njustcjj / SENZ020-ESP8266-WiFi-Module

SENZ020-ESP8266-ESP-01S-WiFi-Module

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Introduction

SENZ020 ESP8266 ESP-01S Moudle has a powerful on-chip processing and storage capacity, built-in 32-bit processor, built-in Lwip protocol stack. And SENZ020 is a Serial-to-WIFI module applicable to a variety of 3.3V single-chip system. It can be used for Arduino, wireless data transfer, remote control. It supports AP+STA mode co-exist. And you could configure various parameters via AT commands.

Specification

• Working voltage: +3.3V
• Wireless standard: IEEE802.11b/g/n
• Frequency: 2.4 GHz
• Working mode: STA/ soft-AP/ soft-AP + STA
• Support WEP/WPA-PSK/WPA2-PSK encryption
• Support UART, TTL, GPIO interface
• Built-in Lwip protocol stack
• Built-in low-power 32-bit CPU: can work as an application processor
• Size：24.7 x 14.4mm

Tutorial

Pin Definition

Sensor pin	Ardunio Pin	Function Description
VCC	+3.6~6V	Power shouldn't be higher than 7V
GND	GND
RXD	TX	Receive data
TXD	RX	Transmit date
RST	-	Reset
EN	+3.3V	Enable
GPIO0
GPIO2

Connecting Diagram

Sample Code

Sample1:

To develop with serial AT commands.
Download description for AT_Command_Doc

/*
RXD <-> Pin3, TXD <-> Pin2;
Built the Serial by Arduino's Pin 2 & Pin 3, debug  serial and test the TCP/IP with other software.
*/

#include <SoftwareSerial.h>

SoftwareSerial mySerial(3, 2); // RX TX

void setup() {
    Serial.begin (115200);
    while (!Serial) {;}
    Serial.println("hardware serial!");
    mySerial.begin(115200);
    mySerial.println("software serial!");
}

void loop() {

    if ( mySerial. available()) {
       Serial.write(mySerial.read());
  }

    if (Serial.available()) {
        mySerial.write(Serial.read());
    }
}

---

Sample2:

To develop with Arduino board.
Download and add the library to Arduino IDE uartWIFI.h

#include "uartWIFI.h"
#define SSID "xxxxxxx"        //wifi name
#define PASSWORD "xxxxxxx"        //wifi password
#define LED 13 //状态指示灯

WIFI wifi;

/*
 * @Desc initialization
 */
void setup() {
  pinMode(LED,OUTPUT);
  initESP8266();
  DebugSerial.println("Init end");
}

void loop() {
  // put your main code here, to run repeatedly:

}

/*
 *
 * Step1：Set serial port
 * Step2: set ESP8266
 *    1) AT+RST restart the mode
 *    2) AT+CWMODE=1 and AT+RST  Set STA mode and restart to vaildate 
 *    3) AT+CWJAP="SSID","PASSWORD"  set WiFi name and password
 *    4) AT+CIPMUX=0    0 single route connect mode, 1 multi route connec mode
 *    5) AT+CIFSR to get IP and MAC address
 *   
 */
void initESP8266(){
  wifi.begin(9600,9600);
  bool b = wifi.Initialize(STA, SSID, PASSWORD);
  if(!b){
    DebugSerial.println("Init error");
  }

  wifi.confMux(0);
  delay(100);
  String ipstring = wifi.showIP();
  DebugSerial.println(ipstring);        //show the ip address of module
  DebugSerial.println("Server is set up");
}

void(* resetFunc) (void) = 0; //Reset command

void esp8266Error(String error)
{
    DebugSerial.print("ERROR:");
    DebugSerial.println(error);
    while (1)
    {
        digitalWrite(LED, HIGH);
        delay(500);
        digitalWrite(LED, LOW);
        delay(500);
        resetFunc();
    }
}

/*
 * find char t from tagert char s
 */
unsigned char findString(char *s, char *t, unsigned int Length_s, unsigned int Length_t)
{   char x = 0; char *p; p = t;
    int i = 0, j = 0;
    for (; i < Length_s; s++, i++)
    {
        while (*t == *s)
        {   s++; t++; i++; j++;
            if (j >= Length_t) return 1;
        }
        s -= j;
        t = p; j = 0;
    }
    return NULL;
}

Purchasing SENZ020-ESP8266-ESP-01S-WiFi-Module.