Problem pymodbus master/client can send a request to the slave/server. The slave/server make the things to return ready and is waiting for the master/client to pick them up. Despite the readiness ...

I'm trying to learn the RS-485 interface by sending data between two Linux computers. The main computer is running ubuntu16.04 and the other is running a debian based system on kernel 4.19. The ma...

I am using the following code to access the RS485 slave but I get the error: Error reading ioctl port (25): Inappropriate ioctl for device My code is as follows: #include <linux/serial.h&g...

I'm attempting to get an RS485 adapter connected at the UART to communicate via modbus on a Raspberry Pi. My end goal is to have all this working with a Node application, but so far my dev has been...

This weekend I am going to make a little project. Got a solarcell inverter (Danfoss ULX 3600i) which I will try to connect to my linux machine, to see if I can grab the data from it, how much energ...

am new to Modbus and developing an application using Modbus RTU. I would like to know how to find out the RTU message frame separation time. In the Modbus RTU specification, It mentions 3.5 chars t...

I am trying to read a register from an RS485 adapter using a UART connection on an ARM board with no success Machines ARM board: CM-T335 - TI AM335x Computer-on-Module http://www.compulab.co.il/...

I'm trying to setup half duplex communication in my program. I have my RS485 transceiver using the RTS flag (TIOCM_RTS) to toggle back and forth between transmit and receive. And to send/receive da...

I'm trying to use a Beaglebone Black running Angstrom (3.8 kernel) to communicate with devices on a half-duplex RS-485 network at 9600-N-8-1. I'm trying to use an RS-485 Breakout board similar to...

Can someone suggest an open source implementation of a Modbus RTU Slave for a Microchip PIC18 processor? I'm looking for an implementation of Modbus RTU for RS-232/RS-485, but a Modbus TCP/IP imple...

I have been tasked with the implementation of the ModBus protocol over a RS485 2-wire system. (Actually it's three wires, A/B and GND). ModBus is not the point though, but the step before that...si...

I'm searching for an industrial serial to USB converter. I want to use it within my JAVA application to communicate with various devices. Therefore the serial adapter has to provide a mode fo...

I want to communicate between my PC and some controller boards. The expectation is that the PC will send an identifier of the board on RS-485 and then it should receive the answer from the board. ...