MIIXER

An open-hardware midi controller with esp32-c3, 4 linear faders, 8 keyswitches.

Note

This is a work in progress.

Technical Specs

• Processor: esp32-s3
• Inputs
  • 4 linear potentiometers 600mm
  • 8 Cherry MX Switches
• ICs
  • PCF8574T - I2C IO Expander
  • ADS1115IDGS - I2C ADC Expander
  • AP2127K-3.3 - 5v to 3.3v LDO
  • USBLC6-2SC6 - ESD Protection
• Connectivity:
  • USB-C (Power, Data & Flash)
  • Wifi & BLE

Photos

See the docs folder for the rendered schematics, PCBs, and 3D renders.

ESPHome Compatability

Due to the fact that this devices uses common off-the-shelf I2C ICs and is esp32-c3 based, you can easily use it with ESPHome.

# TODO: This yaml file is work in progress, its ment to give an impression, its has not been confirmed functional.
i2c:
  sda: GPIO8
  scl: GPIO9
  scan: true

# 4x Fader Input
ads1115:
  address: 0x48 # todo confirm
  update_interval: 5s
  # todo interrupt pin (io6)

# 4x Fader LEDs
tcl59208f:
  id: led_drv # optional
  address: # todo

# 8x Keyswitch Input
pcf8574:
  id: expander # optional
  address: 0x20 # todo confirm
  # todo interrupt pin (io7)

binary_sensor:
  # 8x Keyswitch Input
  - platform: pcf8574
    pin: P0
    name: "Switch 1"
    # todo add 7 more pins

sensor:
  # 4x Fader Analog Input
  - platform: ads1115
    multiplexer: 'A0_GND' # todo
    gain: 6.144 # todo
    # todo 3 more pins

output:
  # 4x Fader LEDs
  - platform: tcl59208f
    driver: led_drv # optional
    id: led1
    channel: 0
  - platform: tcl59208f
    driver: led_drv # optional
    id: led2
    channel: 1
  - platform: tcl59208f
    driver: led_drv # optional
    id: led3
    channel: 2
  - platform: tcl59208f
    driver: led_drv # optional
    id: led4
    channel: 3

light:
  # 4x Fader SK6812
  - platform: fastled_clockless
    chipset: SK6812
    pin: GPIO3
    num_leds: 4
    rgb_order: GRB
    name: "SK6812 Array"