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

CustomControlService.h

Committer:
fabiombed
Date:
2016-02-08
Revision:
6:4cbf7303b496
Parent:
5:76fb6b783487
Child:
7:54984d031243

File content as of revision 6:4cbf7303b496:

/******************************************************************************
  * @file    CustomControlService.h
  * @author  Fabio Brembilla
  * @version V1.0.0
  * @date    January, 2016
  * @brief   SunTracker Custom Service for BlueTooth (IDB0XA1 expansion board)
  *****************************************************************************
  * @attention
  *
  * <h2><center>&copy; COPYRIGHT(c) 2016 STMicroelectronics</center></h2>
  *
  * Redistribution and use in source and binary forms, with or without modification,
  * are permitted provided that the following conditions are met:
  *   1. Redistributions of source code must retain the above copyright notice,
  *      this list of conditions and the following disclaimer.
  *   2. Redistributions in binary form must reproduce the above copyright notice,
  *      this list of conditions and the following disclaimer in the documentation
  *      and/or other materials provided with the distribution.
  *   3. Neither the name of STMicroelectronics nor the names of its contributors
  *      may be used to endorse or promote products derived from this software
  *      without specific prior written permission.
  *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *
  ******************************************************************************
*/

#ifndef __CUSTOM_BLE_CONTROL_SERVICE_H__
#define __CUSTOM_BLE_CONTROL_SERVICE_H__
#include "BLE.h"
#include "UUID.h"
                              
#define STORE_BE_32(buf, val)    ( ((buf)[3] =  (uint8_t) (val)     ) , \
                                   ((buf)[2] =  (uint8_t) (val>>8)  ) , \
                                   ((buf)[1] =  (uint8_t) (val>>16) ) , \
                                   ((buf)[0] =  (uint8_t) (val>>24) ) )                         
                            
#define SIZEOF_CONTROL_DATA_LEN  2+4+1+1

/* BLE Services: Primary + 1 Secondary (Char Desk) */
const LongUUIDBytes_t CONTROL_SERVICE_UUID_128 = {0x00,0x00,0x00,0x00,0x0A,0x0A,0x0A,0x0A,0x0A,0x0A,0x0A,0x0A,0x0A,0x0A,0x0A,0x0A}; //Primary
const LongUUIDBytes_t USER_BUTTON_CHAR_UUID    = {0x00,0x00,0x00,0x01,0x0A,0x0A,0x0A,0x0A,0x0A,0x0A,0x0A,0x0A,0x0A,0x0A,0x0A,0x0A}; //User Button Control

/* Custom Config Service */
class CustomConfigService  {
public:
    CustomConfigService(BLE &_ble) :
        ble(_ble),
                userbuttonCharacteristic(USER_BUTTON_CHAR_UUID, controlData, SIZEOF_CONTROL_DATA_LEN, SIZEOF_CONTROL_DATA_LEN,
                                         GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_READ | GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_WRITE)
        {  
        static bool serviceAdded = false; // To be sure to define just one time
        if (serviceAdded) {
            return;
        }

        GattCharacteristic *charTable[] = {&userbuttonCharacteristic};

        GattService   configService(CONTROL_SERVICE_UUID_128, charTable, sizeof(charTable) / sizeof(GattCharacteristic *));              
                
        ble.gattServer().addService(configService);                              
                
        isEnabledControlNotify = false;
        memset (controlData, 0, SIZEOF_CONTROL_DATA_LEN); 
        serviceAdded = true;
    }

// Tests Method
//----------------INIZIO  
/*
  
    uint32_t sendcontrolState(uint32_t Feature, uint8_t Command, uint8_t val, uint16_t TimeStamp) {      
            STORE_LE_16(controlData ,TimeStamp); 
            STORE_BE_32(controlData+2,Feature);          
            controlData[6] = Command;
            controlData[7] = (val==0x01) ? 100: val;                     
            return ble.gattServer().write(userbuttonCharacteristic.getValueAttribute().getHandle(), controlData, SIZEOF_CONTROL_DATA_LEN, 0);
    }
    
    uint32_t updatecontrolState(uint32_t Feature, uint8_t Command, uint8_t val, uint16_t TimeStamp) {
            if (ble.getGapState().connected && isEnabledControlNotify ) {  
            return sendcontrolState(Feature, Command, val, TimeStamp);
            }
            return 0;
    }

    void updateConnectionStatus(ConnectionStatus_t status) {            
            isEnabledControlNotify = false;
            memset (controlData, 0, SIZEOF_CONTROL_DATA_LEN);             
            }   
    
    bool isConfHandle (Gap::Handle_t handle) {
            if (handle == userbuttonCharacteristic.getValueAttribute().getHandle()) return true;
            return false;
    }           

    void enNotify (Gap::Handle_t handle) {
            if (isConfHandle(handle)) { 
                PRINTF("enNotify! %d\n\r", handle); isEnabledControlNotify = true; return; }    
    }
    
    void disNotify (Gap::Handle_t handle) {
            if (isConfHandle(handle)) { 
                            isEnabledControlNotify = false; return; }    
    }   

*/    
//----------------FINE  

// Variables Initialization
private:
        BLE                              &ble;
        uint8_t                          controlData[SIZEOF_CONTROL_DATA_LEN];                
        uint8_t                          controlState;
        GattCharacteristic               userbuttonCharacteristic;  
        bool                             isEnabledControlNotify;

};

#endif /* #ifndef __CUSTOM_BLE_CONTROL_SERVICE_H__*/