# Switching Frequency Plan on RAK831/Balena install **URL:** \ **Category:** Raspberry Pi Gateways\ **Created:** [February 15, 2019, 2:54am UTC](https://www.thethingsnetwork.org/forum/t/switching-frequency-plan-on-rak831-balena-install/22749 "2019-02-15T02:54:12Z")\ **Posts on this page:** 1\ **Showing post:** 2
**Author:** ![Paul\_Stewart](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/paul_stewart/32/46922_2.png) [@Paul\_Stewart](https://www.thethingsnetwork.org/forum/u/Paul_Stewart)\ **Post date:** [February 15, 2019, 4:32am UTC](https://www.thethingsnetwork.org/forum/t/switching-frequency-plan-on-rak831-balena-install/22749/2 "2019-02-15T04:32:54Z")
Could it be this? > [@RPi + RAK831 + Resin image =\> Failed to start the concentrator](https://www.thethingsnetwork.org/forum/t/rpi-rak831-resin-image-failed-to-start-the-concentrator/17836): > > Hi, I followed the instructions on the TTN page here: [https://www.thethingsnetwork.org/docs/gateways/rak831/](https://www.thethingsnetwork.org/docs/gateways/rak831/) Unfortunately, all I get is the dreaded “failed to start the concentrator” message over and over. It doesn’t go away after a few minutes; I’ve left it for 30 mins with no change. I have a Raspberry Pi 3 B+ with a RAK831 and RAK831 adapter board (just arrived today). Does anyone know what the issue could be ? Power supply is a good one, 5V@2.4A. log: /sbin/udevd 14.09.18 22:13:30 (+10… --- _[View the full topic](https://www.thethingsnetwork.org/forum/t/switching-frequency-plan-on-rak831-balena-install/22749)._