Reading Sensor values digitally with RS485 - Arduino Forum
Feb 5, 2019 · Hello everyone, I don't have much experience with the Arduino yet and am currently trying my first bigger project. However, I'm reaching my programming limits and look for advice in the …
RS485 Issues, no data being recieved - Arduino Forum
Oct 31, 2024 · rs485 shield was connected to the rx and tx pins on the uno? Not Uno, but Uno R4. It is connected to rx and tx pins, and that's Serial1. Not Serial, which is connected to Usb. reece_clayton …
RP2040 - RS485 modbus RTU - 3rd Party Boards - Arduino Forum
Feb 14, 2022 · I'm also handling a Modbus RTU issue. I'm using the Arduino Modbus Library, and I can verify my code on UNO and Mega, but when I try to compile the same code in RPI PICO, the RS485 …
Arduino modbus setup - General Guidance - Arduino Forum
Feb 12, 2023 · Using modbus, i want to an Arduino c program that moves the AC Servo one revolution. Using a C25B RS485 to TTL converter; Is my "Arduino to AC Servo" hardware setup correct? will the …
RS485 / Modbus RTU on Opta - Arduino Forum
Jan 21, 2025 · Arduino Opta with both USB-RS485 modules: On the receiving end, I kept getting incorrect characters for anything I sent. I experimented with baud rate adjustments (±5% in steps of …
RS485 and UART - Programming - Arduino Forum
Oct 17, 2014 · Hello everyone! So what I am trying to do is receive a command using UART and when that command is received send a message out on a RS485 module I have. So basically right now I'm …
ESP32 sending serial data with RS485 - Arduino Forum
Apr 3, 2024 · did you do a loop-back-test by connecting the two RS485-chips with each other and by looping back through connecting Tx with Rx? Did you do a pre-test if serial send / receive works …
Joining Arduino Devices using RS485
Feb 16, 2025 · Hi all, I need to do the following: Connect multiple Arduino devices in a daisy chain (I can only find pictures for 2 connected devices online) The Master is a ESP32 (3.3v logic) and the other …
Simple Modbus Slave RS485 Invalid CRC problem - Arduino Forum
Sep 23, 2016 · Hello, I'm configuring my RFID readers system. I have 3 Arduinos (slaves), each of them has own RFID reader, and I would like to connect them via Modbus RS485 with my PLC driver Delta …
Arduino master/slave communication using RS485 and Modbus protocol
Mar 24, 2020 · Hi to all! First time on the arduino forum and a total beginner regarding arduino modbus communication. I have a configuration: Master (Arduino MEGA ATmega2560), 2x MAX485 module …