# Failed to start the concentrator - Lorank8 Issue with Packet Forwarder v4.0.1" **URL:** \ **Category:** Gateways\ **Tags:** gateways\ **Created:** [November 27, 2024, 8:50am UTC](https://www.thethingsnetwork.org/forum/t/failed-to-start-the-concentrator-lorank8-issue-with-packet-forwarder-v4-0-1/69883 "2024-11-27T08:50:18Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![marianamador](https://www.thethingsnetwork.org/forum/letter_avatar_proxy/v4/letter/m/da6949/32.png) [@marianamador](https://www.thethingsnetwork.org/forum/u/marianamador)\ **Post date:** [November 27, 2024, 8:50am UTC](https://www.thethingsnetwork.org/forum/t/failed-to-start-the-concentrator-lorank8-issue-with-packet-forwarder-v4-0-1/69883/1 "2024-11-27T08:50:18Z")
Hello everyone, I am encountering an issue with my Lorank8 gateway after updating the Packet Forwarder to version 4.0.1 (Semtech Packet Forwarder) and using the software from Ideetron’s repository. When I run lora\_pkt\_fwd, the program fails to start, giving me the following error: root@lorank8:/home/debian/lorank8v1# ./start Starting the standard Semtech packet forwarder. \*\*\* Beacon Packet Forwarder for Lora Gateway \*\*\* Version: 4.0.1 \*\*\* Lora concentrator HAL library version info \*\*\* Version: 5.0.1; * * * INFO: Little endian host INFO: found global configuration file global\_conf.json, parsing it INFO: global\_conf.json does contain a JSON object named SX1301\_conf, parsing SX1301 parameters INFO: lorawan\_public 1, clksrc 1 INFO: no configuration for LBT INFO: antenna\_gain 0 dBi INFO: no configuration for tx gain lut 12 INFO: no configuration for tx gain lut 13 INFO: no configuration for tx gain lut 14 INFO: no configuration for tx gain lut 15 INFO: Configuring TX LUT with 12 indexes INFO: radio 0 enabled (type SX1257), center frequency 867500000, RSSI offset -166.000000, tx enabled 1, tx\_notch\_freq 0 INFO: radio 1 enabled (type SX1257), center frequency 868500000, RSSI offset -166.000000, tx enabled 0, tx\_notch\_freq 0 INFO: Lora multi-SF channel 0\> radio 1, IF -400000 Hz, 125 kHz bw, SF 7 to 12 INFO: Lora multi-SF channel 1\> radio 1, IF -200000 Hz, 125 kHz bw, SF 7 to 12 INFO: Lora multi-SF channel 2\> radio 1, IF 0 Hz, 125 kHz bw, SF 7 to 12 INFO: Lora multi-SF channel 3\> radio 0, IF -400000 Hz, 125 kHz bw, SF 7 to 12 INFO: Lora multi-SF channel 4\> radio 0, IF -200000 Hz, 125 kHz bw, SF 7 to 12 INFO: Lora multi-SF channel 5\> radio 0, IF 0 Hz, 125 kHz bw, SF 7 to 12 INFO: Lora multi-SF channel 6\> radio 0, IF 200000 Hz, 125 kHz bw, SF 7 to 12 INFO: Lora multi-SF channel 7\> radio 0, IF 400000 Hz, 125 kHz bw, SF 7 to 12 INFO: Lora std channel\> radio 1, IF -200000 Hz, 250000 Hz bw, SF 7 INFO: FSK channel\> radio 1, IF 300000 Hz, 125000 Hz bw, 50000 bps datarate INFO: global\_conf.json does contain a JSON object named gateway\_conf, parsing gateway parameters INFO: gateway MAC address is configured to 1DEE3B4B876FE5E8 INFO: server hostname or IP address is configured to “eu1.cloud.thethings.network” INFO: upstream port is configured to “1700” INFO: downstream port is configured to “1700” INFO: downstream keep-alive interval is configured to 10 seconds INFO: statistics display interval is configured to 30 seconds INFO: upstream PUSH\_DATA time-out is configured to 100 ms INFO: packets received with a valid CRC will be forwarded INFO: packets received with a CRC error will NOT be forwarded INFO: packets received with no CRC will NOT be forwarded INFO: Reference latitude is configured to 38.978150 deg INFO: Reference longitude is configured to -1.856430 deg INFO: Reference altitude is configured to 686 meters INFO: Beaconing period is configured to 128 seconds INFO: Beaconing signal will be emitted at 869525000 Hz INFO: Beaconing datarate is set to SF9 INFO: Beaconing modulation bandwidth is set to 125000Hz INFO: Beaconing TX power is set to 14dBm INFO: Beaconing information descriptor is set to 0 INFO: found local configuration file local\_conf.json, parsing it INFO: redefined parameters will overwrite global parameters INFO: local\_conf.json does not contain a JSON object named SX1301\_conf INFO: local\_conf.json does contain a JSON object named gateway\_conf, parsing gateway parameters INFO: gateway MAC address is configured to 1DEE3B4B876FE5E8 INFO: packets received with a valid CRC will be forwarded INFO: packets received with a CRC error will NOT be forwarded INFO: packets received with no CRC will NOT be forwarded INFO: Reference latitude is configured to 38.978149 deg INFO: Reference longitude is configured to -1.856433 deg INFO: Reference altitude is configured to 686 meters ERROR: [main] failed to start the concentrator In the system logs (/var/log/syslog), I see this message: Nov 27 09:41:35 lorank8 systemd[1]: lorank.service: Main process exited, code=exited, status=1/FAILURE Nov 27 09:41:35 lorank8 systemd[1]: lorank.service: Unit entered failed state. Nov 27 09:41:35 lorank8 systemd[1]: lorank.service: Failed with result ‘exit-code’. I would appreciate any guidance or troubleshooting steps to resolve the issue. Thank you in advance! ---
**Author:** ![descartes](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/descartes/32/47220_2.png) [@descartes](https://www.thethingsnetwork.org/forum/u/descartes)\ **Post date:** [November 27, 2024, 10:10am UTC](https://www.thethingsnetwork.org/forum/t/failed-to-start-the-concentrator-lorank8-issue-with-packet-forwarder-v4-0-1/69883/2 "2024-11-27T10:10:38Z")
You appear to have marked a [post](https://www.thethingsnetwork.org/forum/t/issue-with-lorawan-message-transmission-via-mqtt/68206/5) on another topic as the solution - does this mean this topic is no longer needed? ---
**Author:** ![marianamador](https://www.thethingsnetwork.org/forum/letter_avatar_proxy/v4/letter/m/da6949/32.png) [@marianamador](https://www.thethingsnetwork.org/forum/u/marianamador)\ **Post date:** [November 27, 2024, 4:36pm UTC](https://www.thethingsnetwork.org/forum/t/failed-to-start-the-concentrator-lorank8-issue-with-packet-forwarder-v4-0-1/69883/3 "2024-11-27T16:36:29Z")
Yes, I am still experiencing the same issue. It hasn’t been resolved, so this topic is still needed. ---
**Author:** ![marianamador](https://www.thethingsnetwork.org/forum/letter_avatar_proxy/v4/letter/m/da6949/32.png) [@marianamador](https://www.thethingsnetwork.org/forum/u/marianamador)\ **Post date:** [December 4, 2024, 8:05am UTC](https://www.thethingsnetwork.org/forum/t/failed-to-start-the-concentrator-lorank8-issue-with-packet-forwarder-v4-0-1/69883/4 "2024-12-04T08:05:33Z")
Problem Solved: Adjusting the SPI Device Path in libloragw The problem was related to the SPI device path used by the library. After some investigation, I solved it by checking the available `spidev` devices on my system. In the file `/src/loragw_spi.native.c` within the library, there’s a line that defines the SPI device path:#define SPI\_DEV\_PATH “/dev/spidev0.0” In my case, my system was using `spidev1.0` instead of `spidev0.0`. I changed this line to:#define SPI\_DEV\_PATH “/dev/spidev1.0” After recompiling the library with this modification, everything worked as expected. I hope this helps someone facing a similar issue! If you need guidance on finding your `spidev` devices, you can check them using: ls /dev/spidev\* ---
**Author:** ![system](https://www.thethingsnetwork.org/forum/uploads/default/original/3X/6/2/6250ea44fd2b0d6259489e1a92748df681e1f970.png) [@system](https://www.thethingsnetwork.org/forum/u/system)\ **Post date:** [December 5, 2024, 8:06am UTC](https://www.thethingsnetwork.org/forum/t/failed-to-start-the-concentrator-lorank8-issue-with-packet-forwarder-v4-0-1/69883/5 "2024-12-05T08:06:02Z")
This topic was automatically closed 24 hours after the last reply. New replies are no longer allowed.