Check out the detailed tutorial on RS-485 MODBUS Serial Communication with Arduino as Master:
For Arduino as Slave tutorial, visit this link:
A Brief About RS-485 Serial Communication:
RS-485 is an asynchronous serial communication protocol which doesn’t not require clock. It uses a technique called differential signal to transfer binary data from one device to another. It provides a Half-Duplex communication when using two wires and Full-Duplex requires 4 fours wires.
Connecting RS-485 with Arduino:
RS-485 Module can be connected to any microcontroller having serial port. For using RS-485 module with microcontrollers, a module called 5V MAX485 TTL to RS485 which is based on Maxim MAX485 IC is needed as it allows serial communication over long distance of 1200 meters. It is bidirectional and half duplex and has data transfer rate of 2.5 Mbps. This module requires a voltage of 5V.
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Nguồn: https://rmacct.org/
Xem thêm bài viết khác: https://rmacct.org/cong-nghe/
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can you interface Arduino uno to max485 ttl rs485 to usb to rs485 to a sensor specifically to 485 soil npk sensor.?
Good work…very helpful to me….Tha nk you
i have a temperature controller with RS 485 out put , i want to send the signal over to wifi
RS-485 compatible arduino Modbus
https://norvi.lk/
can you send data from slave to master??
very good video how to read float value 2.5 from pc slave from arduino master
Why is display so slow when pressing S1 and S2 buttons? Is it the delay loop in arduino program?
whats with the fast talk if you got such heavy accent? No hate tho
Can you tell me how to control vfd using Arduino or with 8051 microcontroller??
Muszę się temu przyjrzeć bliżej w najbliższym czasie może da się bezpiecznie wykorzystać jako MPG albo obsługa magazynu narzędzi do LinuxCNC
I try to upload the code to arduino, but some functions are not defined (for example begin, pretransmision and posttransmission). Does anyone have a solution to this?
What are the applications of this project Sir ?
It's not working for me..Any suggestions?
Helpful video. Very good
Nice demonstrate sir.. I have a doubt, how to communicate two HMIs with two ardiuno board, with HC-12 Wi-Fi module at both TX and RX side. And one more thing is I did all the connection and everything, I failed to write ardiuno code for this task…