midilord

MIDI controller pedal built on ESP32-S3.

Hardware

• 8 footswitches
• 4×40 character LCD (ST7066U, 4-bit parallel)
• 1 MIDI IN, multiple MIDI OUTs
• USB MIDI (native ESP32-S3 USB OTG port)
• 9V pedal power, regulated to 5V and 3.3V logic

LCD pinout (XNY4004A, 18-pin)

Pin	Function
1	DB0
2	DB1
3	DB2
4	DB3
5	DB4
6	DB5
7	DB6
8	DB7
9	E1
10	R/W
11	RS
12	Vo (contrast)
13	VSS (GND)
14	VDD (+5V)
15	E2
16	NC
17	Backlight +
18	Backlight -

Planned features

• Morningstar-inspired function set
• Presets and banks (16 banks × 8 presets)
• Tap tempo
• Web server for preset and config editing

LCD Datasheet APA106

x0123456789012345678901234567890123456789
0 [Preset]  [Preset]  [Preset]  [Preset]
1
2
3 [Preset]  [Preset]  [Preset]  [Preset]