HSERIN String reading

[richard]

this will help , but maybe the serial data will need to be inverted
the pic chip expects the data line to idle " high"

mai var byte[16]
Lcdout $fe, 1
pause 200

main:
hserout ["ATI",13,10]
pauseus 300
HSerin 2000,main,[STR mai\16]  ;>ati ELM327 v1.5

pause 2000
Lcdout $fe, 1
lcdout  str mai\16

[Dave]

Looking at the garbled data I would first look at the interface levels and states. When I used one of these OBD interface chips quite a few years ago it was designed to be connected DIRECTLY to the PC. That means the signals are already inverted. To interface it to a PIC you will need to Re-invert the TX and RX signals before connecting it to the PIC. Look at the data sheet. I used an ELM322D OBD(VPW) device.