Question

i am trying to integrate FMB001 with my own server.

1. Device sends IMEi
2. Server sends Ack
3. Device sends Avl data
4. server sends data ack

now when i try to send gprs command the device again sends IMEi.
where is the issue?

Answer 1

Most likely you send incorrect messages. Check the format of Codec 12 packets your are sending, pay attention to checksum.

Comments

Thank you for answering

 i am simply copying gprs command from codec 12 packets example but still the socket is being closed.

here is the link from where i am picking the instruction

https://wiki.teltonika.lt/view/Codec_12

Can this be wrong too?
If No,then where is the issue?

 kindly guide
Thank you

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That packet with getinfo command from Codec_12 page is correct, works fine for my devices.

Maybe the device closes session too early, you can check "active datalink timeout (global parameters in FMXXXX configuration)" (Open link timeout in Configurator). Also connection somehow could be closed on your side.