[RC232] I would like to know how to use the pins N°27 and 28 on the RC2500HP Pin 27 and 28 must be left open. Last Update: August 8, 2017 December 20, 2016 2654 RC232 Q&A Related Knowledge Base Posts -[RC232] Does your module (RC1780HP-RC232) have frequency hopping function?[RC232] I can’t find out in documentation, how to change RF data rate in volatile memory only in RC1780HP module. In “RC232 Embedded RF Protocol User Manual v1.5” there is no such command specified[RC232] How can I send a pulse from the module?