Communication between ADM2582 , Arduino and Raspberry

Using Arduino Networking, Protocols, and Devices
1

Hello,

I want to make two ways communications between Arduino (as slave) and Raspberry( Master) using ADM2582. Please can someone help me with the different codes.

thank you

2

which Arduino are you using?
have a look at arduino-rs485 tutorial

any particular reason to use RS485?
you can plug the Arduino into a RPi USB port where it creates a serial port , e.g. /dev/ttyUSB0

1 Like
3

Thank for your reply

I am using Arduino Due .

Also using ADM2582 because it is power isolated and allow communication in long distance.

4

what distance are you looking at?
have you a Raspberry Pi RS485 HAT?
what Arduino are you using?

5

I am using Arduino Due .

6

the DUE has hardware serial ports, e.g. Serial1 TXD pin 18 and RXD pin 19
on thje RPi are you using RS485 HAT or connecting a RS485 module to GPIO14 UART TX and GPIO15 UART RX or even a USB-RS485 dongle?

7

you could use a FTDI USB-RS485 or similar USB-RS485 module to connect to the Due Seria1 hardware port via a RS485 module to RPi USB
e.g. connecting a FTDI USB-RS485 to a RPi 3B+ it appears as serial port dev/ttyUSB0 - using putty terminal emulator to communicate
image

what programming language are you planning to use on the RPi?
I tend to use Java but there is C++, Python, etc

8

Thank you and sorry for late response

  • on the RPi i will use the ADM2582 module to GPIO14 and GPIO15
  • I want to use python on the RPi
9

remember to enable the serial using raspi-config
the UART on pins GPIO 14 and 15 should then appear as /dev/ttyS0
you can do a quick echo test by connecting pins 14 and 15 and running putty or a similar terminal emulator
characters entered on keyboard should echo to the display

by using "import serial" Python can access the UART

10

OK thank you