16F877A HSERIN problem

[mister_e]

Try changing

DEFINE HSER_CLOERR 1 ' automatic clear overrun error

to

DEFINE HSER_CLROERR 1 ' automatic clear overrun error

the timeout may screw or not the whole thing, try to remove it first. Once you get it working, you may decide to use interrupt instead.

If it was for me, i would probably use a single WAIT and parse the whole string at the end to validate the result.