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: main.cpp
- Revision:
- 4:1d3d071a4c2c
- Parent:
- 2:013921c26f43
- Child:
- 5:76fb6b783487
--- a/main.cpp Fri Jan 22 14:28:13 2016 +0000 +++ b/main.cpp Tue Jan 26 13:29:53 2016 +0000 @@ -2,14 +2,14 @@ ****************************************************************************** * @file main.cpp * @author Fabio Brembilla - * @version V1.0.0 - * @date December 1st, 2015 + * @version V2.0.0 + * @date January 22th, 2016 * @brief SunTracker + RemoteControl Vertical Application * This application use IHM01A1, 6180XA1, IKS01A1, IDB0XA1 expansion boards ****************************************************************************** * @attention - * - * <h2><center>© COPYRIGHT(c) 2015 STMicroelectronics</center></h2> + * + * <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: @@ -35,12 +35,12 @@ * ****************************************************************************** */ - + /* Includes ------------------------------------------------------------------*/ - + /* mbed specific header files. */ #include "mbed.h" - + /* Helper header files. */ #include "DevSPI.h" #include "DevI2C.h" @@ -56,6 +56,12 @@ #include <stdio.h> #include <assert.h> +/* Calibration files. */ +#include "MotionFX_Manager.h" // Need for osxMFX_calibFactor + +/* BlueTooth Custom Service files. */ +#include "CustomSunTrackerService.h" + /* Definitions ---------------------------------------------------------------*/ #define SET_ACC 400 // Set Motor Acceleration @@ -100,29 +106,35 @@ /* Instance mems IKS01A1. */ static X_NUCLEO_IKS01A1 *mems=X_NUCLEO_IKS01A1::Instance(&dev_i2c); MotionSensor *accelerometer = mems->GetAccelerometer(); - -void DISP_ExecLoopBody(void){}; + +void DISP_ExecLoopBody(void) {}; AnalogIn analog_read_A1(A1); -InterruptIn mybutton(USER_BUTTON); +InterruptIn mybutton(USER_BUTTON); /* User_Button_Pressed -------------------------------------------------------*/ void User_Button_Pressed() { - - if (start>0) { Display++; } - if (Display>2) { Display=0; } - if (start==0) { start=1; } - + + if (start>0) { + Display++; + } + if (Display>2) { + Display=0; + } + if (start==0) { + start=1; + } + } /* Initialization ------------------------------------------------------------*/ bool Initialization(void) { - + /* Initializing Babybear Component. */ status=board->InitBoard(); if(status) @@ -131,24 +143,24 @@ // 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_l=board->sensor_left->SetGPIOxFunctionality(1, GPIOx_SELECT_OFF); status_r=board->sensor_right->SetGPIOxFunctionality(1, GPIOx_SELECT_OFF); - + /* Initializing Motor Control Component. */ motor = new L6474(D2, D8, D7, D9, D10, dev_spi); 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 ----------------------------------------------------------*/ @@ -163,9 +175,15 @@ diff = abs(babybear); - if (babybear>0) { left=0; right=1; } - if (babybear<0) { left=1; right=0; } - + if (babybear>0) { + left=0; + right=1; + } + if (babybear<0) { + left=1; + right=0; + } + } /* Measure_Accelerometer -----------------------------------------------------*/ @@ -177,62 +195,97 @@ diff = abs(acc_data[0]); - if (acc_data[0]>0) { left=0; right=1; } - if (acc_data[0]<0) { left=1; right=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) - { + //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"); } - } - + 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; } - + if (left & dir==2) { + changedir=1; + } + if (right & dir==1) { + changedir=1; + } + // 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; } - } + if (left) { + motor->Run(StepperMotor::FWD); + dir=1; + changedir=0; + } + if (right) { + motor->Run(StepperMotor::BWD); + dir=2; + changedir=0; + } + } } - + // 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); } + if (pos>0) { + motor->GoTo(STOP); + } + if (pos<0) { + motor->GoTo(-STOP); + } } - + // Stop Motor - if (diff<=TOLLERANCE) { + if (diff<=TOLLERANCE) { motor->HardStop(); - if (Display==0) { strcpy(DisplayStr,"----"); } - if (Display==2) { strcpy(DisplayStr,"E 3"); } + if (Display==0) { + strcpy(DisplayStr,"----"); + } + if (Display==2) { + strcpy(DisplayStr,"E 3"); + } dir=0; changedir=0; } - + } /* Measure_SolarPanel --------------------------------------------------------*/ @@ -245,48 +298,52 @@ //printf("Measure = %.0f mV\r\n", measure); //board->display->DisplayDigit("A", 0); - if (Display==1) { sprintf(DisplayStr, "%.0f", measure); } - - board->display->DisplayString(DisplayStr, 4); + if (Display==1) { + sprintf(DisplayStr, "%.0f", measure); + } + + board->display->DisplayString(DisplayStr, 4); } /* Main ----------------------------------------------------------------------*/ int main() -{ - - Initialization(); - +{ + + Initialization(); + mybutton.fall(&User_Button_Pressed); - + /* Printing to the console. */ printf("SunTracker by Fabio Brembilla\r\n\n"); - + /* 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); - + /* Loop until push User Button to Set 0 Point. */ strcpy(DisplayStr,"pusH"); - while(start<1) - { + while(start<1) { board->display->DisplayString(DisplayStr, 4); } - + /* Main Loop. */ - while(true) - { - if (Display==0 | Display==1) { Measure_Babybear(); } - if (Display==2) { Measure_Accelerometer(); } - + while(true) { + if (Display==0 | Display==1) { + Measure_Babybear(); + } + if (Display==2) { + Measure_Accelerometer(); + } + Control_Motor(); Measure_SolarPanel(); } - + status_l=board->sensor_left->StopMeasurement(als_continuous_polling); status_r=board->sensor_right->StopMeasurement(als_continuous_polling); - + }