Operation Manual

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ELM327
ELM327DSJ Elm Electronics – Circuits for the Hobbyist
www.elmelectronics.com
New AT Commands:
@2, @3, CRA, D0, D1, JE, JS, KW, MP, RA,
RTR, S0, S1, SP00, V0, V1
New Programmable Parameters:
2A
v1.3a
New Features:
-Added wiring checks to detect when the
J1962 CAN pins are used for other functions
New AT Commands:
FE
New Programmable Parameters:
none
v1.4
New Features:
-Added Low Power (sleep) mode
-Added extended addressing mode for CAN
protocols
-Added 4800 baud ISO 9141 and ISO 14230
support
-ISO 9141 and ISO 14230 can be manually
initiated
-Provided a single EEPROM byte for user
data storage
-All interrupts now say STOPPED (not just
when searching)
New AT Commands:
CEA, CV 0000, FI, IB48, IGN, LP, PB, RD,
SD, SI, SS, TA
New Programmable Parameters:
0E, 12, 15, 19, 2C, 2E
v1.4a
Elm Electronics never made a v1.4a
v1.4b
New Features:
-Able to provide active or passive CAN
monitoring
-New CRA command to restore the mask and
filter to their default values
-Several SAE J1939 improvements
New AT Commands:
CRA, CSM0, CSM1, JHF0, JHF1, JTM1,
JTM5, MP (with # messages)
New Programmable Parameters:
21
v2.0
New Features:
-Increased the RS232 Tx buffer to 512 bytes
-New Activity Monitor watches all OBD inputs
-Wake from Low Power now retains settings
-The CRA commands now accept X’s for
input
-New PP's provide extensive ISO/KWP
control
-Brownout reset voltage reduced to 2.8V
New AT Commands:
AMC, AMT, CRA (with X’s), SH (4 byte)
New Programmable Parameters:
0C, 0F, 14, 15, 19, 1A, 1B, 1C, 1D
v2.1
New Features:
-Many optimizations for increased speed
-Detects response pending replies (7F xx 78)
and adjusts timeouts for same
-CAN searches now measure frequency and
block sends if there is a mismatch
New AT Commands:
CTM1, CTM5
New Programmable Parameters:
1E, 28
Version History (continued)