The LM410 is the same as the LM400 with the exception of an antenna.
- Check the software version number of your module.
- If 6.18/6.19 then it should have flow control enabled. So when connecting TX/RX lines you need to connect the CTS and RTS lines as well.
- Version 6.64/6.61/6/57 has default flow control disabled and will only work with TX/Rx /GND line connection.
- If specific software is required where the default settings are Resp-, Echo-, then the LM149 cannot be used directly. The LM149 works properly if the test module has Resp+, Echo+ settings.