[RC232] Are the RC1140 and RC1240 compatible No. They are not compatible. Last Update: August 8, 2017 July 7, 2017 1569 RC232 Q&A Related Knowledge Base Posts -[RC232] Do you consider that the 2.4Ghz antenna alone allows to reject the GSM signal to prevent damage on the RC2500 ?[RC232] What is the range of the module RC1180-RC232 868 MHz? Can this module communicate over a distance of 500m?[RC232] How can I get world-wide coverage in sub-giga frequencies