View source for KS0339 Keyestudio 8266 WIFI Module 2PCS


[[image:0339图片1.png|thumb|500px|right|keyestudio 8266 WIFI Module (2PCS)]]


==Product Overview==

===Overview:===
The package includes 2pcs of ESP8266 WIFI module. <br>
It is an ultra-low-power UART-WiFi pass-through module with industry-leading package size and ultra-low power technology. <br>
It is specially designed for mobile devices and IoT applications. It can connect users' physical devices to Wi-Fi wireless network for Internet or LAN communication, achieving the networking function.<br>

<br>
===Features:===
*1)Support wireless 802.11 b/g/n standard
*2)Support three working modes: STA/AP/STA+AP 
*3)Built-in TCP/IP protocol stack to support multiple TCP Client connections
*4)Support various Socket AT commands
*5)Support UART/GPIO data communication interface
*6)Support Smart Link intelligent networking function
*7)Support remote firmware upgrade (OTA)
*8)Built-in 32-bit MCU, able to double as an application processor
*9)Ultra low consumption, suitable for battery powered applications.
*10) 3.3V single power supply

<br>
===Basic Parameters:===
<br>[[Image:0339图片2.png|600px|frameless]]<br>
<br>[[Image:0339图片3.png|600px|frameless]]<br>

<br>

===Hardware Introduction:===
ESP8266 hardware has plentiful interfaces, and can support UART，IIC，PWM，GPIO，ADC and more, suited for mobile devices and IoT applications.
<br>
*'''Module pins diagram:'''
<br>[[Image:0339图片4.png|600px|frameless]]<br>

<br>
*'''Pins definition:'''
<br>[[Image:0339图片5.png|600px|frameless]]<br>

<br>

===Power Consumption:===
The following measured power consumption data is based on a 3.3V power supply at 25°ambient temperature.<br>
*1. All measurements are done at the antenna interface.<br>
*2. All transmit data is based on a 90% duty cycle and measured in continuous transmission mode. 
<br>[[Image:0339图片6.png|600px|frameless]]<br>

<br>

===Radio Frequency Indicator:===
The following data are measured at indoor temperature when the voltage is 3.3v.
<br>[[Image:0339图片7.png|600px|frameless]]<br>
<br>
<span style="color: red">'''Note: ''' 1. 72.2Mbps is measured in 802.11n mode，MCS=7，GI=200uS.<br>
2.The output power of up to +19.5dBm can be reached in 802.11b mode.

<br>

==Function Description==

===Main Function:===
ESP8266 can realize the main functions as follows: <br>
*'''Serial port passthrough:''' data transmission, good reliability of transfer; the maximum transmission rate is up to 460800bps.  <br>
*'''PWM regulation and control:''' light adjustment, RGB LED adjustment, motor speed control and more. <br>
*'''GPIO control:''' control the switches, relays and more. <br>

<br>
===Working Mode:===
ESP8266 module supports three working modes: STA/AP/STA+AP   <br>
*'''STA mode:''' The ESP8266 module can access to the Internet through a router, so the mobile phone or computer can remotely control the device through the Internet. <br>

*'''AP mode:''' The ESP8266 module acts as a hotspot to enable communication directly with the mobile phone or computer to achieve wireless control of the local area network (LAN). <br>

*'''STA+AP mode:''' The coexistence mode of the above two modes, that is, can achieve the seamless switching through the Internet control, more convenient for operation. <br>

<br>
===Applications:===
*1)Serial port CH340 to Wi-Fi;
*2)Industrial transparent transmission DTU;
*3)Wi-Fi remote monitoring/control;
*4)Toy field
*5)Color LED control;
*6)Integrated management of fire protection and security intelligence;
*7)Smart card terminals, wireless POS machines, Wi-Fi cameras, handheld devices, etc


<br>
==Example Use==
<br>
=== <span style="color:blue"> Use Uno R3 and ESP-01 as server </span>===
==== Tools ====
'''(1)'''Prepare the hardware components as follows: <br>
* Computer *1; 
* UNO R3 development board*1; 
* Esp-01 module *1;
* Square USB cable *1
* 2-cell 18650 lithium battery case with batteries *1

'''(2)'''Software: using [https://wiki.keyestudio.com/How_to_Download_Arduino_IDE  arduino IDE ]   <br>

<br>
==== Connection ====
Connect Uno R3 to ESP-01 module: 
<br>[[Image:0339图片.png|700px|frameless]]<br>

<br>

==== Test Code ====
<pre>
#include <SoftwareSerial.h>
SoftwareSerial mySerial(2, 3); // RX, TX
char OK[2]="";

//////////////////////////////////////////////////////////////////////////
void OK_config()
{  
 while(1)
  {
   OK[0]=mySerial.read();
   if(OK[0]=='O')
     {
      OK[1]=mySerial.read();
      if(OK[1]=='K')
        {
        break;
        }
     }
   delay(20);
   }  
}
//////////////////////////////////////////////////////////////////////////
void esp8266_config()
{
  Serial.println("AT+RST");   
  delay(1000);
  mySerial.println("AT+CWMODE_DEF=3");   //set the current Wi-Fi mode and save to Flash
  OK_config();
  mySerial.println("AT+CWSAP=\"KEYES_server\",\"123456789\",11,2");
  OK_config();
  mySerial.println("AT+CIPMUX=1");       //multiple connection   default port=333
  OK_config();
  mySerial.println("AT+CIPSERVER=1");    //build TCP Server
  OK_config();
  Serial.println("Initialize the server!");
  digitalWrite(13,HIGH);
  OK_config();                          //wait Client to send OK; access to Client
}
///////////////////////////////////////////////////////////////////////
void setup() 
{ 
  Serial.begin(115200);
  mySerial.begin(115200);
  pinMode(13,OUTPUT);
  digitalWrite(13,LOW);
  esp8266_config();
}
void loop()
{
 mySerial.println("AT+CIPSEND=0,9"); 
 delay(1000);
 mySerial.println("arduino"); 
 digitalWrite(13,LOW);
 delay(1000);
 digitalWrite(13,HIGH);
 delay(1000);
}
</pre>

<br>
<span style="color:red">'''Note:''' The code USES the AT instruction of esp-01 to realize the required functions. Please refer to the specific AT instructions mentioned below. </span>

<br>
==== Use and Result ==== 
* A、connect the UNO R3 main board to the computer via USB port with a square USB cable; then open the arduino IDE to upload the test code to UNO R3.
* B、Unplug the USB cable; connect the esp-01 module to UNO R3 main board using jumper wires according to the connection diagram.
* C、supply the power to UNO R3 main board via black DC power jack with 2-cell 18650 batteries; wait for a few seconds, LED labeled L on the UNO R3 will normally turn on. Otherwise, pull out the power cable and repower again.

<br>
=== <span style="color:blue"> Set ESP-01 as Client and connect server </span>===
==== Tools ====
'''(1)'''Prepare the hardware components as follows:<br>
* Computer *1
* TTL USB to serial port module *1
* Esp-01 module *1
* Mini USB cable *1

'''(2)'''Software: using [https://drive.google.com/open?id=1UAYAhdqr2iXO49ibkLyV4c2Aieteihs6  esp8266 debugging tool] or [https://drive.google.com/open?id=1W6XbaJoVHgOlnexGbT5A5_P19jWlob8j  USR-TCP232-Test debug tool]   <br>

<br>

==== Connection ==== 
Connect ESP-01 module to TTL USB-to-serial port module:
<br>[[Image:0339图片-2.png|700px|frameless]]<br>

<br>

==== Detailed debugging ====
* A、Follow the connection diagram to connect ESP-01 module to TTL USB-to-serial port module;<br>
* B、Connect the TTL USB-to-serial port module to the computer using a mini USB cable.<br>
<span style="color:red"> '''SPECIAL NOTE:''' need to program the corresponding drive to the TTL USB-to-serial port module before use.</span><br>
* C、Open the [https://drive.google.com/open?id=1W6XbaJoVHgOlnexGbT5A5_P19jWlob8j  USR-TCP232-Test debug tool], click [[Image:0339-图片10.png|600px|frameless]] to select the language, select the proper USB port and set the baud rate to 115200; set the Recv Options[[Image:0339-图片11.png|600px|frameless]] , open the serial port. As shown below.
[[Image:0339-图片1.png|600px|frameless]]<br>
[[Image:0339-图片2.png|600px|frameless]]<br>

* D、'''AT+CWMODE=3'''  set the ESP-01 module as mode 3:
[[Image:0339-图片3.png|600px|frameless]]<br>

<span style="color:red">  Special attention:  </span><br>
<span style="color:red"> '''1 :'''  </span> To fill in the instruction, a newline character should be added after the instruction is typed, as shown in the figure above. All subsequent instructions should be operated in this way.<br>
<span style="color:red"> '''2 :'''  </span>  To send instructions to esp-01.<br>
<span style="color:red"> '''3 :'''  </span>  The information returned after the instruction is received by esp-01.<br>
 
* E、AT+CWJAP="KEYES_server","123456789" connect to server ESP-01 WIFI:
[[Image:0339-图片4.png|600px|frameless]]<br>

* F、AT+CIPAP_CUR="192.168.1.20","192.168.1.20" modify the IP of client ESP-01 AP; modifying the IP of AP is to avoid the conflict between client AP’s IP and server AP’s IP. As figure shown below.
[[Image:0339-图片5.png|600px|frameless]]<br>

* G、AT+CIPSTART="TCP","192.168.4.1",333 connect to server ESP-01, as shown below.
[[Image:0339-图片6.png|600px|frameless]]<br>

* H、Send the AT+CIPMODE=1 command to set the client ESP-01 as pass-through mode. As shown below. 
[[Image:0339-图片7.png|600px|frameless]]<br>

* I、Send the AT+CIPSEND command means the client ESP-01 send the data instruction to the server ESP-01. As shown below.
[[Image:0339-图片8.png|600px|frameless]]<br>

* J、client ESP-01 sends the “OK” character to server ESP-01; trigger the server ESP-01 to send the “arduino” character to client ESP-01 all the time. As figure shown below.
[[Image:0339-图片9.png|600px|frameless]]<br>

* K、At this moment, the LED labeled L on the UNO R3 main board connected to server ESP-01 will turn on normally, which illustrates it always send the data to client ESP-01.


<br>

==Basic AT Commands==

===Test the AT===

*'''Syntax Rules:'''
[[File:0339图片8.png|700px|frameless|thumb]]<br>

<br>
===WiFi Function AT Command===
==== <span style="color: brown"> Select WiFi Application Mode: AT+CWMODE====
*'''Syntax Rules:'''
[[File:0339图片9.png|700px|frameless|thumb]]<br>

<br>
*'''Parameter Definition:'''
[[File:0339图片10.png|700px|frameless|thumb]]<br>

<br>

==== <span style="color: brown"> List out Access Point: AT+CWLAP====
*'''Syntax Rules:'''
[[File:0339图片11.png|700px|frameless|thumb]]<br>

<br>
*'''Parameter Definition:'''
[[File:0339图片12.png|700px|frameless|thumb]]<br>

<br>
====  <span style="color: brown"> Add Access Point: AT+CWJAP====
*'''Syntax Rules:'''
[[File:0339图片13.png|700px|frameless|thumb]]<br>

<br>
*'''Parameter Definition:'''
[[File:0339图片14.png|700px|frameless|thumb]]<br>

<br>
====  <span style="color: brown"> Exit Access Point: AT+CWQAP====
*'''Syntax Rules:'''
[[File:3-2-4.png|700px|frameless|thumb]]<br>

<br>

====  <span style="color: brown"> Set the AP Mode: AT+CWSAP====
*'''Syntax Rules:'''
[[File:3-2-5.png|700px|frameless|thumb]]<br>

<br>
*'''Parameter Definition:'''
[[File:0339图片17.png|700px|frameless|thumb]]<br>


<br>

===TCPIP AT Command===
==== <span style="color: brown"> Build TCP/UDP Connection: AT+CIPSTART====
*'''Syntax Rules:'''
[[File:0339图片28.png|700px|frameless|thumb]]<br>

<br>
*'''Parameter Definition:'''
[[File:0339图片29.png|700px|frameless|thumb]]<br>

<br>
==== <span style="color: brown"> Get TCP/UDP Connection Status: AT+CIPSTATUS ====
*'''Syntax Rules:'''
[[File:0339图片30.png|700px|frameless|thumb]]<br>

<br>
*'''Parameter Definition:'''
[[File:0339图片31.png|700px|frameless|thumb]]<br>

<br>
==== <span style="color: brown"> Start Multilink: AT+CIPMUX ====
*'''Syntax Rules:'''
[[File:3-3-3.png|700px|frameless|thumb]]<br>

<br>
*'''Parameter Definition:'''
[[File:0339图片33.png|700px|frameless|thumb]]<br>

<br>

==== <span style="color: brown"> Send Data: AT+CIPSEND====
*'''Syntax Rules:'''
[[File:0339图片34.png|800px|frameless|thumb]]<br>

<br>
*'''Parameter Definition:'''
[[File:0339图片35.png|700px|frameless|thumb]]<br>

<br>

==== <span style="color: brown"> Close TCP/UDP Connection: AT+CIPCLOSE====
*'''Syntax Rules:'''
[[File:0339图片36.png|700px|frameless|thumb]]<br>

<br>
*'''Parameter Definition:'''
[[File:0339图片37.png|700px|frameless|thumb]]<br>

<br>
==== <span style="color: brown"> Get Local IP Address: AT+CIFSR====
*'''Syntax Rules:'''
[[File:0339图片38.png|700px|frameless|thumb]]<br>

<br>
*'''Parameter Definition:'''
[[File:0339图片39.png|700px|frameless|thumb]]<br>

<br>
==== <span style="color: brown"> Select TCPIP Mode: AT+CIPMODE====
*'''Syntax Rules:'''
[[File:0339图片40.png|700px|frameless|thumb]]<br>

<br>
*'''Parameter Definition:'''
[[File:0339图片41.png|700px|frameless|thumb]]<br>

<br>
==== <span style="color: brown"> Set the Sever Timeout: AT+CIPSTO====
*'''Syntax Rules:'''
[[File:0339图片42.png|700px|frameless|thumb]]<br>

<br>
*'''Parameter Definition:'''
[[File:0339图片43.png|700px|frameless|thumb]]<br>

<br>
==== <span style="color: brown"> Set the Baud Rate: AT+CIOBAUD====
*'''Syntax Rules:'''
[[File:0339图片44.png|700px|frameless|thumb]]<br>

<br>
*'''Parameter Definition:'''
[[File:0339图片45.png|700px|frameless|thumb]]<br>

<br>
==AT Command Settings==
When setting the AT command, you should use a USB to Serial module, that is FT232 module, and a WIFI to serial shield. <br>
Connect well and then connect them to your computer using mini USB cable.
<br>[[File:0339图片46.png|700px|frameless|thumb]]<br>
<br>
Connected successfully, open the [https://drive.google.com/open?id=1UAYAhdqr2iXO49ibkLyV4c2Aieteihs6  ESP8266 debugging tool], set the baud rate to 115200, click to open the Serial Port, and click Test the AT.<br> 
You should see the data received window will print out '''AT OK'''. To set other AT commands, the method is similar.<br>
<br>
You can download the ESP8266 debugging tool from the link below:<br>
https://drive.google.com/open?id=1UAYAhdqr2iXO49ibkLyV4c2Aieteihs6

<br>[[File:0339图片47.png|700px|frameless|thumb]]<br>


<br>
==Firmware Programming==
When setting the AT command, you should use a USB to Serial module, that is FT232 module, and a WIFI to serial shield. <br>
Connect well and then connect them to your computer using mini USB cable.
<br>[[File:0339图片46.png|700px|frameless|thumb]]<br>
<br>
Then open flash_download_tools_v3.6.5software, click to open [[File:0339图片48-1.png|700px|frameless|thumb]]<br>
<br>
You can download the flash download tools v3.6.5 from the link: <br>
https://drive.google.com/open?id=1Zjg-lg7ySsmN4C3A0Oz9UJCdXqtkdf_R

<br>[[File:0339图片48.png|700px|frameless|thumb]]<br>
<br>
Wait for a minute, pop up the below interface, click the ESP8266 Download Tool. 
<br>[[File:0339图片49.png|700px|frameless|thumb]]<br>
<br>
Pop up the interface to set the firmware burning. This is the address of firmware burning. [[File:0339图片50.png|700px|frameless|thumb]]<br>  
<br>[[File:0339图片51.png|500px|frameless|thumb]]<br>
<br>
Hold the '''FLASH''' button on the shield, and Tap '''START''' button, then press '''RST''' button on the shield, release the '''FLASH''' button. The module will enter the download mode. Shown below.   
<br>[[File:0339图片52.png|500px|frameless|thumb]][[File:0339图片53.png|500px|frameless|thumb]]<br>
<br>
Firmware download completed, can enter the corresponding software to set the AT command.


<br>
==Resources Download==

'''Download all the tools here:''' <br>
https://fs.keyestudio.com/KS0339




<br>

==Buy from ==
*[https://www.keyestudio.com/2pcs-esp8266-esp-01-serial-wireless-wifi-transceiver-module-with-keyestudio-packing-box-for-arduino-p0358-p0358.html   '''Official Website''']

*[https://www.aliexpress.com/store/product/2PCS-ESP8266-Esp-01-Serial-Wireless-Wifi-Transceiver-Module-With-Keyestudio-Packing-Box-For-Arduino/1452162_32887527571.html?spm=2114.12010615.8148356.11.d1b63576mwSGrD  Shop on aliexpress ]

*[https://www.amazon.com/KEYESTUDIO-Esp8266-Module-Arduino-Projects/dp/B07DWNLSMG?ref_=w_bl_hsx_s_pc_web_13497667011   Shop on amazon]



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