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I have Node Script I was receive a packet but when i send command throught tcp socket.write('000000000000000C0C01050000000467677073010000EFCA')  but i did not receive a command response i just receive avl data 

help me 
thanks 

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Hello,

Device responds to Codec12 in hexadecimal stream, which when parsed should include have a response message, which is the same as when you send an SMS message. Make sure you do not use Teltonika parser for Codec12 messages.

More information can be found on our wiki: https://wiki.teltonika-mobility.com/view/Teltonika_data_sending/receiving_protocols#Codec_12

Best regards,

Simonas