SunTracker_BLE

Dependencies:   BLE_API X_NUCLEO_6180XA1 X_NUCLEO_IDB0XA1 X_NUCLEO_IHM01A1 X_NUCLEO_IKS01A1 mbed

Fork of SunTracker_BLE by ST Expansion SW Team

Overview

The SunTracker is a demo application running on ST Nucleo-F401RE stacking a set of ST X-NUCLEO expansion boards.
Main features provided are:

  • A solar panel follows the light source, orienting the panel in order to achieve the best panel efficiency.
  • Orientation is controlled thanks to a couple of VL6180X FlightSense light sensors mounted on a X-NUCLEO-6180XA1 expansion board and driven by X-NUCLEO-IHM01A1 controlled stepper motor acting as actuator to orientate the panel.
  • The system features a progressive control on the stepper motor in order to modulate the panel rotation speed according to the light angle.
  • The application is also able to control the panel productivity reading the panel voltage through an ADC and proving feedback on the local display.
  • A manual orientation is possible by using the accelerometer on a X-NUCLEO-IKS01A1 expansion board that, according on board tilt, controls the speed and the rotate direction.
  • A remote control is available using a X-NUCLEO-IDB04A1 or a X-NUCLEO-IDB05A1 Bluetooth Low Energy expansion board. Remote control software is here.

/media/uploads/fabiombed/suntracker_server-client.png

Working Status

  • SunTracker has 3 working status visible on FlightSense display and switchable by pressing the User Button:

Status 0 (Idle)

  • Motor: Free Turning
  • Display: Waiting for User Button

Status 1

  • Motor: Driven by Light
  • Display: Direction and Light Intensity = Direction and Motor Speed

Status 2

  • Motor: Driven by Light
  • Display: Solar Panel Efficiency

Status 3

  • Motor: Driven by Accelerometer
  • Display: Direction and Accelerometer Intensity

Server Startup

  • When you plug the power supply, the word ‘PUSH’ is shown on display.
  • You can manually rotate the structure to assign the ‘Zero Point’. Then press the User Button to launch the application.
  • The display will show this status, which means that the structure is oriented to maximize the efficiency of the solar panel.
  • If there is a light displacement, the structure will rotate, left or right, to follow the light source and on display is shown the direction and the speed.
  • You can press the User Button to show the panel efficiency with 4 digits that represent the range from 0v (0000) to 3,3v (3300).
  • Further pressing the User Button you will manual rotate the panel by tilt the Server or Client accelerometer depending by BLE connection.

Client Startup

  • The Client application can remotely control the User Button and the Accelerometer functions.
  • Power on the Client AFTER the Server, it will automatically search for the SunTracker and will establish a BLE connection.
  • The Green Led on Nucleo Client board will be powered on.

Rotation Features

  • It has been implemented a block of rotation to avoid cables twist.
  • The blocking point can be set in the firmware by changing a constant.
  • You can manually rotate the structure to assign the ‘Zero Point’ before press the User Button to launch the application.
  • The system features a progressive control on the stepper motor in order to modulate the rotation speed according to the light or accelerometer angle.

List of Components

SERVER SunTracker_BLE

  • Stepper Motor 400’’ (Part Number 5350401) - To orientate the Mechanical Structure.
  • Solar Panel 0.446w (Part Number 0194127) - To capture sunlight and generate electrical current.
  • Power Supply 12v (Part Number 7262993) - To provide power supply at the Stepper Motor.
  • Flat Cable 6 ways (Part Number 1807010) - To plug VL6180X-SATEL with X-NUCLEO-6180XA1 (60cm length each x2).
  • Cable Connector (Part Number 6737694) - To plug the Flat Cable (x4).
  • Power Connector (Part Number 0487842) - To provide Power Supply to X-NUCLEO-IHM01A1.

CLIENT SunTracker_BLE_Remote

MECHANICAL STRUCTURE

Find here the STL files to print with a 3D printer.

/media/uploads/fabiombed/assembly.png

/media/uploads/fabiombed/mechanical_structure_and_motor_legs.png

FLAT CABLE ASSEMBLY

/media/uploads/fabiombed/flat_cable.png

HARDWARE SETUP

Nucleo ADC + Solar Panel

Connect Solar Panel cables to Nucleo Morpho PC_3 (white) and Nucleo Morpho GND (black). Connect a capacitor 10uF between PC_3 and GND to stabilize its voltage value shown on display.

EasySpin (L6474) + BLE

Hardware conflict between EasySpin DIR1 and BLE Reset, both on same Arduino Pin PA_8. Disconnect PA_8 between EasySpin and Nucleo by fold EasySpin Pin. PB_2 has been configured as EasySpin DIR1 in the firmware . Connect Nucleo Morpho PB_2 to FlightSense Arduino PA_8 by a wire.

FlightSense Satellites

In case of instability with I2C due to long flat cables, solder 4 SMD capacitors 47pF on FlightSense board in parallel between R15, R16, R17, R18 and plug 2 capacitors 15pF between FlightSense Arduino PB_8 and PB_9 to GND pin to cut-off noises over 720 KHz.

Arduino & Morpho Pinout

/media/uploads/fabiombed/arduino_pinout.png /media/uploads/fabiombed/morpho_pinout.png

Revision:
8:144855fe02bd
Parent:
7:54984d031243
Child:
9:ca289bf57f52
--- a/main.cpp	Wed Feb 10 12:52:55 2016 +0000
+++ b/main.cpp	Fri Feb 12 10:52:50 2016 +0000
@@ -61,6 +61,10 @@
 #include "debug.h" // Need for PRINTF
 #include "Utils.h" // Need for STORE_LE_16 and _32
 
+const unsigned   LENGTH_OF_LONG_UUID = 16;
+typedef uint16_t ShortUUIDBytes_t;
+typedef uint8_t  LongUUIDBytes_t[LENGTH_OF_LONG_UUID];
+
 typedef struct {
     int32_t AXIS_X;
     int32_t AXIS_Y;
@@ -70,21 +74,16 @@
 typedef enum ConnectionStatus_t {
     DISCONNECTED    =0,
     CONNECTED       =1
-}cns_t;
+} cns_t;
 
-const unsigned   LENGTH_OF_LONG_UUID = 16;
-typedef uint16_t ShortUUIDBytes_t;
-typedef uint8_t  LongUUIDBytes_t[LENGTH_OF_LONG_UUID];
+#define BLE_DEV_NAME "SunTracker"
+#define BLE_DEV_MAC 0xAA,0xBB,0xCC,0xDD,0xEE,0xFF
+#define BLE_ADVERTISING_INTERVAL 1000
 
 #include "CustomControlService.h"
 #include "CustomSensorsService.h"
 
 static BLE *p_BLEdev = NULL;
-
-#define BLE_DEV_NAME "SunTracker"
-#define BLE_DEV_MAC 0xAA,0xBB,0xCC,0xDD,0xEE,0xFF
-#define BLE_ADVERTISING_INTERVAL 1000
-
 static CustomControlService *p_customcontrolservice = NULL;
 static CustomSensorService  *p_customsensorservice = NULL;
 
@@ -103,6 +102,7 @@
 
 int16_t dir=0;          // Motor Rotation Direction: 0 = Stop, 1 = Anticlockwise, 2 = Clockwise
 int16_t changedir=0;    // Change Direction: 0 = No, 1 = Yes
+int16_t arrest=0;       // Arrest: 0 = No, 1 = Yes
 int16_t babybear=0;     // Difference (in Lux) between Left and Right
 int acc_data[3];        // Difference of Accelerometer
 int16_t diff=0;         // Abs of Babybear or Accelerometer difference
@@ -114,12 +114,200 @@
 int16_t Display=0;      // Shown on Display: 0 = Motor Speed, 1 = Solar Panel Value, 2 = Manual Control
 int16_t status, status_t, status_b, status_l, status_r; // Babybear Status
 
-/* ---------------------------------------------------------------------------*/  
+/* Initializations ------------------------------------------------------------*/
+
+// Initializing SPI bus
+DevSPI dev_spi(D11, D12, D13);
+
+// Initializing I2C bus
+DevI2C dev_i2c(D14, D15);
+
+// Initializing Motor Component IHM01A1
+static L6474 *motor;
+
+// Initializing Babybear Component 6180XA1
+static X_NUCLEO_6180XA1 *board;
+MeasureData_t data_sensor_top, data_sensor_bottom, data_sensor_left, data_sensor_right;
+    
+// Initializing MEMS Component IKS01A1
+static X_NUCLEO_IKS01A1 *mems;
+MotionSensor *accelerometer;
+
+InterruptIn mybutton(USER_BUTTON);
+
+//AnalogIn analog_read(A1); // A1 Conflict with BLE SPI_CS --> Changed it!!!
+
+/* User_Button_Pressed -------------------------------------------------------*/
+
+void User_Button_Pressed()
+{
+
+    if (start>0)    { Display++; }
+    if (Display>2)  { Display=0; }
+    if (start==0)   { start=1; }
+    
+    printf("PUSH Display %d\r\n", Display);
+
+}
+
+/* Initialization ------------------------------------------------------------*/
+
+bool Initialization(void)
+{
+  
+    // Initializing MEMS Component
+    mems=X_NUCLEO_IKS01A1::Instance(&dev_i2c);
+    accelerometer = mems->GetAccelerometer();
+   
+//----
+
+    // Initializing Babybear Component
+    //board=X_NUCLEO_6180XA1::Instance(&dev_i2c);
+    board=X_NUCLEO_6180XA1::Instance(&dev_i2c, NC, NC, NC, NC);
+
+    //status=board->InitBoard();
+    //if(status) VL6180x_ErrLog("Failed to init the board!\n\r");
+
+    // Put GPIO not used as Interrupt in Hi-Z
+    status_t=board->sensor_top->SetGPIOxFunctionality(1, GPIOx_SELECT_OFF);
+    //status_b=board->sensor_botton->SetGPIOxFunctionality(1, GPIOx_SELECT_OFF); No Present
+    status_l=board->sensor_left->SetGPIOxFunctionality(1, GPIOx_SELECT_OFF);
+    status_r=board->sensor_right->SetGPIOxFunctionality(1, GPIOx_SELECT_OFF);
+    
+    // Set Babybears
+    status_l=board->sensor_left->AlsSetAnalogueGain(3);
+    status_r=board->sensor_right->AlsSetAnalogueGain(3);
+    status_l=board->sensor_left->StartMeasurement(als_continuous_polling, NULL, NULL, NULL);
+    status_r=board->sensor_right->StartMeasurement(als_continuous_polling, NULL, NULL, NULL);
+
+//----
+
+    // Initializing Motor Component
+    motor = new L6474(D2, D8, D7, D9, D10, dev_spi); // D7 conflict with BNRG_RST (when motor change direction 0-1 reset BLE)
+    if (motor->Init(NULL) != COMPONENT_OK)
+        return false;
+
+    motor->SetStepMode(STEP_MODE_1_8);  // Default is STEP_MODE_1_16
+
+    // Set defaults Motor Speed
+    motor->SetAcceleration(SET_ACC);
+    motor->SetDeceleration(SET_DEC);
+    motor->SetMaxSpeed(SET_MAX);        // Variable by Light/Mems Sensors
+    motor->SetMinSpeed(SET_MIN);
+
+    return true;
+
+}
+
+/* Measure_Babybear ----------------------------------------------------------*/
+
+void Measure_Babybear(void)
+{
+
+    status_l=board->sensor_left->GetMeasurement(als_continuous_polling, &data_sensor_left);
+    status_r=board->sensor_right->GetMeasurement(als_continuous_polling, &data_sensor_right);
+
+    babybear = data_sensor_right.lux - data_sensor_left.lux;
+
+    diff = abs(babybear);
 
-//void DISP_ExecLoopBody(void) {};
+    if (babybear>0) { left=0; right=1; }
+    if (babybear<0) { left=1; right=0; }
+
+}
+
+/* Measure_Accelerometer -----------------------------------------------------*/
+
+void Measure_Accelerometer(void)
+{
+
+    accelerometer->Get_X_Axes(acc_data);
+
+    diff = abs(acc_data[0]);
+
+    if (acc_data[0]>0) { left=0; right=1; }
+    if (acc_data[0]<0) { left=1; right=0; }
+
+}
+
+/* Control_Motor -------------------------------------------------------------*/
+
+void Control_Motor(void)
+{
+
+    //printf("Diff: %d lux/mems\n\r", diff);
+    motor->SetMaxSpeed(diff);
+
+    if (diff>TOLLERANCE) {
+        if (diff <=RANGE_1)
+        {
+            if (left)  { strcpy(DisplayStr,"E___"); }
+            if (right) { strcpy(DisplayStr,"___3"); }
+        }
+        else if (diff >RANGE_1 & diff <=RANGE_2)
+        {
+            if (left)  { strcpy(DisplayStr,"E==="); }
+            if (right) { strcpy(DisplayStr,"===3"); }
+        }
+        else if (diff >RANGE_2)
+        {
+            if (left)  { strcpy(DisplayStr,"E~~~"); }
+            if (right) { strcpy(DisplayStr,"~~~3"); }
+        }
+
+        // In Case of Change Direction
+        if (left & dir==2)  { changedir=1; }
+        if (right & dir==1) { changedir=1; }
 
-//AnalogIn analog_read(A1); // A1 Conflict with BLE SPI_CS --> Changed in A????
+        // Run only if Stop or Change Direction
+        if (diff>TOLLERANCE & (dir==0 | changedir==1)) {
+            if (left)   { motor->Run(StepperMotor::FWD); dir=1; changedir=0; }
+            if (right)  { motor->Run(StepperMotor::BWD); dir=2; changedir=0; }
+            printf("RUN\n\r");
+        }
+    }
+
+    // Get Motor Position and Control Rotation Block
+    pos = motor->GetPosition();
+    if (pos>STOP | pos<-STOP) {
+        if (pos>0) { motor->GoTo(STOP); }
+        if (pos<0) { motor->GoTo(-STOP); }
+        printf("GOTO\n\r");
+    }
 
+    // Stop Motor
+    if (diff<=TOLLERANCE) { 
+        arrest=1; 
+        if (Display==0) { strcpy(DisplayStr,"----"); }
+        if (Display==2) { strcpy(DisplayStr,"E  3"); }
+    }
+        
+    if (arrest==1 && dir!=0 ) { // Stop just one time
+        motor->HardStop();
+        dir=0;
+        changedir=0;
+        arrest=0;
+        printf("STOP\n\r");
+    }
+
+}
+
+/* Measure_SolarPanel --------------------------------------------------------*/
+
+void Measure_SolarPanel(void)
+{
+    
+    // AnalogIn: 0V return 0.0 , 3.3V return 1.0
+    float measure = 0; //analog_read.read() * 3300;
+    //printf("Measure = %.0f mV\r\n", measure);
+    //board->display->DisplayDigit("A", 0);
+
+    if (Display==1) { sprintf(DisplayStr, "%.0f", measure); }
+
+    board->display->DisplayString(DisplayStr, 4);
+    //printf("%s\n\r", DisplayStr);
+    
+}
 
 /* Bluetooth CallBack ---------------------------------------------------------*/
 
@@ -140,7 +328,13 @@
 
 static void myonDataWriteCallback(const GattWriteCallbackParams *eventDataP)
 {
+    printf ("myonDataWriteCallback attr_handle: %x  att_data[3]: %x  data_length: %d\n\r", eventDataP->handle, eventDataP->data[3], eventDataP->len );
     
+    if (p_customcontrolservice->isContHandle(eventDataP->handle)) // Only if write come from this Service
+    {
+        uint8_t Command = eventDataP->data[3];  // Riceve 8 byte: data[0] + data[1] + data[2] + data[3]
+        printf("myonDataWriteCallback (Command %x)\r\n", Command);
+    }
 }
 
 static void onConnectionCallback(const Gap::ConnectionCallbackParams_t * connectionParams)
@@ -154,15 +348,11 @@
     p_BLEdev->gap().startAdvertising();
 }
 
-/* Main ----------------------------------------------------------------------*/
+/* Bluetooth Initialization ---------------------------------------------------*/
 
-int main()
+bool BLE_Initialization(void)
 {
 
-    // Printing to the console
-    printf("SunTracker by Fabio Brembilla\r\n\n");
-    
-    // BLE Initialization
     p_BLEdev = new BLE;
     if (!p_BLEdev) { printf("\r\nBLE Device creation failed\r\n"); }
     const Gap::Address_t BLE_address_BE = {BLE_DEV_MAC};        
@@ -170,91 +360,81 @@
     
     p_BLEdev->init();
 
-    // BLE CallBack Functions
+    // Set BLE CallBack Functions
     p_BLEdev->gattServer().onUpdatesEnabled(onUpdatesEnabledCallback);
     p_BLEdev->gattServer().onUpdatesDisabled(onUpdatesDisabledCallback);
     p_BLEdev->gattServer().onDataRead(onDataReadCallback);
     p_BLEdev->gattServer().onDataWritten(myonDataWriteCallback);
     p_BLEdev->gap().onConnection(onConnectionCallback);
     p_BLEdev->gap().onDisconnection(onDisconnectionCallback);
+    //p_BLEdev->gattServer().onConfirmationReceived(onConfirmationReceivedCallback);    
+    //p_BLEdev->gattServer().onDataSent(onDataSentCallback);    
+    //p_BLEdev->gap().onTimeout(onTimeoutCallback);
 
     // BLE Services
     p_customcontrolservice =  new CustomControlService(*p_BLEdev);   
     p_customsensorservice = new CustomSensorService(*p_BLEdev);
 
-    // BLE Advertising
+    // Setup BLE Advertising
     const static char DEVICE_NAME[] = BLE_DEV_NAME;
     p_BLEdev->gap().accumulateAdvertisingPayload(GapAdvertisingData::BREDR_NOT_SUPPORTED | GapAdvertisingData::LE_GENERAL_DISCOVERABLE);
-    uint8_t dat[] = {0x01,0x80,0x00,0xFC,0x00,0x00};  
+    uint8_t dat[] = {0x01,0x80,0x00,0xFC,0x00,0x00};    
     p_BLEdev->gap().accumulateScanResponse(GapAdvertisingData::MANUFACTURER_SPECIFIC_DATA,dat,6);    
     p_BLEdev->gap().accumulateAdvertisingPayload(GapAdvertisingData::UNKNOWN);
     p_BLEdev->gap().accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LOCAL_NAME, (uint8_t *)DEVICE_NAME, sizeof(DEVICE_NAME));
     p_BLEdev->gap().setAdvertisingType(GapAdvertisingParams::ADV_CONNECTABLE_UNDIRECTED);
     p_BLEdev->gap().setAdvertisingInterval(BLE_ADVERTISING_INTERVAL);
     p_BLEdev->gap().startAdvertising();
-      
-    printf("BLE_Initialization OK (Line %d)\r\n", __LINE__);
 
-    // Initializing SPI bus
-    DevSPI dev_spi(D11, D12, D13);
-    
-    // Initializing I2C bus
-    DevI2C dev_i2c(D14, D15);  
-    
-    // Initializing Babybear Component 6180XA1
-    static X_NUCLEO_6180XA1 *board;
-    MeasureData_t data_sensor_left, data_sensor_right;
+    return true;
     
-    // Initializing Babybear Component
-    //board=X_NUCLEO_6180XA1::Instance(&dev_i2c); // Con questo comando non si blocca quando Connetto il BLE, ma comunque non fuonziona
-    board=X_NUCLEO_6180XA1::Instance(&dev_i2c, NC, NC, NC, NC);
-    //status=board->InitBoard();
-    if(status) VL6180x_ErrLog("Failed to init the board!\n\r");
+}
+
+/* Main ----------------------------------------------------------------------*/
+
+int main()
+{
+
+    // Printing to the console
+    printf("SunTracker by Fabio Brembilla\r\n\n");
 
-    // Put GPIO not used as Interrupt in Hi-Z
-    status_t=board->sensor_top->SetGPIOxFunctionality(1, GPIOx_SELECT_OFF);
-    //status_b=board->sensor_botton->SetGPIOxFunctionality(1, GPIOx_SELECT_OFF); No Present
-    status_l=board->sensor_left->SetGPIOxFunctionality(1, GPIOx_SELECT_OFF);
-    status_r=board->sensor_right->SetGPIOxFunctionality(1, GPIOx_SELECT_OFF);
+    Initialization();
+    printf("Initialization OK (Line %d)\r\n", __LINE__);    
     
-    // Set Babybears
-    status_l=board->sensor_left->AlsSetAnalogueGain(3);
-    status_r=board->sensor_right->AlsSetAnalogueGain(3);
-    status_l=board->sensor_left->StartMeasurement(als_continuous_polling, NULL, NULL, NULL);
-    status_r=board->sensor_right->StartMeasurement(als_continuous_polling, NULL, NULL, NULL);
+    BLE_Initialization();
+    printf("BLE_Initialization OK (Line %d)\r\n", __LINE__);  
+        
+    mybutton.fall(&User_Button_Pressed);
+    printf("Wait Push Button\r\n");
 
-    printf("Initialization OK (Line %d)\r\n", __LINE__);
+    // Loop until push User Button to Set 0 Point
+    strcpy(DisplayStr,"pusH");
+    while(start<1) {
+        board->display->DisplayString(DisplayStr, 4);
+        p_BLEdev->waitForEvent();
+        //printf("%s\n\r", DisplayStr);
+    }
 
     printf("Start Main Loop\r\n");
 
     static int INTLOOP=0;
 
     // Main Loop
-    while(true) {
-        
-        status_l=board->sensor_left->GetMeasurement(als_continuous_polling, &data_sensor_left);
-        status_r=board->sensor_right->GetMeasurement(als_continuous_polling, &data_sensor_right);
-    
-        babybear = data_sensor_right.lux - data_sensor_left.lux;
-    
-        diff = abs(babybear);
+    while(true)
+    {
+        if (Display==0 | Display==1)    { Measure_Babybear(); }
+        if (Display==2)                 { Measure_Accelerometer(); }
+
+        Control_Motor();
+        Measure_SolarPanel();
         
         INTLOOP++;
-        if (INTLOOP==100) { p_customsensorservice->sendEnvPosition(rand(),0); INTLOOP=0; }
-          
-        //printf("babybear %d\r\n", diff);
+        if (INTLOOP==100) { p_customsensorservice->sendEnvPosition(rand(),0); printf("Read BLE\n\r"); INTLOOP=0; }
         
-        sprintf(DisplayStr, "%d", diff);
-        board->display->DisplayString(DisplayStr, 4);
-            
-        //strcpy(DisplayStr,"pusH");
-        //board->display->DisplayString(DisplayStr, 4);
-            
         p_BLEdev->waitForEvent();
-        }
-}
+    }
 
-// Configuro prima BLE e poi Babybear funziona, ma quando mi collego con il BLE l'app va in crash con il commento.
-// “mbed assertation failed: (hz > 0) && (hz <= 400000), file: C:\Code\git_repo\github\mbed-official\libraries\mbed\targets\hal\TARGET_STM\TARGET_STM32F4\i2c_api.c, line 119”
+    //status_l=board->sensor_left->StopMeasurement(als_continuous_polling);
+    //status_r=board->sensor_right->StopMeasurement(als_continuous_polling);
 
-// Configuro prima Babybear e poi BLE non funziona.
+}