This a OrCad PCB Schematic to a very simple ELM327 to uC board.Tested and ok. The board can suply 5V to any plataform from the cars suply. It uses 10 pin cable containing: +5V, GND, ELM RX, ELM TX, ELM BUSY and ELM RTS signals.-This is a OrCad PCB Sc

elm327 数据手册，可以读取汽车OBD 总线数据，读出故障数据等-elm327 datasheet