Sita Kumar
Dependencies: BLE_nRF8001 DebounceIn mbed
Revision 0:11e1f075d0d2, committed 2015-03-31
- Comitter:
- sitakumar
- Date:
- Tue Mar 31 20:39:50 2015 +0000
- Commit message:
- 3/31
Changed in this revision
diff -r 000000000000 -r 11e1f075d0d2 BLE_nRF8001.lib --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/BLE_nRF8001.lib Tue Mar 31 20:39:50 2015 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/teams/RedBearLab/code/BLE_nRF8001/#e9a412d69201
diff -r 000000000000 -r 11e1f075d0d2 DebounceIn.lib --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/DebounceIn.lib Tue Mar 31 20:39:50 2015 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/AjK/code/DebounceIn/#31ae5cfb44a4
diff -r 000000000000 -r 11e1f075d0d2 main.cpp
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Tue Mar 31 20:39:50 2015 +0000
@@ -0,0 +1,176 @@
+#include "mbed.h"
+#include "BLEPeripheral.h"
+
+//serial connection via USB
+Serial serial(USBTX, USBRX);
+
+//Declare Input and Output pins
+DigitalIn pb(D3);
+AnalogIn pH_sensor(A0);
+InterruptIn button(D2);
+DigitalOut led(LED_RED);
+
+// The SPI construct, REQN and RDYN IO construct should be modified manually
+// It depend on the board you are using and the REQN&RDYN configuration on BLE Shield
+SPI spi(PTD2, PTD3, PTD1);
+DigitalInOut BLE_RDY(PTD5);
+DigitalInOut BLE_REQ(PTD0);
+DigitalInOut BLE_RESET(PTA13);
+
+//for BLE
+int count = 0;
+unsigned char txbuf[16] = {0};
+unsigned char txlen = 0;
+
+/*----- BLE Utility -------------------------------------------------------------------------*/
+// create peripheral instance, see pinouts above
+BLEPeripheral blePeripheral = BLEPeripheral(&BLE_REQ, &BLE_RDY, NULL);
+
+// create service
+BLEService uartService = BLEService("713d0000503e4c75ba943148f18d941e");
+
+// create characteristic
+//BLECharacteristic txCharacteristic = BLECharacteristic("713d0002503e4c75ba943148f18d941e", BLENotify, 20);
+BLECharacteristic rxCharacteristic = BLECharacteristic("713d0003503e4c75ba943148f18d941e", BLENotify, 20);
+/*--------------------------------------------------------------------------------------------*/
+
+unsigned int interval = 0;
+unsigned char count_on = 0;
+
+//for pH measurement
+int calib = 0;
+int avgReading = 0;
+bool calibrationORnot = true;
+bool ready = false;
+int* reading[] = {0,0};
+
+
+//This loop takes a reading by taking 15 measurements and averaging them when it is called in the loop "measure"
+int takeReading()
+{
+ double totalVal = 0.0;
+ double pH_sensor_read = 0.0;
+ int totalReadings = 0;
+ while(totalReadings < 16){
+ pH_sensor_read = pH_sensor.read();
+ totalVal = totalVal + pH_sensor_read;
+ totalReadings++;
+ }
+ int avgSensor = totalVal/15;
+ return avgSensor;
+ }
+
+void calibration()
+{
+ serial.printf("enter calibration loop\n");
+ //Loop to take calibration value
+ calib = takeReading();
+ serial.printf("calib is %d\n", calib);
+}
+
+void calculate()
+{
+ serial.printf("entered calc\n");
+ //Take average of readings over 10 seconds
+ avgReading = takeReading();
+ serial.printf("took reading\n");
+ ready = true;
+}
+
+void measure()
+{
+ serial.baud(115200);
+ serial.printf("start measurement");
+ //cb.mode(PullUp);
+ if(calibrationORnot)
+ {
+ calibration();
+ calibrationORnot = !calibrationORnot;
+ }
+//Loop to take measurement
+ else if(!calibrationORnot)
+ {
+ serial.printf("enter measurement loop\n");
+ serial.printf("calib is %d\n", calib);
+ calculate();
+ }
+}
+
+
+int main()
+{
+ pb.mode(PullUp);
+ serial.baud(115200);
+ serial.printf("Hello SmartD!\n");
+ serial.printf("Serial begin!\r\n");
+ int pH,yint,tempC,tempF;
+
+ /*----- BLE Utility ---------------------------------------------*/
+ // set advertised local name and service UUID
+ blePeripheral.setLocalName("Sita");
+
+ blePeripheral.setAdvertisedServiceUuid(uartService.uuid());
+
+ // add service and characteristic
+ blePeripheral.addAttribute(uartService);
+ blePeripheral.addAttribute(rxCharacteristic);
+ //blePeripheral.addAttribute(txCharacteristic);
+
+ // begin initialization
+ blePeripheral.begin();
+ /*---------------------------------------------------------------*/
+
+ //serial.printf("GOT IT pH is %d, Temp is %d\n\r", reading[0], reading[1]);
+ serial.printf("BLE UART Peripheral begin!\r\n");
+ if (calibrationORnot)
+ {
+ button.rise(&measure);
+ }
+
+ while(1)
+ {
+ //serial.printf("GOT IT pH is %d, Temp is %d\n\r", reading[0], reading[1]);
+ BLECentral central = blePeripheral.central();
+ if (ready)
+ {
+ //calcuating yintercept of the ADC -> pH equation using calibration value and given that calibration liquid is pH4
+ yint = (68.97*calib)-4;
+ serial.printf("yint is %f", yint);
+ //assumes linear relationship between pin readout -> voltage ->pH
+ pH = (0.0209*3300)*(avgReading)-yint;
+ //conversion to degrees C from sensor output voltage
+ tempC = (((3000*avgReading/1000) - 1.022129)/-0.0018496);
+ tempF = (tempC *9/5) + 32;
+ //print current pH and temp
+ serial.printf("pH = %5.2d & temp = %5.2d F\n\r", pH, tempF);
+ ready = !ready;
+ }
+ if (central)
+ {
+ // central connected to peripheral
+ serial.printf("Connected to central\r\n");
+ while (central.connected())
+ {
+ if (!pb) // if button pushed
+ {
+ serial.printf("pH is %d, Temp is %d\n\r", pH, tempF);
+ // Read and send out pH value from measure function
+ //unsigned int value = pH;
+// serial.printf("VALUE IS %d\n\r", value);
+// const unsigned char val[1] = {value};
+// serial.printf("VALUE AFTER IS %d\n\r", val[1]);
+// rxCharacteristic.setValue(val,1);
+ unsigned int value2 = tempF;
+ serial.printf("VALUE FIRST IS %d\n\r", value2);
+ const unsigned char val2[1] = {value2};
+ serial.printf("VALUE AFTER IS %d\n\r", val2[1]);
+ rxCharacteristic.setValue(val2,1);
+
+ }
+ }
+
+ // central disconnected
+ serial.printf("Disconnected from central\r\n");
+ }
+ }
+}
\ No newline at end of file
diff -r 000000000000 -r 11e1f075d0d2 mbed.lib --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed.lib Tue Mar 31 20:39:50 2015 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/mbed_official/code/mbed/#487b796308b0