When the serial communication with DMC80H is not smooth, the possible reasons are improper parameter setting, wrong or poor hardware connection, improper use of software, or errors in transferred program, etc. Sometimes it’s really a lot of trouble to find the problem. To our experience, communication parameters can be simply set as follows:
Baud rate 19200
No parity
Stop 2
Data 7
After such, if still not normal, turn to check other things.
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