I am running Mango on my laptop PC running Windows 10.
I have a Sparkfun USB to RS-485 Converter https://www.sparkfun.com/products/9822
When I connect a MODBUS device, Thermostat the Mango software does not recognize the device. I have the Salve address and baud rate set correctly, but when I use the "Modbus Read Data" screen and click on the "Read Data" button I always get "No Response from slave 2"
I also tried 2 other MODBUS devices, another different thermostat and a refrigeration controller and I get exactly the same result.
I also notice that I can see the TX LED blinking on the USB->RS485 converter, but I never see the RX LED illuminate.
Any suggestions as to why the Mango software cannot read the slaves devices?