使用php接收IMEI后确认Teltonika GPS设备

Hi please any one can explain how to send acknowledgment from server to Teltonika GPS device? The GPS device is sending IMEI (International Mobile Equipment Identity ) number and once I get IMEI number the packet is waiting for acknowledgment.

You have to send a data like

01 // means send data to server
00 // stop sending data to server

pack("H*", "01");