DFR0259

DFR0259 Datasheet

Arduino RS485 Shield SKU DFR0259

Part	Datasheet
DFR0259	DFR0259 (pdf)

PDF Datasheet Preview
Arduino RS485 Shield SKU DFR0259 Contents • 1 Introduction • 2 Specification • 3 Pin Definition • 4 Simple Application Use Setups Sample Code Introduction This is a RS485 shield,especially designed for the Arduino controller board. It can easily convert the UART to the RS485. This shield integrates a standard RS485 port ,a mini RS485 port PH2.0 interface , RS485 headers, and provides the welding areas, so it's convenient for your DIY design.One key changes automatic and manual transmission mode, which expand the scope of application. Specification • Power module +5.0V • Module size 55mmx53mm • 16 digital IO port including a I2C interface • 6 analog IO port and power • Operation/programming mode switch • Automatic/manual transceiver mode switch When in manual transceiver mode, the enable end is the 2nd digital IO port • Transceiver indicating LED • Standard RS485 interface, mini RS485 interface PH2.0 and RS485 pins • Weldable area • Reset button Pin Definition Operation and programming mode switch To OFF, you can download the program for the Arduino controller. To ON , the shield will convert the UART to the RS485. Transceiver mode switch To AUTO, the shield is automatically sending and receiving data, so you do not care about operation timing To MANU, the shield is in manual transceiver status, and the enable end is the 2nd digital IO port. Enabling high-side power Ping to sending state while the low level of the receiving state. Simple Application Use Setups When the RS485 shield is installed on your Arduino controller, and then you will wire the RS485 shiled with USB-RS485 converter to connect terminals, namely A pair of A, B on B, GND on GND, then download the following sample code Note Downloading code, run / program mode switch must hit the OFF position, otherwise it will lead to the download fails. When downloaded,it is complete to ON, and the shield to normal use . Open serial monitor of Arduino IDE, find USB-RS485 converter corresponding serial port, send characters "V", you can see the LED status may change, and reply "OK". Sample Code Automatic Transmission Mode /* # This sample codes is for testing the RS485 shiled automatic transmission mo de . # Editor YouYou # Date # Ver # Product RS485 shield # SKU DFR0259 */ int led = 13 void setup Serial.begin 9600 pinMode led,OUTPUT void loop int temp if Serial.available temp=Serial.read digitalWrite led,1-digitalRead led ; Serial.println "OK" ; Manual Transmission Mode # This sample codes is for testing the RS485 shiled manual transmission mode # EN=2; # Editor YouYou # Date : # Ver : # Product RS485 shield # SKU DFR0259 int led = 13; int EN = 2 //Definition RS485 shield enable terminal the 2nd digital IO po rts , //high for the sending state, the low level of receiving state void setup Serial.begin 9600 ; pinMode led,OUTPUT ; pinMode EN,OUTPUT ; void loop int temp; digitalWrite EN,LOW //Enable low, RS485 shield waiting to receive data if Serial.available temp=Serial.read ;

PDF Datasheet Preview

Arduino RS485 Shield SKU DFR0259

Contents
• 1 Introduction
• 2 Specification
• 3 Pin Definition
• 4 Simple Application

Use Setups Sample Code

Introduction

This is a RS485 shield,especially designed for the Arduino controller board. It can easily convert the UART to the RS485. This shield integrates a standard RS485 port ,a mini RS485 port PH2.0 interface , RS485 headers, and provides the welding areas, so it's convenient for your DIY design.One key changes automatic and manual transmission mode, which expand the scope of application.

Specification
• Power module +5.0V
• Module size 55mmx53mm
• 16 digital IO port including a I2C interface
• 6 analog IO port and power
• Operation/programming mode switch
• Automatic/manual transceiver mode switch When in manual transceiver mode, the enable end is
the 2nd digital IO port
• Transceiver indicating LED
• Standard RS485 interface, mini RS485 interface PH2.0 and RS485 pins
• Weldable area
• Reset button

Pin Definition

Operation and programming mode switch To OFF, you can download the program for the Arduino controller. To ON , the shield will convert the UART to the RS485. Transceiver mode switch To AUTO, the shield is automatically sending and receiving data, so you do not care about operation timing To MANU, the shield is in manual transceiver status, and the enable end is the 2nd digital IO port. Enabling high-side power Ping to sending state while the low level of the receiving state.

Simple Application

Use Setups

When the RS485 shield is installed on your Arduino controller, and then you will wire the RS485 shiled with USB-RS485 converter to connect terminals, namely A pair of A, B on B, GND on GND, then download the following sample code Note Downloading code, run / program mode switch must hit the OFF position, otherwise it will lead to the download fails. When downloaded,it is complete to ON, and the shield to normal use . Open serial monitor of Arduino IDE, find USB-RS485 converter corresponding serial port, send characters "V", you can see the LED status may change, and reply "OK".

Sample Code

Automatic Transmission Mode
/* # This sample codes is for testing the RS485 shiled automatic transmission mo de . # Editor YouYou # Date # Ver # Product RS485 shield # SKU DFR0259 */ int led = 13 void setup

Serial.begin 9600 pinMode led,OUTPUT void loop int temp if Serial.available
temp=Serial.read digitalWrite led,1-digitalRead led ;

Serial.println "OK" ;

Manual Transmission Mode
# This sample codes is for testing the RS485 shiled manual transmission mode
# EN=2;
# Editor YouYou
# Date :
# Ver :
# Product RS485 shield
# SKU DFR0259
int led = 13;
int EN = 2 //Definition RS485 shield enable terminal the 2nd digital IO po rts ,
//high for the sending state, the low level of receiving state
void setup

Serial.begin 9600 ;
pinMode led,OUTPUT ;
pinMode EN,OUTPUT ;
void loop
int temp;
digitalWrite EN,LOW //Enable low, RS485 shield waiting to receive data
if Serial.available
temp=Serial.read ;

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Datasheet ID: DFR0259 508692