ELM327 AT Commands - SparkFun Electronics

1 ELM327 AT CommandsVersion in which the command first @1display the device @2display the device @3 ccccccccccccstore the device <CR>repeat the last Long (>7 byte) Timing Timing Timing a Buffer the Initialization hhtry Baud rate Divisor hhset Baud Rate handshake Automatic Formatting Automatic Formatting off CAN Extended hhuse CAN Extended Address hh hh hh hhset the ID Filter to hhhset the ID Filter to Flow Control Flow Control hh hh hh hhset the ID Mask to hhhset the ID Mask to hhset CAN Priority (only for 29 bit) CAN Receive Address hhhset CAN Receive Address to hhhhhhhhset CAN Receive Address to the CAN Silent Mode Silent Mode ddddCalibrate the Voltage to 0000 Restore CV value to factory all to of the DLC of the DLC OnCANElm Electronics Inc.

2 , October 2010 Page 1 of 4 ELM327 AT CommandsVersion in which the command first (J1939) Monitor for DM1 the current the Protocol by SD [1-5 bytes]Flow Control Set Data to [..] SH hh hh hh hhFlow Control Set the Header to SH hhhFlow Control Set the Header to SM hFlow Control Set the Mode to a Fast the 10set the ISO Baud rate to 48set the ISO Baud rate to 96set the ISO Baud rate to HIFR value from SIFR value from the IgnMon input hhset the ISO (slow) Init Address to J1939 Elm data Header Formatting Header Formatting J1939 SAE data the J1939 Timer Multiplier to the J1939 Timer Multiplier to the Key Word checking Word checking OnGeneralElm Electronics Inc.

3 , October 2010 Page 2 of 4 ELM327 AT CommandsVersion in which the command first to Low Power hhhh(J1939) Monitor for PGN hhhh n(J1939) Monitor for PGN hhhh, get n hhhhhh(J1939) Monitor for PGN hhhhhh n(J1939) Monitor for PGN hhhhhh, get n hhMonitor for Receiver = hhMonitor for Transmitter = Length (7 byte) xx yyset Protocol B options and baud FF OFFall Prog Parameters FF ONall Prog Parameters xx OFFdisable Prog Parameter xx ONenable Prog Parameter xx SV yyfor PP xx, Set the Value to a PP hhset the Receive Address to the stored an RTR the of Spaces of Spaces hhStore Data byte xx yy zzSet yzzSet a Slow AhSet Protocol to Auto, h and save hSet Protocol to h and save 00 Set Protocol to Auto and save hhSet the Receive address to hhOBDElm Electronics Inc.

4 , October 2010 Page 3 of 4 ELM327 AT CommandsVersion in which the command first Standard Search order (J1978) hhSet Timeout to hh x 4 hhSet Wakeup interval to hh x 20 hhset Tester Address to AhTry Protocol h with Auto hTry Protocol of Variable DLC of Variable DLC [1-6 bytes]Set the Wakeup xxyyzzaaset the Wakeup Message to xxyyzzaabbset the Wakeup Message to xxyyzzaabbccset the Wakeup Message to allGeneralElm Electronics Inc., October 2010 Page 4 of 4