2016年1月31日 · On the Arduino side, you can use the Serial1 (or equal) to write data out to the MAX485, which drives the wires. I suggest again to start with a simplex system, i.e. Arduino only writes data, the PC just reads data. Note that you have to use exactly the same bit rate on Arduino as well as on the PC side. Watch out when you open up the terminal.

2021年4月11日 · The MAX485 module (MAX485 in Banggood) is the more commonly used module for this purpose and has been used in many projects. The MAX485 has the following pins DI (data in), RO (receiver out), DE (Data Enable), RE (Receiver Enable), VCC, GND and the 'A' and 'B' pins for the RS485 device (Shown below).

2022年8月24日 · The latter doesn't support it apparently. It looks like a common MAX485 type design which doesn't. Instead it exposes driver enable and receiver enable pins. These are normally active at opposite levels, which allows you to tie them together and run them to a single pin on the Arduino for controlling both at the same time.

I am trying to use Arduino as Modbus- RTU slave and Raspberry Pi as a Modbus master I have interfaced Max485 (RS485 to TTL converter) with Arduino and Rs485 to USB converter in Raspberry Pi, Initially, I was able to send data from Arduino to Raspberry Pi, but the data seems to inconsistent and fails to read most times

2021年4月30日 · I need to interface MAX485 TTL-to-RS485 to the ESP8266 on different serial pins (other than GPIO3 and GPIO1). Is there a way to configure other pins as Rx and Tx? Please suggest any other ways to achieve this. EDIT-1: I need to use two serial ports at the same time (one with the CH341 and another with TTL-to-RS485). Please help with this.

Max485 is a classic, probably has it, if not, look for Application Notes on RS-485, TI has good material on this. – mFeinstein Commented Sep 4, 2019 at 13:39

2023年5月13日 · I'm trying to connect sesnor that use RS485 (I'm almost sure that's modbus). The sensor has RX/TX and +/- wires. Do I still need a component between the RX/TX pin from the Arduino UNO and the sensor

I'm using the RS485 protocol (Modbus RTU) to control an inverter by using a MAX485 TTL converter. Now I also have a relay board (8 channel) to be able to toggle some lightning and sound devices. Both the inverter and the relay board, as well as the power supply, are located in another box, which I call the power box.

I am trying to establish a communication between Arduino Uno ( Master) and ESP32 (Slave) using RS485 protocol (using MAX485 module). I have successfully done this between two Arduino Unos. SoftwareSerial library is what i am using between two Arduino Unos, now trying with ESP32 and Arduino Uno (using MAX485 module) .

2017年12月14日 · I'm building a Master-Slave system using some arduino pro mini as slaves and a Mega 2560 as Master to communicate over RS485 config via MAX485. Since i'm newbie in RS485 i know that i need to put some termination resistor somewhere is the line but i don't know where and how, also i don't know how much ohm should it be.