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.

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).

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

2022年8月24日 · Now, what to do with the MAX485 module's control lines? You can connect TXD to DI and RXD to RO, respectively. If your module simply uses the driver chip manufactured by Maxim, the control input RE has actually inverted logic. This means, the receiver is active, if the line is low. In contrast, the driver is active, if the line DE is high.

Max485 is a classic, probably has it, if not, look for Application Notes on RS-485, TI has good material ...

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

2020年2月27日 · I am attempting to control a Folinn VFD (Manual: Manual) with an Arduino Uno via a MAX485 module such as this. Pins for MAX485: DI > D8; DE & RE > D10; RO > D11; VFD settings: F00.01 set to 2; F00.06 set to 9; F13.00 set to 1; F13.01 set to 5 ; F13.02 set to 3; At this stage I am attempting a very simple code just to turn the VFD on:

I want to send data between Arduino Uno and Mega via MAX485. When I set the data Enable pin to HIGH on Mega (to transmit data) and set the same pin on UNO to LOW (to receive data) I can read data from Mega into Uno properly. However, when I want to do it vice versa (send data from uno to mega) can't get any data from Uno into Mega.

I purchased multiple Arduino Mini Pros and MAX485 TTL boards and now I'm trying to make them communicate together, but the problem is that I need that everyone can send and receive when needed. I mean, normally, the "Master" request something and then the right "Client" responds.