[RC232] Are the RC1140 and RC1240 compatible No. They are not compatible. Last Update: August 8, 2017 July 7, 2017 2365 RC232 Q&A Related Knowledge Base Posts -[RC232] Do RC232 series offer automatic baud rate detection?[RC232] Does your module (RC1780HP-RC232) have frequency hopping function?[RC232] “i have some questions for RC1701HP-RC232. Need the “tx” pin a levelshifter or driver-ic (our previous experience with RC1280 was a f—ing 100KR impedance!!!) ? Are on the “tx”, “rx” and “cts” pins resistors in series? Can I connect “tx”,”rx” and “cts” directly to a MCU (XMEGA @ 3,3V)? “