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Home Page: blog.protoneer.co.nz

License: GNU General Public License v2.0

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rs485-arduino-library's Introduction

RS485-Arduino-Library

Arduino Library for use with RS485 devices. It creates a software-serial on pins D2(RX) and D3(TX) that is connected to a RS485 chip.

Pin D4 is enabled when sending data over the data bus.

I used SN75176BP chip to transmit the data over CAT5 cable and Arduino UNO.

How to install it:

Down load the library from GitHub : https://github.com/Protoneer/RS485-Arduino-Library/archive/master.zip

Unzip the library and copy the main folder into the "Libraries" folder in the folder you installed your Arduino software. Eg. C:\arduino-1.0.3\libraries\

Rename the folder to "RS485" (This will stop the Arduino IDE from complaining about the long folder name)

Open up the Arduino IDE.

Click on the following menu : File -> Examples -> RS485 (or what ever you renamed the folder to) -> Sender or Receiver

Upload the sketch to your Arduino board.

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rs485-arduino-library's Issues

RX_PIN, TX_PIN and ENABLE_PIN must be defined first?

Hi, I have downloaded this library and did not found theese definitions.
Should I do it by myself?

define RX_PIN 2;

define TX_PIN 3;

define ENABLE_PIN 4;

And if so, may I change to any pin of arduino?
Thanks in advance.

Message format explain

I try the example it works, but I don´t understand the message format, I know that STX is the fisrt but then... please help to figure it out.

compile error on MEGA using standard SEND example

compile error on MEGA using standard SEND example:

/Applications/Arduino.app/Contents/Resources/Java/hardware/tools/avr/bin/../lib/gcc/avr/4.3.2/../../../../avr/lib/avr6/crtm2560.o: In function __vector_default': (.vectors+0x90): relocation truncated to fit: R_AVR_13_PCREL against symbol__vector_36' defined in .text.__vector_36 section in core.a(HardwareSerial.cpp.o)

HOW TO ASSIGN ADDRESS EACH MODULE?

Please add more explain how to use this, like addressing and make software serial dynamically, not editing library. thanks..

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