User Manual

Family Reference and Programming Manual
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5.0 AT Commands
This section lists the AT commands supported by
the STN11xx. Every effort was made to maintain
compatibility with legacy ELM327 software, and for
most purposes, these commands work exactly as
described in the ELM327 datasheet. Please refer to the
“AT Commands” section of the ELM327 datasheet for
the complete description of the AT command set.
Asterisk (*) marks default setting.
General Commands
Command Description Status
<CR> Repeat last command supported
BRD hh Try baud rate divisor hh supported
BRT hh Set baud rate timeout supported
D Set all settings to defaults supported
E 0/1 Echo off/on* supported
FE Forget events not applicable
I Print ELM327 version ID string supported
1
L 0/1 Linefeeds off*/on supported
LP Enter low power mode supported
M 0/1 Memory off/on* supported
WS Warm start supported
Z Reset device supported
@1 Display device description supported
2
@2 Display device identifier supported
@3 cccccccccccc Store device identifier supported
Programmable Parameter Commands
Command Description Status
PP xx OFF Disable PP xx supported
PP FF OFF All PPs off supported
PP xx ON Enable PP xx supported
PP FF ON All PPs on supported
PP xx SV yy For PP xx, set value to yy supported
PPS Print PP summary supported
Voltage Reading Commands
Command Description Status
CV dddd Calibrate voltage to dd.dd volts supported
RV Read voltage supported
Other Commands
Command Description Status
IGN Read SLEEP input level supported