rs485 turn on a relay

[DrPickles]

After googling a large portion of my day away, I found I am stuck

I have purchased a rs485 usb dongle “USB to RS485 Converter Adapter ch340” to be exact

With a r421a08 Relay board. I can turn relays on and off using a python test script.

(https://github.com/Erriez/R421A08-rs485-8ch-relay-board)

 I would like to be able to send commands using autoit.

I have tried to use putty and send commands, but I have no idea how to do so.

 If some one can give an example on how to turn on and off a relay, I would be much obliged.

[FrancescoDiMuro]

  On 11/6/2018 at 2:10 AM, DrPickles said:

 I would like to be able to send commands using autoit.

Expand  

Does this Python script have a GUI?

Does it accept command line parameters?

[DrPickles]

it does, and yea I compiled it to an EXE for a run as…But my goal is to make my own EXE with the command in autoit.

Cascading EXEs really seems like a, not good idea.

[careca]

It may be possible to convert the code, but i know nothing of python.

I guess you'd have to go through python and find the equivalent in autoit.

Step by step, communicate with the correct port

Edited November 6, 2018 by careca

[Danyfirex]

Hello. You just need to find a COM library around the forum. Then send the correct Command to the COM port.

 

Saludos

[DrPickles]

I imagine that I could turn on the relay with putty if that were the case.

anyone have any ideas as how to do this manually? if I can do it though putty I can do it though autoit.

 

I wonder if the issue is with the relay board and how it expects to be treated more then the serial usb dongle.

[Skeletor]

I assume you are using the Modbus protocol?

[AdamUL]

If you want to use PuTTY with the command line, try using Plink.  There are different Plink UDFs around the forum.  Here's the one I used to connect to a Mac computer, but you should be able to use the Plink functions for what you need.  

 

Adam

 

[DrPickles]

  On 11/8/2018 at 10:13 AM, Skeletor said:

I assume you are using the Modbus protocol?

Expand  

just putty over com port, is this something that is not text driven?

[iamtheky]

i think @AdamUL is right.  Here is my flavor of Plink command organization (with bonus pipe to log)

 

 

[DrPickles]

I guess the issue is, I have no idea what to send to this com port plink prompt.

I have tried things like "com4 1 on 3" which translates to send to com 4 channel 1 turn relay 3 on.

Is this an issue with me not sending hex? is Com supposed to be capitalized? do I need to send the relay in binary?