ESP-Cherry

Little board that connects 4 Cherry Switches and 4 LEDs to a Wemos D1 Mini Board

Folder Structure:

• ESP-Cerry: KiCad Project of the Board
• gehaeuse: OpenSCAD Project for a 3D printed casing

Parts

• U1: Wemos D1 Mini
• Switches SW1, SW2, SW3, SW4: CHERRY MX-Switches, choose to your liking
• Resistors R1, R2: Pull-Up-Resistors for SW3 and SW4, 1kΩ - 100kΩ should be fine
• LEDs D1, D2, D3, D4: LEDs to iluminate the Keykaps, choose to your liking. Use LEDs which fit your switches. The switches I used fit 3mm LED's but some do not
• Resistors R3, R4, R5, R6: protective resistors for LEDs D1, D2, D3, D4: choose whatever fits your LEDs to be powered from 3.3V.

Optional Parts:

• Add R7 = 4.7kΩ and U2 = DS18B20 for temperature mesurement

Other

• Power the Wemos D1 via USB, it powers the rest of the board (or solder 3.3V or 5V directly to the Wemos)
• Mounting Holes fit M3 screws
• Mounting Holes Positions in mm from the lower left corner of the board:
  • 5.08, 20.32
  • 5.08, 40.64
  • 5.08, 58.42
  • 5.08, 78.74
  • 52.07, 7.62
  • 52.07, 78.74

Software

• Use whatever can control IO pins
• I use Tasmota-Firmware with the following IO-settings:
  • Modul type: 18 Generic
  • D3 GPIO0: 15 Switch7
  • D4 GPIO2: 16 Switch8
  • D2 GPIO4: 14 Switch6
  • D1 GPIO5: 13 Switch5
  • D6 GPIO12: 22 Relay2
  • D7 GPIO13: 21 Relay1
  • D5 GPIO14: 23 Relay3
  • D0 GPIO16: 24 Relay4
  • otherwise: 00 None