The code for the project Bluetooth Controlled Servo Motor using Arduino is given below. A closer view of the steering system with the servo and limit switches. To download this app, visit this link: “ Servo Motor Kontrol”. The motor controller receives a PWM signal from the ESP32 and controls the motor speed. The layout of the app after connecting it to the Bluetooth Module is shown below.Īs you can see, the app provides two ways in which you can control the servo motor: using dedicated buttons or using the slider. I have used an App called “Servo Motor Kontrol” developed by “YSRGGS”. Since the job of Bluetooth Module is to transfer data received from Phone and transmit it to Arduino, I have used only its TX Pin.įor more information on HC-05 Bluetooth Module and how to interface it with Arduino, please refer “ Arduino HC-05 Bluetooth Module”. So, connect the TX of the Bluetooth Module to RX (Pin 2) of Arduino. I will be using a Software Serial option of Arduino and hence Pins 2 and 3 of Arduino are fixed as RX and TX. It is important that you connect the control pin to a PWM enabled pin of Arduino. Connect the Control Pin of the Servo Motor to Pin 11 of Arduino. The Bluetooth module attached to the Breadboard.The Bluetooth VCC connect to the Arduino 3.3V.The Bluetooth GND connect to the Arduino GND.The Bluetooth TX connect to the Arduino Digital Pin 10.The Bluetooth RX connect to the Arduino Digital Pin 11.The design of the circuit for controlling a Servo Motor using Arduino and Bluetooth is very easy. The Servo1 VCC and GND connect to the breadboard’s VCC / GND inputs.The Servo1 Signal connects to the Arduino Digital PWM 3.The Servo2 VCC and GND connect to the breadboard’s VCC / GND inputs.The Servo2 Signal connects to the Arduino Digital PWM 5.The Servo3 VCC and GND connect to the breadboard’s VCC / GND inputs.The Servo3 Signal connects to the Arduino Digital PWM 6.The Servo4 VCC and GND connect to the breadboard’s VCC / GND inputs.The Servo4 Signal connects to the Arduino Digital PWM 9. Orange Input – Signal InputRed Input – Power Input (VCC)Brown Input – Ground Input(GND) The servo connections we use in this project are as follows: (click here to download the application) (p.s. Connect the Arduino GND to breadboard GND. The android application - This application will be sending various data packets to our HC-05 Bluetooth module. The external battery VCC / GND connect to the breadboard. If you don’t know how to operate a servo motor with Arduino then check it here. We use Servo motors to control the movement of the robotic arm. There are many variants of Arduino available in the market but we use Arduino UNO for this project. Note: Make sure that you circuit connections are exactly the same as in the above schematics. Arduino is a microcontroller whose functioning is controlled by ATmega 328p IC. The PWM sent to the motor determines the position of the shaft, and based on the duration of the pulse sent via the control wire the rotor will turn to the desired position. As soon as the button is pressed, the code will sync up both the servo motors at the same angle. In this example, the Arduino will drive one servo motor until the button is pressed. One servo motor is connected to pin number 7 and the second one is connected to pin number 6 of the Arduino. The motor’s neutral position is defined as the position where the servo has the same amount of potential rotation in both the clockwise or counter-clockwise direction. In this example, the Arduino drives two servo motors. A servo motor can usually only turn 90 degrees in either direction for a total of 180-degree movement. There is a minimum pulse, a maximum pulse, and a repetition rate. Servos are controlled by sending an electrical pulse of variable width or pulse width modulation (PWM), through the control wire. They are also used in radio controlled cars, puppets, and of course, robots. In practice, servos are used in radio controlled aeroplanes to position control surfaces like the elevators and rudders. As the coded signal changes, the angular position of the shaft changes. As long as the coded signal exists on the input line, the servo will maintain the angular position of the shaft. This shaft can be positioned to specific angular positions by sending the servo a coded signal. If you have any question or suggestion, please feel free to comment in my youtube video and please don’t forget to like and subscribe to my YouTube 2 channel.Ĭlick here 1 for the full tutorial and source code.Ī Servo is a small device that has an output shaft. 16-way steering gear control, Bluetooth Wireless and USB connection Two-way power supply for the control board and steering gear, arduino, robots, raspberry pi. In this video, I will show you how to control servo motors via an Android app and Bluetooth.It’s so easy to make and hope it will be useful for you guys.
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