ESP8266 Wifi Module

WIFI 모듈

ENC28J60 IC가 내장된 무선 통신 모듈

AVR,PIC 등의 MCU, Arduino 등 시리얼 통신이 가능한 모든 제품에서 사용가능

 

특징

802.11 b / g / n

Wi-Fi Direct (P2P), soft-AP

Built-in TCP / IP protocol stack

Built-in TR switch, balun, LNA, power amplifier and matching network

Built-in PLL, voltage regulator and power management components

802.11b mode + 19.5dBm output power

Built-in temperature sensor

Support antenna diversity

off leakage current is less than 10uA

Built-in low-power 32-bit CPU: can double as an application processor

SDIO 2.0, SPI, UART

STBC, 1×1 MIMO, 2×1 MIMO

A-MPDU, A-MSDU aggregation and the 0.4 Within wake

2ms, connect and transfer data packets

standby power consumption of less than 1.0mW (DTIM3)

AT COMMAND

모든 명령에는 공백(스페이스) 없이 다 붙여 써야 합니다.

Commands	Description	Type	Set/Execute	Parameters and Examples
AT	general test	basic	–	–
AT+RST	restart the module	basic	–	–
AT+GMR	check firmware version	basic	–	–
AT+CIOBAUD	baud rate	basic	–	AT+CIOBAUD? AT+CIOBAUD=9600 AT+CIOBAUD=115200
AT+CWMODE	wifi mode	wifi	AT+CWMODE=<mode>	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 >	ssid = ssid, pwd = wifi password
AT+CWLAP	list the AP	wifi	AT+CWLAP
AT+CWQAP	quit the AP	wifi	AT+CWQAP
AT+ CWSAP	set the parameters of AP	wifi	AT+ CWSAP= <ssid>,<pwd>,<chl>, <ecn>	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>	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>	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>	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+CIFSR	Get IP address	TCP/IP	AT+CIFSR
AT+ CIPMUX	set mutiple connection	TCP/IP	AT+ CIPMUX=<mode>	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?
+IPD	received data			For Single Connection mode(CIPMUX=0): + IPD, <len>: For Multi Connection mode(CIPMUX=1): + IPD, <id>, <len>: <data>

핀 맵

8핀이며 보드에 표기되어 있습니다.

좌측 핀번호	핀명	기능	우측 핀번호	핀명	기능
1	UTXD	TXD(3.3V)	2	GND	Ground
3	CH_EN	ENABLE	4	GPIO2	GPIO2
5	RST	RESET	6	GPIO0	GPIO0
7	VCC	3.3V	8	URXD	RXD(3.3V)

WAT-Arduino128에 연결

WAT-Arduino128 와 ESP8266 Wifi Module 간의 연결 예입니다.

좌측 핀번호	WAT-Arduino128 핀 번호	우측 핀번호	WAT-Arduino128 핀 번호
1	PD2(RXD)	2	GND
3	3.3V	4	No Connect
5	PD0	6	No Connect
7	3.3V	8	PD3(TXD)

예제

예제명	URL
WIFI로 TCP/IP 로 서버 시간 가져오기	https://docs.whiteat.com/?p=675
ESP8266 Mode 변경	https://docs.whiteat.com/?p=2617
WIFI로 컴퓨터에서 LCD제어	https://docs.whiteat.com/?p=808

 

제품 구매

https://kit128.com/goods/view?no=63 에서 구매하실 수 있습니다.