@mikeyh
Hello Mike,

Yes, it's possible to use both RS485 for RTU on the Monarco and the USB on the RPi for RTU simultaneously. Check out the illustrative example "0121-11_Monarco_HAT_Modbus_RTU_Loopback_USB." This example features two distinct Modbus drivers: one for /dev/ttyAMA0 (Monarco HAT) and another for /dev/ttyUSB0.

Cheers,
Jan

Hi Mike,

I know that @RexPeter use it on his setups with REXYGEN - maybe he can share some experiences with that.

Kind Regards,
Tomas

Hi Phil,

A colleague has already responded to your query via support. To ensure we have all the information, I’m adding some additional questions here on the forum as well. We need more details from you:

Has the problem been present since the beginning, or did something change? What has changed? Did the LEDs work well before? What REXYGEN project are you using? Can you try running the "0121-09 Monarco HAT Demo Example" and see if you can trigger the LEDs? What does the system log say?

Best regards,
Jan