REXYGEN Community Forum

mikeyh

Member

From: New Zealand

Registered: 2016-04-28

Posts: 44

USB TTL to modbus

Hi All,

Is it possible to use a USB - UART converter on the Monarco Hat to talk Modbus RTU to an external device. Would it require some coding or is it simpler than that?

Using the USB - UART converter I also have to add some hardware to turn it from full duplex to half so I can transmit over a single wire. But this shouldn't be an issue.

Cheers

Mike

jaroslav_sobota

Administrator

Registered: 2015-10-27

Posts: 535

Re: USB TTL to modbus

Hi Mike,
I'm a bit confused. USB converter has nothing to do with the Monarco HAT, you plug it into the Raspberry Pi.

Also the full/half duplex is a bit unclear to me. What external device are you planning to talk to? Is there any datasheet/documentation available?

Please clarify the above so I can give some advice.

Kind regards,
Jaroslav

---

Monarco HAT for Raspberry Pi - Lightweight I/O for monitoring, archiving and control.
Raspberry Pi in industrial automation!

mikeyh

Member

From: New Zealand

Registered: 2016-04-28

Posts: 44

Re: USB TTL to modbus

Sorry to confuse the issue....! I guess what I'm trying to do is transmit Modbus through a USB to TTL adapter using REXYGEN. Would I need to use some coding for this?

Thanks

Mike

jaroslav_sobota

Administrator

Registered: 2015-10-27

Posts: 535

Re: USB TTL to modbus

Hi Mike,
no coding is required. You just configure the Modbus driver to use e.g. /dev/ttyUSB0.

Jaroslav

---

Monarco HAT for Raspberry Pi - Lightweight I/O for monitoring, archiving and control.
Raspberry Pi in industrial automation!