raspberry pi 180° servo control using pca9685
Requires you to have the adafruit servokit library installed
You also need to configure i2c on your raspberry pi
Run main.py and type the number of the pin that the servo you wish to control is connected to eg. 0
Once you have done that it will reply with choose angle. Type the appropriate angle and hit enter, the selected servo should move to the specified angle.
EMG (Electromyography) is used to measure the muscles response to electrical signals. In this project the EMG signals are used to control a robotic arm.
The setup used here is an Arduino Uno, RPi, two myoware EMG sensors and a PCA9685 along with six servos labeled 0 - 5.
3.3v - vcc
GPIO 2 (SDA) - SDA
GPIO 3 (SCL) - SCL
GND - GND
To connect Arduino UNO and myoware sensors please refer to this manual
(To avoid risk of electric shock please use an isolated circuit)
Upload the measurements.ino file to the Arduino and connect the myoware sensors to pins A0 and A1.
Once that is complete activate the RPi and install the files from this repository.
Open the terminal on the RPi and type ls /dev/tty*, then plug the Arduino Uno to the RPi using a USB cable and repeat the command. Find the device that should now have appeared and remember it!
Open serial_comm.py and replace /dev/ttyUSB0 with the name you got.
Run serial_comm.py and check if any errors occur.
(if you encounter any errors or need a more detailed guide please refer to this tutorial)
If no errors occur then you can open main.py and run it, then type calibrate and follow the instructions that appear.
calibrate - calibrates software so that you get better control (NOTE: This command has to be typed in first for other EMG commands to work)
emg on - Activates EMG sensing for robotic arm
emg off - Deactivates EMG sensing for robotic arm