Elecrow ESPduino UNO+ESP8266 Wifi Board

Description

The Elecrow ESPduino combines a Arduino UNO with a serial WiFi and can be apply on lots of project of IOT, such as Smart Home, Smart robot, Security system. The same size with more powerful function, this two in one board will give you surprise!

Same as the Arduino UNO, the ESPduino also has 14 digital input/output pins (of which 6 can be used as PWM outputs), 6 analog inputs, a 16 MHz ceramic resonator, a USB connection, a power jack, an ICSP header, a reset button, and of course a Mini USB cable, simply connect it to a computer with a USB cable or power it with a AC-to-DC adapter or battery to get started.

Model: ACM82664A

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Summary

Microcontroller	ATmega328
Operating Voltage	5v
Input Voltage (recommended)	7-12V
Input Voltage (limits)	6-15V
Digital I/O Pins	14 (of which 6PINs provide PWM output)
Analog Input Pins	8
DC Current per I/O Pin	40mA
DC Current for 3.3V Pin	50 mA
Flash Memory	32 KB (ATmega328) of which 0.5 KB used by bootloader
SRAM	2 KB (ATmega328)
EEPROM	1 KB (ATmega328)
Clock Speed	16 MHz

Features

• Connection Mode:U(UART)
• One high speed serial port
• Working voltage:5v
• 802.11 b/g/n protocol
• Wi-Fi Direct (P2P), soft-AP
• Integrated TCP/IP protocol stack
• Integrated TR switch, balun, LNA, power amplifier and matching network
• Integrated PLL, regulators, and power management units
• +19.5dBm output power in 802.11b mode
• Dimensions(mm):70.0(L)x55.0(W)x11.8(H)

Interface Function

AT Commands

Format

• Baud rate at 115200
• x is the commands

(Click the picture to zoom in)

Set	Inquiry	Test	Execute
AT+<x>=<…>	AT+<x>?	AT+<x>=?	AT+<x>
AT+CWMODE=<mode>	AT+CWMODE?	AT+CWMODE=?	-
Set the network mode	Check current mode	Return which modes supported	-

Commands

• carefully there are must be no any spaces between the " and IP address or port

Commands	Description	Type	Set/Execute	Inquiry	test	Parameters and Examples
AT	general test	basic	-	-	-	-
AT+RST	restart the module	basic	-	-	-	-
AT+GMR	check firmware version	basic	-	-	-	-
AT+CWMODE	wifi mode	wifi	AT+CWMODE=<mode>	AT+CWMODE?	AT+CWMODE=?	1= Sta, 2= AP, 3=both, Sta is the default mode of router, AP is a normal mode for devices
AT+CWJAP	join the AP	wifi	AT+ CWJAP =<ssid>,< pwd >	AT+ CWJAP?	-	ssid = ssid, pwd = wifi password
AT+CWLAP	list the AP	wifi	AT+CWLAP
AT+CWQAP	quit the AP	wifi	AT+CWQAP	-	AT+CWQAP=?
AT+ CWSAP	set the parameters of AP	wifi	AT+ CWSAP= <ssid>,<pwd>,<chl>, <ecn>	AT+ CWSAP?		ssid, pwd, chl = channel, ecn = encryption; eg. Connect to your router: AT+CWJAP="www.electrodragon.com","helloworld"; and check if connected: AT+CWJAP?
AT+CWLIF	check join devices' IP	wifi	AT+CWLIF	-	-
AT+ CIPSTATUS	get the connection status	TCP/IP	AT+ CIPSTATUS			<id>,<type>,<addr>,<port>,<tetype>= client or server mode
AT+CIPSTART	set up TCP or UDP connection	TCP/IP	1)single connection (+CIPMUX=0) AT+CIPSTART= <type>,<addr>,<port>; 2) multiple connection (+CIPMUX=1) AT+CIPSTART= <id><type>,<addr>, <port>	-	AT+CIPSTART=?	id = 0-4, type = TCP/UDP, addr = IP address, port= port; eg. Connect to another TCP server, set multiple connection first: AT+CIPMUX=1; connect: AT+CIPSTART=4,"TCP","X1.X2.X3.X4",9999
AT+CIPMODE	set data transmission mode	TCP/IP	AT+CIPMODE=<mode>	AT+CIPSEND?		0 not data mode, 1 data mode; return "Link is builded"
AT+CIPSEND	send data	TCP/IP	1)single connection(+CIPMUX=0) AT+CIPSEND=<length>; 2) multiple connection (+CIPMUX=1) AT+CIPSEND= <id>,<length>		AT+CIPSEND=?	eg. send data: AT+CIPSEND=4,15 and then enter the data.
AT+CIPCLOSE	close TCP or UDP connection	TCP/IP	AT+CIPCLOSE=<id> or AT+CIPCLOSE		AT+CIPCLOSE=?
AT+CIFSR	Get IP address	TCP/IP	AT+CIFSR		AT+ CIFSR=?
AT+ CIPMUX	set mutiple connection	TCP/IP	AT+ CIPMUX=<mode>	AT+ CIPMUX?		0 for single connection 1 for multiple connection
AT+ CIPSERVER	set as server	TCP/IP	AT+ CIPSERVER= <mode>[,<port> ]			mode 0 to close server mode, mode 1 to open; port = port; eg. turn on as a TCP server: AT+CIPSERVER=1,8888, check the self server IP address: AT+CIFSR=?
AT+ CIPSTO	Set the server timeout	AT+CIPSTO=<time>	AT+CIPSTO?		<time>0~28800 in second
+IPD	received data					For Single Connection mode(CIPMUX=0): + IPD, <len>: For Multi Connection mode(CIPMUX=1): + IPD, <id>, <len>: <data>

Usage

Change the baud rate

The default baud rate of ESP8266-12E was 115200 bps, if communication with UNO software serial, it may make some mistake, we need to change it low than 19200bps.
1.upload a blink code to the ESPduino, as below:

2.we use the hardware serial[FT232] sent the AT Command to ESP8266.Connect ESP_RX TO TX and ESP_TX TO RX. Show as below:

3.Open a Serial debug tool, i use the SSCOM3.2. As below:

4.Change the baud of the SSCOM3.2, and sent a AT to the ESP8266, test it whether change the baud rate succeed.

Use the ESPduino as a Webserver

1.Hardware Connection.
Connected the ESP8266 to the software serial( D7 and D8) by the jumper cap.As below:
By the way, before you do that,you need to change the ESP8266 baud rate to 9600.

2.Connect the board to PC using USB cable.

3:Download the code: Webserver_for_ESP8266 or copy it to you new skecth.

#include <SoftwareSerial.h>
 
#define DEBUG true
 
SoftwareSerial esp8266(7,8); // make RX Arduino line is pin 7, make TX Arduino line is pin 8.
                             // This means that you need to connect the TX line from the esp to the Arduino's pin 7
                             // and the RX line from the esp to the Arduino's pin 8
void setup()
{
  Serial.begin(9600);
  esp8266.begin(9600); // your esp's baud rate might be different
  sendData("AT+RST\r\n",2000,DEBUG); // reset module
  sendData("AT+CWMODE=2\r\n",1000,DEBUG); // configure as access point
  sendData("AT+CIFSR\r\n",1000,DEBUG); // get ip address
  sendData("AT+CIPMUX=1\r\n",1000,DEBUG); // configure for multiple connections
  sendData("AT+CIPSERVER=1,80\r\n",1000,DEBUG); // turn on server on port 80
}
 
void loop()
{
  if(esp8266.available()) // check if the esp is sending a message 
  {
    /*
    while(esp8266.available())
    {
      // The esp has data so display its output to the serial window 
      char c = esp8266.read(); // read the next character.
      Serial.write(c);
    } */
    
    if(esp8266.find("+IPD,"))
    {
     delay(1000);
 
     int connectionId = esp8266.read()-48; // subtract 48 because the read() function returns 
                                           // the ASCII decimal value and 0 (the first decimal number) starts at 48
     
     String webpage = "<h1>Hello World!</h1>";
     String cipSend = "AT+CIPSEND=";
     cipSend += connectionId;
     cipSend += ",";
     cipSend +=webpage.length();
     cipSend +="\r\n";
     
     sendData(cipSend,1000,DEBUG);
     sendData(webpage,1000,DEBUG);
 
     String closeCommand = "AT+CIPCLOSE="; 
     closeCommand+=5; // append connection id
     closeCommand+="\r\n";    
     sendData(closeCommand,3000,DEBUG);
    }
  }
}
 
 
String sendData(String command, const int timeout, boolean debug)
{
    String response = "";
    
    esp8266.print(command); // send the read character to the esp8266
    
    long int time = millis();
    
    while( (time+timeout) > millis())
    {
      while(esp8266.available())
      {      
        // The esp has data so display its output to the serial window 
        char c = esp8266.read(); // read the next character.
        response+=c;
      }  
    }
    
    if(debug)
    {
      Serial.print(response);
    }    
    return response;
}
 

4.Upload the code and Open the serial monitor.You can see some configuration information.

5.PC connect to the wifi of ESP8266.

6.Then you can visit the Webserver of the ESP8266.

Resources

• Elecrow ESPduino v1.0 eagle files

Support

If you have any problem about how to use it, you can connect to us at the bottom-right of bazzer or contact to techsupport@elecrow.com to get technology support.