NO SUPPORT WILL BE PROVIDED

Display text on LED Matrix using ESP32 and LED control board over USB.

Dev Environment

PlatformIO

Hardware

• ESP32 (esp32doit-devkit-v1 or firebeetle32)
• https://www.electrodragon.com/product/rgb-matrix-panel-drive-board-raspberry-pi/
• 3 Panels of 64x32 Outdoor LED Matrix (Chip 2153)

Command List

type	function	parameter	example
CL	clear	None	CL
BR	brightness	0~100	BR:60
FT	font type	font type	FT:FreeMono9pt7b
SZ	font size	size	SZ:2
BG	background clor	red,green,blue	BG:255,0,0
TC	text color	red,green,blue	TC:0,0,255
CR	cursor	x,y	CR:10,20
GR	grid		GR
PT	print a string(left)		PT:Hello World
PC	print a string(horizontal center)		PC:Hello\World
SC	print a string(screen center)		SC:Hello\World
IM	display image	image name	IM:happy.bmp, IM:sad.bmp
CI	fill circle	x,y,radius,r,g,b	CI:x,y,radius,r,g,b
RT	fill rectangle	x,y,w,h,r,g,b	CI:x,y,width,height,r,g,b
FL	flush all command		FL
HP	string information	string	HP:46 or HP:SLOW
DL	delay time	in ms	DL:2000
FS	flash 4 rectangles	times,delay	FS:5,300 (5times, 300ms)
RS	restart system		RS

Fonts

Available fonts are as follows:

• default (monospace)
• HWYGOTH14pt7b (highway gothic 14)
• HWYGOTH16pt7b (highway gothic 16)
• HWYGOTH18pt7b (highway gothic 18)
• HWYGNRRW14pt7b (highway gothic narrow 14)
• HWYGNRRW16pt7b (highway gothic narrow 16)
• HWYGNRRW18pt7b (highway gothic narrow 18)
• HWYGNRRW42pt7b (highway gothic narrow 42)

Highway Gothic: https://www.dafont.com/highway-gothic.font

Convert font file using fontconvert

fontconvert HWYGNRRW.TTF 12 > HWYGNRRW12pt7b.h

Build fontconvert

https://github.com/PhantomRay/stm-led-esp32/wiki/fontconvert

Misc

Get the width and height of a string

command - FT:FreeSerif12pt7b;HP:Hello
result - x=?,y=?,x1=?,y1=?,w=?,h=? (w: width, h:height)

Code Formatting

Instasll clang-format v15.

clang-format -i src/*.* -style=file:.clang-format

For pre-commit, use the following:

clang-format -i src/*.* -style=file:.clang-format -n -Werror