sitakumar | 0:11e1f075d0d2 | 128 | } |
sitakumar | 0:11e1f075d0d2 | 129 | |
sitakumar | 0:11e1f075d0d2 | 130 | while(1) |
sitakumar | 0:11e1f075d0d2 | 131 | { |
sitakumar | 0:11e1f075d0d2 | 132 | //serial.printf("GOT IT pH is %d, Temp is %d\n\r", reading[0], reading[1]); |
sitakumar | 0:11e1f075d0d2 | 133 | BLECentral central = blePeripheral.central(); |
sitakumar | 0:11e1f075d0d2 | 134 | if (ready) |
sitakumar | 0:11e1f075d0d2 | 135 | { |
sitakumar | 0:11e1f075d0d2 | 136 | //calcuating yintercept of the ADC -> pH equation using calibration value and given that calibration liquid is pH4 |
sitakumar | 0:11e1f075d0d2 | 137 | yint = (68.97*calib)-4; |
sitakumar | 0:11e1f075d0d2 | 138 | serial.printf("yint is %f", yint); |
sitakumar | 0:11e1f075d0d2 | 139 | //assumes linear relationship between pin readout -> voltage ->pH |
sitakumar | 0:11e1f075d0d2 | 140 | pH = (0.0209*3300)*(avgReading)-yint; |
sitakumar | 0:11e1f075d0d2 | 141 | //conversion to degrees C from sensor output voltage |
sitakumar | 0:11e1f075d0d2 | 142 | tempC = (((3000*avgReading/1000) - 1.022129)/-0.0018496); |
sitakumar | 0:11e1f075d0d2 | 143 | tempF = (tempC *9/5) + 32; |
sitakumar | 0:11e1f075d0d2 | 144 | //print current pH and temp |
sitakumar | 0:11e1f075d0d2 | 145 | serial.printf("pH = %5.2d & temp = %5.2d F\n\r", pH, tempF); |
sitakumar | 0:11e1f075d0d2 | 146 | ready = !ready; |
sitakumar | 0:11e1f075d0d2 | 147 | } |
sitakumar | 0:11e1f075d0d2 | 148 | if (central) |
sitakumar | 0:11e1f075d0d2 | 149 | { |
sitakumar | 0:11e1f075d0d2 | 150 | // central connected to peripheral |
sitakumar | 0:11e1f075d0d2 | 151 | serial.printf("Connected to central\r\n"); |
sitakumar | 0:11e1f075d0d2 | 152 | while (central.connected()) |
sitakumar | 0:11e1f075d0d2 | 153 | { |
sitakumar | 0:11e1f075d0d2 | 154 | if (!pb) // if button pushed |
sitakumar | 0:11e1f075d0d2 | 155 | { |
sitakumar | 0:11e1f075d0d2 | 156 | serial.printf("pH is %d, Temp is %d\n\r", pH, tempF); |
sitakumar | 0:11e1f075d0d2 | 157 | // Read and send out pH value from measure function |
sitakumar | 1:d356fed1a9fa | 158 | unsigned int value = pH; |
sitakumar | 1:d356fed1a9fa | 159 | serial.printf("VALUE IS %d\n\r", value); |
sitakumar | 1:d356fed1a9fa | 160 | const unsigned char val[1] = {value}; |
sitakumar | 1:d356fed1a9fa | 161 | serial.printf("VALUE AFTER IS %d\n\r", val[1]); |
sitakumar | 1:d356fed1a9fa | 162 | rxCharacteristic.setValue(val,1); |
sitakumar | 0:11e1f075d0d2 | 163 | unsigned int value2 = tempF; |
sitakumar | 0:11e1f075d0d2 | 164 | serial.printf("VALUE FIRST IS %d\n\r", value2); |
sitakumar | 0:11e1f075d0d2 | 165 | const unsigned char val2[1] = {value2}; |
sitakumar | 0:11e1f075d0d2 | 166 | serial.printf("VALUE AFTER IS %d\n\r", val2[1]); |
sitakumar | 0:11e1f075d0d2 | 167 | rxCharacteristic.setValue(val2,1); |
sitakumar | 0:11e1f075d0d2 | 168 | |
sitakumar | 0:11e1f075d0d2 | 169 | } |
sitakumar | 0:11e1f075d0d2 | 170 | } |
sitakumar | 0:11e1f075d0d2 | 171 | |
sitakumar | 0:11e1f075d0d2 | 172 | // central disconnected |
sitakumar | 0:11e1f075d0d2 | 173 | serial.printf("Disconnected from central\r\n"); |
sitakumar | 0:11e1f075d0d2 | 174 | } |
sitakumar | 0:11e1f075d0d2 | 175 | } |
sitakumar | 0:11e1f075d0d2 | 176 | } |