UART protocol

Basic specifications 9600baud.

The MCU uses two UART communication channels, one for SCU communication, the other for ground command & monitoring purpose aux UART connector. Both serial connections functions identical, commands and return values are exact the same.

UART command list overview

Read commands

command	Function	return value	parameter
rdt	current RTC datetime	Str 'YYYY-MM-DD HH:MM:SS'
rdm	debug mode
rom	operation mode	Str 'RECOVERY', 'SCIENCE'
rsc	read charger status	Str
rsg	read gauge status	Str
rsl	system status log	Str
rsp	power switches modes	Str
rst	temperature sensor dump	'a' or 0-14
rsi	read i2c lock status	none
ris	ignition status	Str 'standby', 'charging', 'charged', 'failed'
rta	read keep alive & wakeup timer settings	none

Write commands

command	Function	parameter	return
wlf	frontlight LED	int 0-255
wlb	backlight LED	int 0-255
wdn	set datetime now	Str '2017_9_16_20_14_00'
wdr	set recovery datetime	Str '2017_9_16_20_14_00'
wux	usb x mass storage power	0 (off) or 1 (on)
wua	usb a mass storage power	0 (off) or 1 (on)
wub	usb b mass storage power	0 (off) or 1 (on)
wps	write power science	0 (off) or 1 (on)
wsd	scu sd mass storage selection	1 or 2
wvs	write vibration sequence	58_10_10_10_58_10_10_10
wit	write ignition threshold	0-30 Volts

Execute commands

command	Function	parameter	return
evg	vibration motor go
evs	vibration motor stop
etk	SCU keepalive timer	int sec
etw	SCU wakeup timer	int sec
eiv	arc cap charge target voltage	int V
eia	abort charging	-
eii	request ignition with target voltage	int V
eit	test ignition without arc	-
er42	trip watchdog to reset	-
edm	1 = enable debug mode, 0 = disable debug mode	-