nano com port (RS485) to Auto RS 485 and GSM modem

[Tito]

Hi, Mr. Gary & I did 2 way communication between FMD88-10 with GSM modem to send & receive SMS was successful done.

Currently i am trying out with Nano board , GSM modem and using Auto-RS485 between for comm port purpose. I am unable to establish communication. Mean while i did test out with ADAM 4520 (RS232-RS485 isolated converter) seem to work fine.

Is that possible to establish communication with Auto  RS485?

Thank you.

[support]

First try to determine if the Auto485 is working properly. Did you connect power to the Auto485 adapter? Auto485 require power supply in order to work.

If you did power it up, then try using the TLServer through the PC RS232 port to connect to Auto485, then connect from Auto485 to Nano-10 and try to go online monitoring:

PC(RS232) ->Auto485 -> Nano-10 (RS485)

If you can go online monitoring then the Auto485 is working. Now you can try to get the Nano-10 to talk to your RS232 modem through the Auto485.  It should work. If it doesn't then it could be a turn around timing issue.

[Tito]

Hi, I did as you said.
1) Powered up
2) transfer program to Nano.
3) monitor online

Which i did earlier.

Now I do turnaround time adjustment knob (0.5ms - 1.5ms) between and seem to be working.

thank you.