# AT!LTECA? LTECA not implemented and or Time out Error

**URL:** <https://forum.sierrawireless.com/t/at-lteca-lteca-not-implemented-and-or-time-out-error/22485>\
**Category:** MC/EM Series\
**Created:** [December 30, 2020, 5:20pm UTC](https://forum.sierrawireless.com/t/at-lteca-lteca-not-implemented-and-or-time-out-error/22485 "2020-12-30T17:20:42Z")\
**Posts on this page:** 1\
**Showing post:** 6

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**Author:** ![dl5162](https://sea1.discourse-cdn.com/flex025/user_avatar/forum.sierrawireless.com/dl5162/32/2169_2.png) [@dl5162](https://forum.sierrawireless.com/u/dl5162)\
**Post date:** [January 9, 2021, 9:00am UTC](https://forum.sierrawireless.com/t/at-lteca-lteca-not-implemented-and-or-time-out-error/22485/6 "2021-01-09T09:00:02Z")

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> [@Updating EM7565 on openwrt](https://forum.sierrawireless.com/t/updating-em7565-on-openwrt/17723/18):
>
> I documented my last EM7565 update on OpenWrt here: [https://lists.freedesktop.org/archives/libqmi-devel/2019-November/003166.html](https://lists.freedesktop.org/archives/libqmi-devel/2019-November/003166.html) Ignore the first part with the debug output. Look for the prompts (root at wrt1900ac-1) to find the 3 necessary commands. File names, versions and device names must be changed of course. Note in particular that my QDL device is ttyUSB4 because I have 4 other USB serial ports. Yours will probably be ttyUSB0, but this must be verified by eg looking at dmesg after res…

You’ll need an openwrt device with enough ram to hold the new firmware.

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