# Laird Sentrius RS1XX on TTN - Firmware update failure

**URL:** <https://www.thethingsnetwork.org/forum/t/laird-sentrius-rs1xx-on-ttn-firmware-update-failure/27762>\
**Category:** End Devices (Nodes)\
**Created:** [July 4, 2019, 9:33am UTC](https://www.thethingsnetwork.org/forum/t/laird-sentrius-rs1xx-on-ttn-firmware-update-failure/27762 "2019-07-04T09:33:14Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![Brandberg](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/brandberg/32/35697_2.png) [@Brandberg](https://www.thethingsnetwork.org/forum/u/Brandberg)\
**Post date:** [July 5, 2019, 3:16pm UTC](https://www.thethingsnetwork.org/forum/t/laird-sentrius-rs1xx-on-ttn-firmware-update-failure/27762/2 "2019-07-05T15:16:50Z")

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Just a quick update - this issue was experienced when using an ios device running software version 12.3.2 which seems to have been the issue. When I installed the Sentrius Mobile app on an iPhone with ios version 12.3.1 (I assume anything lower will work as well) the units successfully updated their firmware without hanging up. No support from Laird but suspect incompatibility somewhere.

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