ELM327 (v1.4b) Multi Protocol OBDII to RS232 Interpreter - PDIP

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ELM327 v1.4b

The ELM327 has been improved once again, with more error checking, code improvements, and of course, new features.

  • Power Control provides a very low power standby mode
  • More J1939 support
  • A non-volatile memory location for storing user data
  • An option to turn off the CAN silent monitoring for bench testing, or when connecting to a dedicated CAN port
  • CAN extended addressing support for experimenting with special data formats
  • The ISO/KWP bus initializations may now be performed without having to send a request
  • A 4800 baud ISO option, to compliment the 10400 and 9600 rates
  • An SS command for searching sequentially through the protocols
  • A TA command to change the Tester Address without using a PP
  • The ability to quickly restore the factory calibration for the voltage reading circuit

This is a multi protocol IC. It combines the ELM320, ELM322 and ELM323 into one IC, also adds CAN support (ISO 15765-4) as well.

  • RS232 baud rates to 500 Kbps
  • Adaptive Timing automatically adjusts ST timeouts
  • Power up to AT MA is selectable
  • Source (tester) address can be changed
  • Can reset all PPs with a jumper
  • Receive addresses can be independently set
  • Supports J1850 VPW and PWM, ISO 9141-2, ISO 14230-4 as well as ISO 15765-4.
  • Uses the same simple ascii command interface.
  • Internal EEPROM can remember the last protocol.
  • Voltage input monitors your vehicle battery.
  • The slow initiation address can now be varied
  • Control over key word checking
  • KWP protocols can now transmit 3 or 4 byte headers
  • New J1939 protocol
  • Two user-definable CAN protocols
  • Improved error handling and recovery





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  • Model: ELM327-IC

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