rs485 modbus

I am using the MAX485 IC for RS485 communication between an ATmega64A main controller and ATmega328PB sensor nodes over CAT6 cable. Setup: Sensor-to-sensor distance: 3 metres Main controller to first sensor: Variable (3 m, 10 m, 20 m, 30 m, etc.) Topology: Daisy chain Test Results: Single...

Problem Statement I am working with an RS485-based sensor communication system. My PCB has two separate RS485 transceiver ICs, each with an independent communication bus: RS485 IC U8 → A/D1+ and B/D1− bus RS485 IC U10 → A/D2+ and B/D2− bus The issue occurs only with U8 and the A/D1+, B/D1−...

I've tried one from Waveshare and I can't get past the Engrish in the instructions. One would think its a simple thing. The Waveshare Modbus USB converter worked no problem so I know my cable is correct. The distance between the Modbus unit and the converter is only inches. I need a Modbus...

I’m developing a Modbus RTU architecture. The master of this architecture is my Beagebone Black , which I want to connect via RS-485 serial communication to my sensors. Since I’m using RS-485 converters (RS-485 Converter) which need a UART input as far as I understand, I was looking for sensors...

So about to buy parts for a Cub Scout model rocket launch control system! Yay!!! It is made of multiple boxes, each with a big 12V battery and an Arduino, networked together. At the launch pads, each Pad Box needs to power both the static 5V control logic AND 12V through relays to between one...