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Human interaction Extended

Table of Contents

Prolog

As with the previous tutorials, here are a few more examples that should help you to solve any questions and problems you may have.

Move crosshair via joystick (sh1106)

The goal of this tutorial is to use a joystick to move a crosshair on a screen. The respective XY position and the status of the button should also be displayed.

Requirements

  • mandatory SPI OLED display (SH1106 Waveshare)
  • mandatory 1x joystick
  • few cables
  • optional breadboard

Pinout table

Here you can see the respective wiring for the circuit.

Device Device Pin ESP Pin
OLED VCC 3V3
OLED GND GND
OLED NC -
OLED DIN 23
OLED CLK 18
OLED CS 2
OLED DC 5
OLED RES 4
Joystick +5V 3V3
Joystick GND GND
Joystick X 32
Joystick Y 33
Joystick BUT 35

Code

Actually the code is very simple. Correct wiring without creating a short circuit is a bit more difficult in this example.

Source Code for example joystick_display

Source Code for module sh1106.py

Check your circuit and copy all files to the microcontroller.

# connect via rshel
(venv) $ rshell -p [SERIAL-PORT]

# copy all files to esp32
/your/current/path> cp lib/sh1106.py /pyboard/lib/
/your/current/path> cp examples/user_input/joystick_display.py /pyboard/main.py

# start repl
/your/current/path> repl

Start with keys Control + d or press reset key. To stop the loop press keys Control+ c, to leave the REPL, press keys Control + x.

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