servo_switch_DMPA6

Code, dependencies, procedure and design for automated on/off switch for DMP A6

Intro

Every time we want to stream music from the Raspberry Pi to the DMP A6, at boot (of the RPi), the DMP A6 will be turned on tanks to a servo motor.

Resource

code & circuit

system d service

Circuit

Code

find code here

from gpiozero import AngularServo
from time import sleep

servo = AngularServo(15, min_pulse_width=0.0006, max_pulse_width=0.0023)

servo.angle = 0
sleep(2)
servo.angle = 70
sleep(2)
servo.angle = 0
sleep(2)

Dependencies

ssh in rpi

sudo apt install python3-gpiozero
sudo apt install python3-rpi.gpio python3-pigpio python3-lgpio
sudo usermod -aG gpio $USER

ls -l /dev/gpiomem

crw------- 1 root root 239, 0 May 17 10:48 /dev/gpiomem

sudo chown root:gpio /dev/gpiomem

ls -l /dev/gpiomem

crw------- 1 root gpio 239, 0 May 17 10:48 /dev/gpiome

sudo python3 servo.py

Run at boot

1. Create a design to keep the servo in place, so it will be able to use his torque all against turn on button (the stl file of the design can be found here).

   

2. Once the code run, the servo is in pace and we see that the have enough torque to press the button, we have to run the code at boot

3. Every time we turn on the RPi, thanks to "System d Services" we execute the code to turn on the DMP A6.

4. comming soon