Low power WIFI module user manual http://en.usr.cnJinan USR IOT Technology Limited tec@usr.cnPage 44/724.2.2.19. AT+ UARTTE Function: Set/Query UART free-frame trigger time between twobytes; Format: Query OperationAT+ UARTTE+ok=< LF >< LF > Set OperationAT+ UARTTE=+ok< LF >< LF > Parameters: mode: fast: free-frame trigger time between two bytes is 10ms; normal: free-frame trigger time between two bytes is 50ms;4.2.2.20. AT+ SEND Function: Send Data at Command Mode. Format:AT+SEND=+ok< LF >< LF > Parameters: data_lenth: Lenth of send data. Range: 0~1000 ByteThe UART port will wait 3 seconds for input after this command is sentOK. The data received from UART port is sent to socket. If the intervalof two bytes is more than 10ms, the data will be sent instantly.4.2.2.21. AT+ RECV Function: Receive Data at Command Mode. Format:AT+RECV=+ok=< data_lenth, data_content>< LF >< LF > Parameters: data_lenth: Lenth of receive data. Range: 0~1000 Byte data_content: contents of receive data.If not receive any data in 3 second, then feedback +ok=0.4.2.2.22. AT+ PING Function: Network “PING” Instruction. Format: Set OperationAT+ PING=<IP_address >+ok=< LF >< LF > Parameters: sta: feedback result