zebra-proxy

ssh proxy that shows lpn codes on an oled screen

parts

• raspberry pi 4b or raspberry pi zero 2 w
• 2.42" spi oled (SSD1309 128x64)
• 4x4 matrix keypad (optional)
• dupont jumper wires

wiring (spi)

oled	pi	gpio
gnd	pin 6	ground
vcc	pin 1	3.3v
sck	pin 23	gpio11
sda	pin 19	gpio10
res	pin 22	gpio25
dc	pin 18	gpio24
cs	pin 24	gpio8

wiring (keypad)

keypad	pi	gpio
r1	pin 35	gpio19
r2	pin 33	gpio13
r3	pin 31	gpio6
r4	pin 29	gpio5
c1	pin 40	gpio21
c2	pin 38	gpio20
c3	pin 36	gpio16
c4	pin 32	gpio12

button layout:

s1(1)   s2(2)   s3(3)   s4(A)
s5(4)   s6(5)   s7(6)   s8(B)
s9(7)   s10(8)  s11(9)  s12(C)
s13(*)  s14(0)  s15(#)  s16(D)

default keys (configurable in keypad section of config.yaml):

key	default	config option	function
1	s1	help	show help
2	s2	lpn	toggle LPN text on/off
3	s3	item	show last item info
A	s4	reconnect	force reconnect to WMS
B	s8	info	show network info
C	s12	history	toggle history sidebar
*	s13	clear	clear history
#	s15	toggle	toggle display on/off
D	s16	dev	switch dev/normal mode

setup

sudo bash install.sh

config

sudo nano /etc/zebra-proxy/config.yaml

logs

journalctl -u zebra-proxy -f

restart

sudo systemctl restart zebra-proxy

dev

make dev
make run-mock
make run-proxy