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ELM327
ELM327DSJ Elm Electronics – Circuits for the Hobbyist
www.elmelectronics.com
AT Command Summary (continued)
OBD Commands
AL Allow Long (>7 byte) messages
AMC display Activity Monitor Count
AMT hh set the Activity Mon Timeout to hh
AR Automatically Receive
AT0, 1, 2 Adaptive Timing off, auto1*, auto2
BD perform a Buffer Dump
BI Bypass the Initialization sequence
DP Describe the current Protocol
DPN Describe the Protocol by Number
H0, H1 Headers off*, or on
MA Monitor All
MR hh Monitor for Receiver = hh
MT hh Monitor for Transmitter = hh
NL Normal Length messages*
PC Protocol Close
R0, R1 Responses off, or on*
RA hh set the Receive Address to hh
S0, S1 printing of Spaces off, or on*
SH xyz Set Header to xyz
SH xxyyzz Set Header to xxyyzz
SH wwxxyyzz Set Header to wwxxyyzz
SP h Set Protocol to h and save it
SP Ah Set Protocol to Auto, h and save it
SP 00 Erase stored protocol
SR hh Set the Receive address to hh
SS use Standard Search order (J1978)
ST hh Set Timeout to hh x 4 msec
TA hh set Tester Address to hh
TP h Try Protocol h
TP Ah Try Protocol h with Auto search
J1850 Specific Commands (protocols 1 and 2)
IFR0, 1, 2 IFRs off, auto*, or on
IFR H, S IFR value from Header* or Source
ISO Specific Commands (protocols 3 to 5)
FI perform a Fast Initiation
IB 10 set the ISO Baud rate to 10400*
IB 48 set the ISO Baud rate to 4800
IB 96 set the ISO Baud rate to 9600
IIA hh set ISO (slow) Init Address to hh
KW display the Key Words
KW0, KW1 Key Word checking off, or on*
SI perform a Slow (5 baud) Initiation
SW hh Set Wakeup interval to hh x 20 msec
SW 00 Stop sending Wakeup messages
WM [1 - 6 bytes] set the Wakeup Message
CAN Specific Commands (protocols 6 to C)
CEA turn off CAN Extended Addressing
CEA hh use CAN Extended Address hh
CAF0, CAF1 Automatic Formatting off, or on*
CF hhh set the ID Filter to hhh
CF hhhhhhhh set the ID Filter to hhhhhhhh
CFC0, CFC1 Flow Controls off, or on*
CM hhh set the ID Mask to hhh
CM hhhhhhhh set the ID Mask to hhhhhhhh
CP hh set CAN Priority to hh (29 bit)
CRA reset the Receive Address filters
CRA hhh set CAN Receive Address to hhh
CRA hhhhhhhh set the Rx Address to hhhhhhhh
CS show the CAN Status counts
CSM0, CSM1 Silent Monitoring off, or on*
CTM1 set Timer Multiplier to 1*
CTM5 set Timer Multiplier to 5
11


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