Operation

Operation

Navigation

Button	Action
LEFT / RIGHT	Previous / next menu
UP / DOWN	Previous / next screen within the current menu
SELECT	Context action (varies per menu — see below)

Menu order: Cockpit → Experimental → Debug → DTC → Settings

Cockpit screen (ADDR_INSTRUMENTS 0x17)

Displays all vehicle data on a single 64×128 screen. All fields update simultaneously at ~177 ms intervals.

Row  0: SPD:xxx  RPM:xxxx
Row  1: CLT:xxx  OIL:xxx
Row  2: OLV:x OPR:x AMB:xx
Row  3: ODO:xxxxxxxxxx
Row  4: FUL:xx  FSR:xxxxx
Row  5: TIME:xxxxxxxxx
Row  6: L/100:xxxxx L/h:xxxx
Row  7: km:xxxxx  L:xxxxx

Field	Description
SPD	Vehicle speed (km/h)
RPM	Engine speed (rev/min)
CLT	Coolant temperature (°C)
OIL	Oil temperature (°C)
OLV	Oil level OK — 1=OK, 0=low
OPR	Minimum oil pressure (bar)
AMB	Ambient temperature (°C)
ODO	Odometer (km)
FUL	Fuel level (L)
FSR	Fuel sender resistance (Ω)
TIME	ECU uptime (seconds)
L/100	Fuel consumption rate (L/100 km) since connection
L/h	Hourly fuel consumption (L/h)
km	Trip distance (km) since connection
L	Fuel burned (L) since connection

SELECT has no action on the Cockpit screen — data is always live.

Cockpit screen (ADDR_ENGINE 0x01)

Two screens, UP/DOWN to switch:

Screen 0:                Screen 1:
RPM:xxxx  V:xxxxx        TBa:xxxxx STa:xxxxx
T1:xx T2:xx T3:xx        mbar:xxxx bits:xxxxxxxx
LAM:xxx LAM2:xxx
LOAD:xxx

Experimental screen

Shows raw measurement group values. SELECT toggles between measurement slots 0/1 and 2/3.

Debug screen

Internal diagnostic readouts (only present in uno_debug builds with OBD_EXPERIMENTAL_SCREENS defined).

DTC screen

Screen	SELECT action
DTC screen 0	Read fault codes from ECU
DTC screen 1	Clear fault codes on ECU

After reading, the count of stored DTCs is shown briefly. After clearing, a confirmation overlay appears.

Caution: Do not clear DTCs on address 0x15 (airbag) if an electrical fault is present — on some affected ECUs this can deploy the airbag.

Settings screen

Screen	SELECT action
Settings screen 0	Exit ECU session and return to setup
Settings screen 1	Cycle KWP mode: ACK → GROUP → SENSOR

KWP modes

Mode	Behaviour
ACK	Keepalive only — no sensor data
GROUP	Read measurement groups (most data)
SENSOR	Full sensor read (slower, more detailed)