DFR0233 Datasheet DFR0233 | P7-P9

ConnectingDiagram

RS485 Sensor Node V1.0 connecting diagram

SampleCode

# The Sample code for test the data of Analogue_Test and SHT1X Module

# Editor : Lisper

# Date : 2013.12.9

# Ver : 1.3

# Product: Analogue_Test and SHT1X Module

# SKU : DFR0233

# Description:

# Read the Analog value and the data of humidity & temperature

# Hardwares:

1. Arduino UNO

2. IO Expansion Shield V5

3. Analogue_Test and SHT1X Module

# Interface: RS485

# Note: Connect the Analogue_Test and SHT1X Module with IO Expansion Shield

V5 through RS485

Set the address of the module in manual,range from 0x02 to 0x7F,take effect

after 30 seconds

#define uint unsigned int

#define uchar unsigned char

#define ulong unsigned long

#define addr 0x02 //set address of the device for 0x02

uchar cmd[50];

uchar receive_ACK[100];

int EN = 2;

#if defined(ARDUINO) && ARDUINO >= 100

#include "Arduino.h"

#define printByte(args) Serial.write(args)

#define printlnByte(args) Serial.write(args),Serial.println()

#else

#include "WProgram.h"

#define printByte(args) Serial.print(args,BYTE)

#define printlnByte(args) Serial.println(args,BYTE)

#endif

void setup() {

Serial.begin(9600);

pinMode(2, OUTPUT); // TTL -> RS485 chip driver pin

}

void loop() {

static ulong timepoint = 0;

if (millis() - timepoint > 1000) {

read_command();

timepoint = millis();

}

if (Serial.available() > 0) data_return();

// delay(1000);

}

/************************Send command to Analogue_Test and SHT1X Module******

*******************/

void read_command()

{

int i;

char sum_cmd = 0;

digitalWrite(EN, HIGH); // Turn the drvier pin to HIGH -> Turn on code tran

smitting mode for the RS485 interface

// Turn the driver pin to LOW -> Turn on reading mode for the RS485 interf

ace

delay(10);

cmd[0] = 0x55;

cmd[1] = 0xaa;

cmd[2] = addr;

cmd[3] = 0x00;

cmd[4] = 0x21;

for (i = 0; i < 5; i++) {

sum_cmd += cmd[i];

}

P1-P3 P4-P6 P7-P9 P10-P12 P13-P13

DFR0233

Mfr. #:

Buy DFR0233

Manufacturer:

DFRobot

Description:

Development Boards & Kits - AVR RS485 Sensor Node V1.0

Lifecycle:

New from this manufacturer.

Delivery:

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DFR0233