AT Commands v21 - Total Car Diagnostics

1 Elm Electronics Inc., March 2014 Page 1 of 4 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) the Activity Monitor hhset Activity Monitor Timeout to 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)

2 CAN Receive Address hhhset CAN Receive Address to hhhnow accepts don't cares (X's) hhhhhhhhset CAN Receive Address to hhhhhhhhnow accepts don't cares (X's) the CAN Silent Mode Silent Mode the CAN Timer Multiplier to 1xCANElm Electronics Inc., March 2014 Page 2 of 4 elm327 AT CommandsVersion in which the command first the CAN Timer Multiplier to 0000 Restore CV value to factory ddddCalibrate the Voltage to all to of the DLC of the DLC (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 1xJ1939 Elm Electronics Inc.

3 , March 2014 Page 3 of 4 elm327 AT CommandsVersion in which the command first the J1939 Timer Multiplier to the Key Word checking Word checking 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 ww xx yy zzSet Header to ww xx yy zzOBDElm Electronics Inc.

4 , March 2014 Page 4 of 4 elm327 AT CommandsVersion in which the command first xx yy zzSet Header to xx yy xyzSet Header to a Slow 00 Set Protocol to Auto and save AhSet Protocol to Auto, h and save hSet Protocol to h and save hhSet the Receive address to 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 allGeneral