# RPi + RAK831 + Resin image =\> Failed to start the concentrator **URL:** \ **Category:** Raspberry Pi Gateways\ **Created:** [September 14, 2018, 12:19pm UTC](https://www.thethingsnetwork.org/forum/t/rpi-rak831-resin-image-failed-to-start-the-concentrator/17836 "2018-09-14T12:19:09Z")\ **Posts on this page:** 20\ **Page:** 1
**Author:** ![jeremyherbert](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/jeremyherbert/32/36198_2.png) [@jeremyherbert](https://www.thethingsnetwork.org/forum/u/jeremyherbert)\ **Post date:** [September 14, 2018, 12:19pm UTC](https://www.thethingsnetwork.org/forum/t/rpi-rak831-resin-image-failed-to-start-the-concentrator/17836/1 "2018-09-14T12:19:10Z")
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 (+1000) main \*\*\* Resin Machine Info: 14.09.18 22:13:30 (+1000) main \*\*\* Type: None 14.09.18 22:13:30 (+1000) main \*\*\* Arch: None 14.09.18 22:13:30 (+1000) main \*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\* 14.09.18 22:13:30 (+1000) main \*\*\* Configuration: 14.09.18 22:13:30 (+1000) main \*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\* 14.09.18 22:13:30 (+1000) main GW\_EUI: 14.09.18 22:13:30 (+1000) main Enabling TTN gateway connector 14.09.18 22:13:30 (+1000) main \*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\* 14.09.18 22:13:30 (+1000) main \*\*\* Fetching config from TTN account server 14.09.18 22:13:30 (+1000) main \*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\* 14.09.18 22:13:32 (+1000) main Gateway ID: apartment 14.09.18 22:13:32 (+1000) main Gateway Key: 14.09.18 22:13:32 (+1000) main Frequency plan: AS\_923\_925 14.09.18 22:13:32 (+1000) main Frequency plan url: [https://account.thethingsnetwork.org/api/v2/frequency-plans/AS\_923\_925](https://account.thethingsnetwork.org/api/v2/frequency-plans/AS_923_925) 14.09.18 22:13:32 (+1000) main Gateway description: apartment 14.09.18 22:13:32 (+1000) main Gateway placement: unknown 14.09.18 22:13:32 (+1000) main Router: bridge.asia-se.thethings.network 14.09.18 22:13:32 (+1000) main 14.09.18 22:13:32 (+1000) main Fallback routers: 14.09.18 22:13:32 (+1000) main mqtts://bridge.eu.thethings.network:8882 14.09.18 22:13:32 (+1000) main mqtts://bridge.us-west.thethings.network 14.09.18 22:13:32 (+1000) main mqtts://bridge.brazil.thethings.network 14.09.18 22:13:32 (+1000) main Latitude: 0 14.09.18 22:13:32 (+1000) main Longitude: 0 14.09.18 22:13:32 (+1000) main Altitude: 0 14.09.18 22:13:32 (+1000) main Gateway EUI: 14.09.18 22:13:32 (+1000) main Has hardware GPS: False 14.09.18 22:13:32 (+1000) main Hardware GPS port: /dev/ttyAMA0 14.09.18 22:13:33 (+1000) main Not sending coordinates 14.09.18 22:13:33 (+1000) main [TTN Gateway]: Resetting concentrator on pin 11 14.09.18 22:13:33 (+1000) main 12:13:33 \*\*\* Multi Protocol Packet Forwarder for Lora Gateway \*\*\* 14.09.18 22:13:33 (+1000) main Version: 3.0.20 14.09.18 22:13:33 (+1000) main 12:13:33 \*\*\* Lora concentrator HAL library version info \*\*\* 14.09.18 22:13:33 (+1000) main Version: 5.0.1; Options: native; 14.09.18 22:13:33 (+1000) main \*\*\* 14.09.18 22:13:33 (+1000) main 12:13:33 INFO: Little endian host 14.09.18 22:13:33 (+1000) main 12:13:33 INFO: found global configuration file /opt/ttn-gateway//global\_conf.json, parsing it 14.09.18 22:13:33 (+1000) main 12:13:33 INFO: /opt/ttn-gateway//global\_conf.json does contain a JSON object named SX1301\_conf, parsing SX1301 parameters 14.09.18 22:13:33 (+1000) main 12:13:33 INFO: lorawan\_public 1, clksrc 1 14.09.18 22:13:33 (+1000) main 12:13:33 INFO: 8 LBT channels configured 14.09.18 22:13:33 (+1000) main 12:13:33 INFO: antenna\_gain 0 dBi 14.09.18 22:13:33 (+1000) main 12:13:33 INFO: Configuring TX LUT with 16 indexes 14.09.18 22:13:33 (+1000) main 12:13:33 INFO: radio 0 enabled (type SX1257), center frequency 923600000, RSSI offset -166.000000, tx enabled 1 14.09.18 22:13:33 (+1000) main 12:13:33 INFO: radio 1 enabled (type SX1257), center frequency 924600000, RSSI offset -166.000000, tx enabled 0 14.09.18 22:13:33 (+1000) main 12:13:33 INFO: Lora multi-SF channel 0\> radio 0, IF -400000 Hz, 125kHz bw, SF 7 to 12 14.09.18 22:13:33 (+1000) main 12:13:33 INFO: Lora multi-SF channel 1\> radio 0, IF -200000 Hz, 125kHz bw, SF 7 to 12 14.09.18 22:13:33 (+1000) main 12:13:33 INFO: Lora multi-SF channel 2\> radio 0, IF 0 Hz, 125 kHz bw, SF 7 to 12 14.09.18 22:13:33 (+1000) main 12:13:33 INFO: Lora multi-SF channel 3\> radio 0, IF 200000 Hz, 125 kHz bw, SF 7 to 12 14.09.18 22:13:33 (+1000) main 12:13:33 INFO: Lora multi-SF channel 4\> radio 0, IF 400000 Hz, 125 kHz bw, SF 7 to 12 14.09.18 22:13:33 (+1000) main 12:13:33 INFO: Lora multi-SF channel 5\> radio 1, IF -400000 Hz, 125kHz bw, SF 7 to 12 14.09.18 22:13:33 (+1000) main 12:13:33 INFO: Lora multi-SF channel 6\> radio 1, IF -200000 Hz, 125kHz bw, SF 7 to 12 14.09.18 22:13:33 (+1000) main 12:13:33 INFO: Lora multi-SF channel 7\> radio 1, IF 0 Hz, 125 kHz bw, SF 7 to 12 14.09.18 22:13:33 (+1000) main 12:13:33 INFO: Lora std channel\> radio 1, IF -100000 Hz, 250000 Hz bw, SF 7 14.09.18 22:13:33 (+1000) main 12:13:33 INFO: FSK channel\> radio 1, IF 200000 Hz, 125000 Hz bw, 50000 bps datarate 14.09.18 22:13:33 (+1000) main 12:13:33 INFO: /opt/ttn-gateway//global\_conf.json does contain a JSON object named gateway\_conf, parsing gateway parameters 14.09.18 22:13:33 (+1000) main 12:13:33 INFO: gateway MAC address is configured to 14.09.18 22:13:33 (+1000) main 12:13:33 INFO: Found 1 servers in array. 14.09.18 22:13:33 (+1000) main 12:13:33 INFO: Server 0 configured to “bridge.asia-se.thethings.network” 14.09.18 22:13:33 (+1000) main 12:13:33 INFO: filename for statistical performance is configured to"loragwstat.json" 14.09.18 22:13:33 (+1000) main 12:13:33 INFO: packets received with a valid CRC will be forwarded 14.09.18 22:13:33 (+1000) main 12:13:33 INFO: packets received with a CRC error will NOT be forwarded 14.09.18 22:13:33 (+1000) main 12:13:33 INFO: packets received with no CRC will NOT be forwarded 14.09.18 22:13:33 (+1000) main 12:13:33 INFO: GPS is disabled 14.09.18 22:13:33 (+1000) main 12:13:33 INFO: Upstream data is enabled 14.09.18 22:13:33 (+1000) main 12:13:33 INFO: Downstream data is enabled 14.09.18 22:13:33 (+1000) main 12:13:33 INFO: Ghoststream data is disabled 14.09.18 22:13:33 (+1000) main 12:13:33 INFO: Radiostream data is enabled 14.09.18 22:13:33 (+1000) main 12:13:33 INFO: Statusstream data is enabled 14.09.18 22:13:33 (+1000) main 12:13:33 INFO: Beacon is disabled 14.09.18 22:13:33 (+1000) main 12:13:33 INFO: Packet logger is disabled 14.09.18 22:13:33 (+1000) main 12:13:33 INFO: Flush output after statistic is disabled 14.09.18 22:13:33 (+1000) main 12:13:33 INFO: Flush after each line of output is disabled 14.09.18 22:13:33 (+1000) main 12:13:33 INFO: Watchdog is disabled 14.09.18 22:13:33 (+1000) main 12:13:33 INFO: Contact email configured to “” 14.09.18 22:13:33 (+1000) main 12:13:33 INFO: Description configured to “apartment” 14.09.18 22:13:33 (+1000) main 12:13:33 INFO: [Transports] Initializing protocol for 1 servers 14.09.18 22:13:34 (+1000) main 12:13:34 INFO: [TTN] server “bridge.asia-se.thethings.network” connected 14.09.18 22:13:34 (+1000) main 12:13:34 INFO: [main] Starting the concentrator 14.09.18 22:13:35 (+1000) main 12:13:35 ERROR: [main] failed to start the concentrator ---
**Author:** ![Amedee](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/amedee/32/39610_2.png) [@Amedee](https://www.thethingsnetwork.org/forum/u/Amedee)\ **Post date:** [September 14, 2018, 12:41pm UTC](https://www.thethingsnetwork.org/forum/t/rpi-rak831-resin-image-failed-to-start-the-concentrator/17836/2 "2018-09-14T12:41:39Z")
Can you confirm you have setup `RESIN_HOST_CONFIG_core_freq` and `RESIN_HOST_CONFIG_dtoverlay` as described in the article? Also I would encourage reducing the SPI speed to e.g. 5MHz by setting the `SPI_SPEED` parameterto 5000000. ---
**Author:** ![jeremyherbert](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/jeremyherbert/32/36198_2.png) [@jeremyherbert](https://www.thethingsnetwork.org/forum/u/jeremyherbert)\ **Post date:** [September 14, 2018, 12:46pm UTC](https://www.thethingsnetwork.org/forum/t/rpi-rak831-resin-image-failed-to-start-the-concentrator/17836/3 "2018-09-14T12:46:00Z")
Yep, this is my resin config: ![resin_io___quiet-dew](https://www.thethingsnetwork.org/forum/uploads/default/original/3X/3/f/3fbc62a30ecf3dffe5846c915a128856c4579d9d.png) I have set the SPI speed to 5MHz, but with no difference unfortunately. ---
**Author:** ![kersing](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/kersing/32/44777_2.png) [@kersing](https://www.thethingsnetwork.org/forum/u/kersing)\ **Post date:** [September 14, 2018, 1:11pm UTC](https://www.thethingsnetwork.org/forum/t/rpi-rak831-resin-image-failed-to-start-the-concentrator/17836/4 "2018-09-14T13:11:20Z")
Have you set the reset pin? From the instructions: > 1. Enter “GW\_RESET\_PIN” (no quotes) and value 11. ---
**Author:** ![Amedee](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/amedee/32/39610_2.png) [@Amedee](https://www.thethingsnetwork.org/forum/u/Amedee)\ **Post date:** [September 14, 2018, 1:15pm UTC](https://www.thethingsnetwork.org/forum/t/rpi-rak831-resin-image-failed-to-start-the-concentrator/17836/5 "2018-09-14T13:15:25Z")
Looks like that one was good 😉 > [@jeremyherbert](#): > > ```auto > 14.09.18 22:13:33 (+1000) main [TTN Gateway]: Resetting concentrator on pin 11 > > ``` ---
**Author:** ![jeremyherbert](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/jeremyherbert/32/36198_2.png) [@jeremyherbert](https://www.thethingsnetwork.org/forum/u/jeremyherbert)\ **Post date:** [September 14, 2018, 11:54pm UTC](https://www.thethingsnetwork.org/forum/t/rpi-rak831-resin-image-failed-to-start-the-concentrator/17836/6 "2018-09-14T23:54:17Z")
Just an update here: I installed the poly packet forwarder using these instructions: [https://github.com/ttn-zh/ic880a-gateway/tree/spi](https://github.com/ttn-zh/ic880a-gateway/tree/spi) It works perfectly once I restart the RAK831 manually. So I think there might be a bug in the resin build? Edit: Also, with the resin image, the RAK831 never even got warm, so it was clearly not switching on. But I did observe the LEDs changing as the device was reset. I also left the system to run overnight and it did not do anything, but the ic880a-gateway system worked first try. ---
**Author:** ![Amedee](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/amedee/32/39610_2.png) [@Amedee](https://www.thethingsnetwork.org/forum/u/Amedee)\ **Post date:** [September 15, 2018, 7:54am UTC](https://www.thethingsnetwork.org/forum/t/rpi-rak831-resin-image-failed-to-start-the-concentrator/17836/7 "2018-09-15T07:54:55Z")
This one does not use the same software stack… It is strange. A bug is always possible, but this resin setup is already running on quite a lot of gateways without trouble. ---
**Author:** ![jeremyherbert](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/jeremyherbert/32/36198_2.png) [@jeremyherbert](https://www.thethingsnetwork.org/forum/u/jeremyherbert)\ **Post date:** [September 15, 2018, 11:49am UTC](https://www.thethingsnetwork.org/forum/t/rpi-rak831-resin-image-failed-to-start-the-concentrator/17836/8 "2018-09-15T11:49:08Z")
I tried a complete run through from scratch again this morning with the resin instructions, but still same result. Has anyone tested the resin build with AS923? ---
**Author:** ![jeremyherbert](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/jeremyherbert/32/36198_2.png) [@jeremyherbert](https://www.thethingsnetwork.org/forum/u/jeremyherbert)\ **Post date:** [September 15, 2018, 11:51am UTC](https://www.thethingsnetwork.org/forum/t/rpi-rak831-resin-image-failed-to-start-the-concentrator/17836/9 "2018-09-15T11:51:27Z")
Aha! AU915 works fine with the resin setup, but AS923 is broken. ---
**Author:** ![jeremyherbert](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/jeremyherbert/32/36198_2.png) [@jeremyherbert](https://www.thethingsnetwork.org/forum/u/jeremyherbert)\ **Post date:** [September 15, 2018, 12:04pm UTC](https://www.thethingsnetwork.org/forum/t/rpi-rak831-resin-image-failed-to-start-the-concentrator/17836/10 "2018-09-15T12:04:00Z")
Ok, it’s definitely due to setting the frequency plan to AS923. If I set it to AU915 in the console and reboot the gateway, it comes up fine. Switching to AS923 gives the same error as above, and then switching back to AU915 it works again. I was running AS923 with the poly forwarder and it seemed to start fine? @kersing are you the maintainer of this? Do you know if it has it been tested with AS923? ---
**Author:** ![Amedee](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/amedee/32/39610_2.png) [@Amedee](https://www.thethingsnetwork.org/forum/u/Amedee)\ **Post date:** [September 15, 2018, 3:55pm UTC](https://www.thethingsnetwork.org/forum/t/rpi-rak831-resin-image-failed-to-start-the-concentrator/17836/11 "2018-09-15T15:55:22Z")
Frequency plan if automatically fetched from TTN. E.g. for EU plan, it gets [https://account.thethingsnetwork.org/api/v2/frequency-plans/EU\_863\_870](https://account.thethingsnetwork.org/api/v2/frequency-plans/EU_863_870) and for AS: [https://account.thethingsnetwork.org/api/v2/frequency-plans/AS\_923\_925](https://account.thethingsnetwork.org/api/v2/frequency-plans/AS_923_925) This URL is provided by TTN, as well as the data. It would be interesting to see which configuration you get with the Zurich setup and how it is different from this one… When I look at the plans, the AS has a `lbt_cfg` field that e.g. EU or AU don’t have. I don’t know if it has an impact or not though… ---
**Author:** ![kersing](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/kersing/32/44777_2.png) [@kersing](https://www.thethingsnetwork.org/forum/u/kersing)\ **Post date:** [September 15, 2018, 7:57pm UTC](https://www.thethingsnetwork.org/forum/t/rpi-rak831-resin-image-failed-to-start-the-concentrator/17836/12 "2018-09-15T19:57:48Z")
Poly from zh repo does not support LBT (listen before talk) MP does. That may cause the forwarder not to be able initialize the radio. ---
**Author:** ![jeremyherbert](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/jeremyherbert/32/36198_2.png) [@jeremyherbert](https://www.thethingsnetwork.org/forum/u/jeremyherbert)\ **Post date:** [September 16, 2018, 11:47pm UTC](https://www.thethingsnetwork.org/forum/t/rpi-rak831-resin-image-failed-to-start-the-concentrator/17836/13 "2018-09-16T23:47:41Z")
With the zurich setup I used this config manually: [https://github.com/TheThingsNetwork/gateway-conf/blob/master/AS2-global\_conf.json](https://github.com/TheThingsNetwork/gateway-conf/blob/master/AS2-global_conf.json) Is there some way to confirm that listen-before-talk is what is breaking MP? ---
**Author:** ![Amedee](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/amedee/32/39610_2.png) [@Amedee](https://www.thethingsnetwork.org/forum/u/Amedee)\ **Post date:** [September 17, 2018, 9:37am UTC](https://www.thethingsnetwork.org/forum/t/rpi-rak831-resin-image-failed-to-start-the-concentrator/17836/14 "2018-09-17T09:37:43Z")
You can try the following in the resin setup: in [run.py line 191](https://github.com/jpmeijers/ttn-resin-gateway-rpi/blob/master/run.py#L191) add: ```auto if 'lbt_cfg' in sx1301_conf: print "Removing LBT configuration" del sx1301_conf['lbt_cfg'] ``` and see if it works… ---
**Author:** ![jeremyherbert](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/jeremyherbert/32/36198_2.png) [@jeremyherbert](https://www.thethingsnetwork.org/forum/u/jeremyherbert)\ **Post date:** [September 17, 2018, 10:10am UTC](https://www.thethingsnetwork.org/forum/t/rpi-rak831-resin-image-failed-to-start-the-concentrator/17836/15 "2018-09-17T10:10:54Z")
Hi Amedee, Yes, that does fix it. But is LBT required for LoRaWAN compliance? ---
**Author:** ![jeremyherbert](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/jeremyherbert/32/36198_2.png) [@jeremyherbert](https://www.thethingsnetwork.org/forum/u/jeremyherbert)\ **Post date:** [September 17, 2018, 10:16am UTC](https://www.thethingsnetwork.org/forum/t/rpi-rak831-resin-image-failed-to-start-the-concentrator/17836/16 "2018-09-17T10:16:31Z")
Ok I take that back. The logs look fine, but it doesn’t show up as “connected” on the ttn platform? 17.09.18 20:14:31 (+1000) main ##### 2018-09-17 10:14:31 GMT ##### 17.09.18 20:14:31 (+1000) main ### [UPSTREAM] ### 17.09.18 20:14:31 (+1000) main # RF packets received by concentrator: 0 17.09.18 20:14:31 (+1000) main # CRC\_OK: 0.00%, CRC\_FAIL: 0.00%, NO\_CRC: 0.00% 17.09.18 20:14:31 (+1000) main # RF packets forwarded: 0 (0 bytes) 17.09.18 20:14:31 (+1000) main # PUSH\_DATA datagrams sent: 0 (0 bytes) 17.09.18 20:14:31 (+1000) main # PUSH\_DATA acknowledged: 0.00% 17.09.18 20:14:31 (+1000) main ### [DOWNSTREAM] ### 17.09.18 20:14:31 (+1000) main # PULL\_DATA sent: 0 (0.00% acknowledged) 17.09.18 20:14:31 (+1000) main # PULL\_RESP(onse) datagrams received: 0 (0 bytes) 17.09.18 20:14:31 (+1000) main # RF packets sent to concentrator: 0 (0 bytes) 17.09.18 20:14:31 (+1000) main # TX errors: 0 17.09.18 20:14:31 (+1000) main ### BEACON IS DISABLED! 17.09.18 20:14:31 (+1000) main ### [JIT] ### 17.09.18 20:14:31 (+1000) main # INFO: JIT queue contains 0 packets. 17.09.18 20:14:31 (+1000) main # INFO: JIT queue contains 0 beacons. 17.09.18 20:14:31 (+1000) main ### GPS IS DISABLED! 17.09.18 20:14:31 (+1000) main ### [PERFORMANCE] ### 17.09.18 20:14:31 (+1000) main # Upstream radio packet quality: 0.00%. 17.09.18 20:14:31 (+1000) main ### [CONNECTIONS] ### 17.09.18 20:14:31 (+1000) main # bridge.asia-se.thethings.network: Connected 17.09.18 20:14:31 (+1000) main # Semtech status report send. 17.09.18 20:14:31 (+1000) main ##### END ##### 17.09.18 20:14:31 (+1000) main 10:14:31 INFO: [TTN] bridge.asia-se.thethings.network RTT 176 17.09.18 20:14:31 (+1000) main 10:14:31 INFO: [TTN] send status success for bridge.asia-se.thethings.network 17.09.18 20:15:01 (+1000) main 17.09.18 20:15:01 (+1000) main ##### 2018-09-17 10:15:01 GMT ##### 17.09.18 20:15:01 (+1000) main ### [UPSTREAM] ### 17.09.18 20:15:01 (+1000) main # RF packets received by concentrator: 1 17.09.18 20:15:01 (+1000) main # CRC\_OK: 0.00%, CRC\_FAIL: 100.00%, NO\_CRC: 0.00% 17.09.18 20:15:01 (+1000) main # RF packets forwarded: 0 (0 bytes) 17.09.18 20:15:01 (+1000) main # PUSH\_DATA datagrams sent: 0 (0 bytes) 17.09.18 20:15:01 (+1000) main # PUSH\_DATA acknowledged: 0.00% 17.09.18 20:15:01 (+1000) main ### [DOWNSTREAM] ### 17.09.18 20:15:01 (+1000) main # PULL\_DATA sent: 0 (0.00% acknowledged) 17.09.18 20:15:01 (+1000) main # PULL\_RESP(onse) datagrams received: 0 (0 bytes) 17.09.18 20:15:01 (+1000) main # RF packets sent to concentrator: 0 (0 bytes) 17.09.18 20:15:01 (+1000) main # TX errors: 0 17.09.18 20:15:01 (+1000) main ### BEACON IS DISABLED! 17.09.18 20:15:01 (+1000) main ### [JIT] ### 17.09.18 20:15:01 (+1000) main # INFO: JIT queue contains 0 packets. 17.09.18 20:15:01 (+1000) main # INFO: JIT queue contains 0 beacons. 17.09.18 20:15:01 (+1000) main ### GPS IS DISABLED! 17.09.18 20:15:01 (+1000) main ### [PERFORMANCE] ### 17.09.18 20:15:01 (+1000) main # Upstream radio packet quality: 0.00%. 17.09.18 20:15:01 (+1000) main ### [CONNECTIONS] ### 17.09.18 20:15:01 (+1000) main # bridge.asia-se.thethings.network: Connected 17.09.18 20:15:01 (+1000) main # Semtech status report send. 17.09.18 20:15:01 (+1000) main ##### END ##### 17.09.18 20:15:01 (+1000) main 10:15:01 INFO: [TTN] bridge.asia-se.thethings.network RTT 185 17.09.18 20:15:01 (+1000) main 10:15:01 INFO: [TTN] send status success for bridge.asia-se.thethings.network 17.09.18 20:15:31 (+1000) main 10:15:31 INFO: Disabling GPS mode for concentrator’s counter… 17.09.18 20:15:31 (+1000) main 10:15:31 INFO: host/sx1301 time offset=(1537179208s:679266µs) - drift=-235µs 17.09.18 20:15:31 (+1000) main 10:15:31 INFO: Enabling GPS mode for concentrator’s counter. 17.09.18 20:15:31 (+1000) main 17.09.18 20:15:31 (+1000) main 17.09.18 20:15:31 (+1000) main ##### 2018-09-17 10:15:31 GMT ##### 17.09.18 20:15:31 (+1000) main ### [UPSTREAM] ### 17.09.18 20:15:31 (+1000) main # RF packets received by concentrator: 0 17.09.18 20:15:31 (+1000) main # CRC\_OK: 0.00%, CRC\_FAIL: 0.00%, NO\_CRC: 0.00% 17.09.18 20:15:31 (+1000) main # RF packets forwarded: 0 (0 bytes) 17.09.18 20:15:31 (+1000) main # PUSH\_DATA datagrams sent: 0 (0 bytes) 17.09.18 20:15:31 (+1000) main # PUSH\_DATA acknowledged: 0.00% 17.09.18 20:15:31 (+1000) main ### [DOWNSTREAM] ### 17.09.18 20:15:31 (+1000) main # PULL\_DATA sent: 0 (0.00% acknowledged) 17.09.18 20:15:31 (+1000) main # PULL\_RESP(onse) datagrams received: 0 (0 bytes) 17.09.18 20:15:31 (+1000) main # RF packets sent to concentrator: 0 (0 bytes) 17.09.18 20:15:31 (+1000) main # TX errors: 0 17.09.18 20:15:31 (+1000) main ### BEACON IS DISABLED! 17.09.18 20:15:31 (+1000) main ### [JIT] ### 17.09.18 20:15:31 (+1000) main # INFO: JIT queue contains 0 packets. 17.09.18 20:15:31 (+1000) main # INFO: JIT queue contains 0 beacons. 17.09.18 20:15:31 (+1000) main ### GPS IS DISABLED! 17.09.18 20:15:31 (+1000) main ### [PERFORMANCE] ### 17.09.18 20:15:31 (+1000) main # Upstream radio packet quality: 0.00%. 17.09.18 20:15:31 (+1000) main ### [CONNECTIONS] ### 17.09.18 20:15:31 (+1000) main # bridge.asia-se.thethings.network: Connected 17.09.18 20:15:31 (+1000) main # Semtech status report send. 17.09.18 20:15:31 (+1000) main ##### END ##### 17.09.18 20:15:31 (+1000) main 10:15:31 INFO: [TTN] bridge.asia-se.thethings.network RTT 181 17.09.18 20:15:31 (+1000) main 10:15:31 INFO: [TTN] send status success for bridge.asia-se.thethings.network ---
**Author:** ![Amedee](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/amedee/32/39610_2.png) [@Amedee](https://www.thethingsnetwork.org/forum/u/Amedee)\ **Post date:** [September 17, 2018, 10:25am UTC](https://www.thethingsnetwork.org/forum/t/rpi-rak831-resin-image-failed-to-start-the-concentrator/17836/17 "2018-09-17T10:25:42Z")
> [@jeremyherbert](#): > > Yes, that does fix it. But is LBT required for LoRaWAN compliance? I cannot answer that – If you would use the Zurich setup it wouldn’t do LBT 😉 Now, it would be good to understand why the concentrator doesn’t start with LBT – it is either a problem with the config file or with the mp forwarder. This is more a question for @kersing 🤓 > [@jeremyherbert](#): > > The logs look fine, but it doesn’t show up as “connected” on the ttn platform? It might be a transient problem of the bridge, the log looks good. I think it will appear sometime. Does it forwards packets? ---
**Author:** ![kersing](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/kersing/32/44777_2.png) [@kersing](https://www.thethingsnetwork.org/forum/u/kersing)\ **Post date:** [September 17, 2018, 9:08pm UTC](https://www.thethingsnetwork.org/forum/t/rpi-rak831-resin-image-failed-to-start-the-concentrator/17836/18 "2018-09-17T21:08:50Z")
> [@Amedee](#): > > it is either a problem with the config file or with the mp forwarder. You are missing one component in the list, the concentrator and more specifically the fpga firmware level. MP works on different hardware with lbt enabled so I don’t think it will be an issue with the software. However being in EU868 I am unable to check. (I am not about to start running lorawan hardware configured for frequencies used by mobile operators over here) ---
**Author:** ![jeremyherbert](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/jeremyherbert/32/36198_2.png) [@jeremyherbert](https://www.thethingsnetwork.org/forum/u/jeremyherbert)\ **Post date:** [September 17, 2018, 10:14pm UTC](https://www.thethingsnetwork.org/forum/t/rpi-rak831-resin-image-failed-to-start-the-concentrator/17836/19 "2018-09-17T22:14:21Z")
Couldn’t you just enable LBT for EU868? Or terminate the antenna with a 50ohm load? ---
**Author:** ![kersing](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/kersing/32/44777_2.png) [@kersing](https://www.thethingsnetwork.org/forum/u/kersing)\ **Post date:** [September 17, 2018, 11:08pm UTC](https://www.thethingsnetwork.org/forum/t/rpi-rak831-resin-image-failed-to-start-the-concentrator/17836/20 "2018-09-17T23:08:19Z")
Depending on the hardware LBT is not supported below 915MHz. As far as I know I don’t have hardware that does support below 915MHz. You do not seriously expect me to spend money on gateway hardware I can’t legally use over here, do you? This is a hobby that is consuming too much money and takes too much of my free time as it is… (Ask me again when I’m making money out of my work on MP forwarder, however, don’t expect it to happen soon) [Next page](https://www.thethingsnetwork.org/forum/t/rpi-rak831-resin-image-failed-to-start-the-concentrator/17836.md?page=2)