365buying IO Expansion Shield For Arduino (V5) -Xbee & RS485 & APC220 Support

Features

• Support RS485
• Support Xbee (Xbee pro)
• Support Bluetooth
• Support APC220
• Support SD card read/write

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Product Description

Technical Information

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Product Description
Sample CodeRS485 Transmit Dataint EN = 2; //RS485 has a enable/disable pin to transmit or receive data. Arduino Digital Pin 2 = Rx/Tx 'Enable'; High to Transmit, Low to Receivevoid setup() pinMode(EN, OUTPUT); Serial.begin(19200); void loop()// send data digitalWrite(EN, HIGH);//Enable data transmit Serial.print('A'); delay(1000);RS485 Receiving Dataint ledPin = 13;int EN = 2;int val;void setup() pinMode(ledPin, OUTPUT); pinMode(EN, OUTPUT); Serial.begin(19200);void loop() // receive data digitalWrite(EN, LOW);//Enable Receiving Data val = Serial.read(); if (-1 != val) if ('A' == val) digitalWrite(ledPin, HIGH); delay(500); digitalWrite(ledPin, LOW); delay(500); Compatibility ?Arduino UNO?Arduino Duemilanov?Arduino Mega 1280/2560