[RC232] What should I check to confirmt that my module is correct connected

Pull ON/OFF pin high for power ON the module, CONFIG must be pulled high when not in CONGIG mode, Connect RXEN and TXEN directly to VDD if you will not use hardware enabling of SLEEP mode. Software activated SLEEP using Z-command will still work.

Last Update: August 8, 2017  

December 20, 2016   1288    RC232 Q&A