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WIFI测试
1)发送:AT+CIPSTART=“TCP”,“192.168.8.102”,8080
返回:no ip
ERROR
说明:WiFi未接入路由器,没入网
2)AT+CWJAP=“WIFI_SSID”,“WIFI_KEY”
WIFI CONNECTED
WIFI GOT IP
OK
说明:WiFi已入网并已分配IP
3)AT+CIPSTART=“TCP”,“192.168.8.102”,8080
ALREADY CONNECTED
ERROR
AT+CIPSTART=“TCP”,“192.168.8.102”,8080
CONNECT
OK
说明:已连接到服务器,可能与目的服务器不一致,可先断开服务器再连接
4)AT+CWJAP?
+CWJAP:“wifi_name”,“74:45:2d:57:bf:67”,9,-40
OK
No AP
OK
说明:查询联网状态
5)AT+CIPSTATUS
STATUS:3
+CIPSTATUS:0,“TCP”,“192.168.2.50”,8888,46493,0
OK
0: The ESP32 station is inactive.
1: The ESP32 station is idle.
2: The ESP32 Station is connected to an AP and its IP is obtained.
3: The ESP32 Station has created a TCP or UDP transmission.
4: The TCP or UDP transmission of ESP32 Station is disconnected.
5: The ESP32 Station does NOT connect to an AP.
说明:查询是否连接到服务器
6)查询本地IP
AT+CIFSR
7)考虑是否添加自动连接
AT+CWAUTOCONN=1
//wifi STA接入流程:开始》复位》设置STA模式》设置自动连接》连接路由-》连接服务器》发送数据》接受应答》结束
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