
SunTracker_BLE
Dependencies: BLE_API X_NUCLEO_6180XA1 X_NUCLEO_IDB0XA1 X_NUCLEO_IHM01A1 X_NUCLEO_IKS01A1 mbed
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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.
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 structureis 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 efficiencywith 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
- Nucleo-F401RE platform using a STM32F401RET6 microcontroller.
- X-NUCLEO-IHM01A1 - Stepper motor driver board based on the EasySPIN L6474.
- X-NUCLEO-6180XA1 - 3-in-1 proximity and ambient light sensor board based on ST FlightSense technology.
- VL6180X-SATEL - Satellite boards compatible with X-NUCLEO-6180XA1 board.
- X-NUCLEO-IKS01A1 - Motion MEMS and environmental sensor board.
- X-NUCLEO-IDB04A1 or X-NUCLEO-IDB05A1 - Bluetooth Low Energy Bluetooth low energy evaluation board.
- 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
- Nucleo-F401RE platform using a STM32F401RET6 microcontroller.
- X-NUCLEO-IKS01A1 - Motion MEMS and environmental sensor board.
- X-NUCLEO-IDB04A1 or X-NUCLEO-IDB05A1- Bluetooth Low Energy Bluetooth low energy evaluation board.
MECHANICAL STRUCTURE
Find here the STL files to print with a 3D printer.
FLAT CABLE ASSEMBLY
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
Diff: CustomControlService_copy.h
- Revision:
- 14:644f9e7278e9
- Parent:
- 13:7880b45ceeac
- Child:
- 15:019b8d60c89d
--- a/CustomControlService_copy.h Fri Mar 11 09:53:49 2016 +0000 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,129 +0,0 @@ -/****************************************************************************** - * @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>© 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 Control Service */ -class CustomControlService { -public: - CustomControlService(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 | GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_NOTIFY) - { - static bool serviceAdded = false; // To be sure to define just one time - if (serviceAdded) { - return; - } - - GattCharacteristic *charTable[] = {&userbuttonCharacteristic}; - - GattService controlService(CONTROL_SERVICE_UUID_128, charTable, sizeof(charTable) / sizeof(GattCharacteristic *)); - - ble.gattServer().addService(controlService); - - isEnabledControlNotify = false; - memset (controlData, 0, SIZEOF_CONTROL_DATA_LEN); - serviceAdded = true; - } - -// Tests Method - - void enNotify (Gap::Handle_t handle) { - if (isContHandle(handle)) { - PRINTF("enNotify! %d\n\r", handle); isEnabledControlNotify = true; return; } - } - - void disNotify (Gap::Handle_t handle) { - if (isContHandle(handle)) { - isEnabledControlNotify = false; return; } - } - - bool isContHandle (Gap::Handle_t handle) { - if (handle == userbuttonCharacteristic.getValueAttribute().getHandle()) return true; - return false; - } - - void updateConnectionStatus(ConnectionStatus_t status) { - isEnabledControlNotify = false; - memset (controlData, 0, SIZEOF_CONTROL_DATA_LEN); - } - -/* - - 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; - } - -*/ - -// 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__*/ -