ASC1 TX and RX swapped ? (EHS6T USB) | Telit Cinterion IoT Developer Community
October 18, 2017 - 4:56am, 1635 views
Hi, im experiencing something odd with the EHS6T (USB).
When connecting the arduino uno TX (pin 1 on the arduino) to the EHS6T RXD1 (pin 4) there is no communication from the arduino to the EHS6T. But if I connect the arduino TX pin to TXD1 (pin 3) then communication works flawlessly.
Other connections performed are:
Arduino GND ---- EHS6T GND (pin 2)
EHS6T VCCref (pin 1) ---- EHS6T +5Vout (pin 7)
Is this a normal behaviour ? Im using RS232Demo.jar ("comm:COM1;blocking=on;baudrate=115200") as a base for the program (reading with inStream.read();).
Hello,
This is correct. Please see the EHS6 Hardware Interface Description docuemnt:
EHS6 is designed for use as a DCE. Based on the conventions for DCE-DTE connections it communicates with the customer application (DTE) using the following signals:
• Port TXD @ application sends data to module’s TXD1 signal line
• Port RXD @ application receives data from the module’s RXD1 signal line
Bestr regards,
Bartłomiej