Posted 31 Aug 2017 hello, i'm using Micro830 to receive serial data from matlab and hyperterminal. i followed article 448488 - how to read ASCII in Micro800 controller. However, ACB can receive data but ARD can not. Then i added a contact before ARD. Once i check and recheck it, then ARD can receive data and ACB value will be cleaned. the 55 showed on the ARD is the value from previous buffer Share this post Link to post Share on other sites