ELM323 - OBD (ISO) to RS232 Interpreter
The ELM323 completes our trio of OBDII ICs, allowing you to talk to your ISO 9141-2 or ISO 14230-4 standard OBDII equipped vehicle using an RS232 serial connection. It transparently converts between a 10.4KHz ISO data stream and standard ASCII characters, allowing trouble codes and operating parameters to be easily retrieved without the need for special software. No knowledge of data formatting, error checking, bus initiation etc. is needed either, as the ELM323 handles all of it for you.
The present version of the ELM323 (v2.0) provides several programmable features that the previous versions did not offer. It now allows programmable header bytes, adjustable timeouts, the ability to report in the packed data mode, and offers a special monitoring mode as well. This is in addition to all of the capabilities that the v1.x ICs offered - the full seven byte command structure, two line (K and L) initiation, software selectable linefeeds and character echoing, and the visual feedback provided by the four LED outputs.
Description of ELM323
The ELM323 is a 14 pin integrated circuit that, with only a few esternal components, is able to convert between the OBD data format and the standard RS232 serial data format. This allows virtually any personal computer or PDA to communicate with a vehicle using only a standard serial port and a terminal program. If desired, hobbyists can even create their owm custom 'scan tool' by adding an interface program.
Please note that wile this ingergrated circuit has undergone to be an experimeter's cuicuit. It does support a great many of the ISO9141 and ISO14230 (KWP200) protocol vehicles, but not all of them, due to the many interpretations of these standars that are to be found in use.
Features of ELM323
Low power CMOS design
Crystal controlled for accuracy
ISO 9141-2 and ISO 14230-4protocols
Configurable with AT commands
Standard ASCII character output
Four high current LED drive outputs
ELM323 - OBD (ISO) to RS232 Interpreter
The ELM323 completes our trio of OBDII ICs, allowing you to talk to your ISO 9141-2 or ISO 14230-4 standard OBDII equipped vehicle using an RS232 serial connection. It transparently converts between a 10.4KHz ISO data stream and standard ASCII characters, allowing trouble codes and operating parameters to be easily retrieved without the need for special software. No knowledge of data formatting, error checking, bus initiation etc. is needed either, as the ELM323 handles all of it for you.
The present version of the ELM323 (v2.0) provides several programmable features that the previous versions did not offer. It now allows programmable header bytes, adjustable timeouts, the ability to report in the packed data mode, and offers a special monitoring mode as well. This is in addition to all of the capabilities that the v1.x ICs offered - the full seven byte command structure, two line (K and L) initiation, software selectable linefeeds and character echoing, and the visual feedback provided by the four LED outputs.
Description of ELM323
The ELM323 is a 14 pin integrated circuit that, with only a few esternal components, is able to convert between the OBD data format and the standard RS232 serial data format. This allows virtually any personal computer or PDA to communicate with a vehicle using only a standard serial port and a terminal program. If desired, hobbyists can even create their owm custom 'scan tool' by adding an interface program.
Please note that wile this ingergrated circuit has undergone to be an experimeter's cuicuit. It does support a great many of the ISO9141 and ISO14230 (KWP200) protocol vehicles, but not all of them, due to the many interpretations of these standars that are to be found in use.
Features of ELM323
Low power CMOS design
Crystal controlled for accuracy
ISO 9141-2 and ISO 14230-4protocols
Configurable with AT commands
Standard ASCII character output
Four high current LED drive outputs
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