[RC232] Are the modules full duplex ? Module is half duplex. Sent and receive but not at the same time. Last Update: August 8, 2017 February 3, 2017 2813 RC232 Q&A Related Knowledge Base Posts -[RC232] Please confirm if packet_length should be configured to total number of bytes including overhead (26 in my case) or only effective payload (15 in my case)[RC232] When the module is receiving data from the air, is it possible to send data from the host on the UART RXD ?[RC232] Have your heard of Modbus… do you have any experience..?