# Tcp client + modbus gateway (tcp/rtu) for Fastrack

**URL:** <https://forum.sierrawireless.com/t/tcp-client-modbus-gateway-tcp-rtu-for-fastrack/15453>\
**Category:** Open AT\
**Created:** [February 21, 2019, 11:25am UTC](https://forum.sierrawireless.com/t/tcp-client-modbus-gateway-tcp-rtu-for-fastrack/15453 "2019-02-21T11:25:28Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![norbertorozas](https://avatars.discourse-cdn.com/v4/letter/n/22d042/32.png) [@norbertorozas](https://forum.sierrawireless.com/u/norbertorozas)\
**Post date:** [February 21, 2019, 11:25am UTC](https://forum.sierrawireless.com/t/tcp-client-modbus-gateway-tcp-rtu-for-fastrack/15453/1 "2019-02-21T11:25:28Z")

</div>

Hi!

I’m looking for a firmware for telemetry application: Frastrack Supreme must connect to GPRS/3G/4G network, then start a TCP connection to a server, keep it connected (w keepalive packs) and reconnect every time connection drops.

Modbus gateway function is welcome too: it translate Modbus TCP from server side into modbus RTU to UART (serial port) and vice-versa.

Any idea where to find it?