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±â´É¼º¸ðµâ(MCU, Utility) > Åë½Å,WiFi,ºí·çÅõ¾²
WIFI-UARTÄÁ¹öÅÍ [ESP-8266]

->WIFI½ÅÈ£¸¦ UART(RS232 TTL) ¹æ½ÄÀ¸·Î º¯ÇѽÃÄÑÁÝ´Ï´Ù.
1.3.3V ·¹º§ÀÇ TTL½ÅÈ£ Ãâ·ÂµË´Ï´Ù.
2.¾ÆµÎÀ̳볪 AVR, PIC¿¡ ȣȯ µË´Ï´Ù.
3.»ç¿ëÀü¿øÀº DC 3.3V
4.AP,STA,AP+STA¸ðµå Áö¿øµË´Ï´Ù.
£ª°¡°Ý : 3,300 ¿ø    

BAUD RATE : 115,200bps
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
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)

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10KÀúÇ×Àº PULL UPÀúÇ×ÀÌ°í

1K,2KÀúÇ×ÀÌ Áß¿ä ÇÕ´Ï´Ù.
À̺¸µå´Â 3,3V¸¦ »ç¿ëÇϱ⠶§¹®¿¡ ´Ù¸¥ º¸µå¿Í UARTÁ¢¼ÓÇÒ¶§ Çش纸µå(¿¹ : ¾ÆµÎÀ̳ë)ÀÇ UART Ãâ·ÂÀÌ 5V LEVELÀΰæ¿ì ÀÌÀúÇ×À» ¿¬°áÇØ¾ß ÇÏÁö¸¸ 3.3V LENEL UART¶ó¸é ºÒÇÊ¿ä ÇÕ´Ï´Ù.


AT COMMAND

¸ðµç ¸í·É¿¡´Â °ø¹é(½ºÆäÀ̽º) ¾ø½À´Ï´Ù.

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= 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 =,< 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 = 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 ,,,,= client or server mode
AT+CIPSTART set up TCP or UDP connection TCP/IP 1)single connection (+CIPMUX=0) AT+CIPSTART= ,,; 2) multiple connection (+CIPMUX=1) 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¡È,9999
AT+CIPMODE set data transmission mode TCP/IP AT+CIPMODE= 0 not data mode, 1 data mode; return ¡°Link is builded¡±
AT+CIPSEND send data TCP/IP 1)single connection(+CIPMUX=0) AT+CIPSEND=; 2) multiple connection (+CIPMUX=1) 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= or AT+CIPCLOSE
AT+CIFSR Get IP address TCP/IP AT+CIFSR
AT+ CIPMUX set mutiple connection TCP/IP AT+ CIPMUX= 0 for single connection 1 for multiple connection
AT+ CIPSERVER set as server TCP/IP AT+ CIPSERVER= [, ] 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=
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