# LDS01 not receiving join accept **URL:** \ **Category:** Dragino\ **Created:** [December 7, 2024, 2:33pm UTC](https://www.thethingsnetwork.org/forum/t/lds01-not-receiving-join-accept/70003 "2024-12-07T14:33:32Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![lucasmatic](https://www.thethingsnetwork.org/forum/letter_avatar_proxy/v4/letter/l/b19c9b/32.png) [@lucasmatic](https://www.thethingsnetwork.org/forum/u/lucasmatic)\ **Post date:** [December 7, 2024, 2:33pm UTC](https://www.thethingsnetwork.org/forum/t/lds01-not-receiving-join-accept/70003/1 "2024-12-07T14:33:32Z")
This is a beginners question, so please be gentle. Recently I acquired two second-hand LDS01 door sensors as my first devices. The gateway they are supposed to connect to is a Dragino LPS8 indoor-gateway. Unfortunately I am unable to make them join. Both devices keep sending join requests which are approved: ![Screenshot 2024-12-07 152705](https://www.thethingsnetwork.org/forum/uploads/default/original/3X/d/1/d1d940b1150d1e255758317aa439391b444962f2.jpeg) But they never receive the answer. This is what the console on the devices keeps saying: ```auto [644596] *****UpLinkCounter= 0***** [644600]TX on freq 868100000 Hz at DR 5 [644674]txDone [649661]RX on freq 868100000 Hz at DR 5 [649696]rxTimeOut [650701]RX on freq 869525000 Hz at DR 0 [650908]rxTimeOut [651618] *****UpLinkCounter= 0***** [651622]TX on freq 868100000 Hz at DR 5 [651696]txDone [656682]RX on freq 868100000 Hz at DR 5 [656717]rxTimeOut [657724]RX on freq 869525000 Hz at DR 0 [657931]rxTimeOut [658639] *****UpLinkCounter= 0***** [658644]TX on freq 868500000 Hz at DR 4 [658769]txDone [663758]RX on freq 868500000 Hz at DR 4 [663797]rxTimeOut [664796]RX on freq 869525000 Hz at DR 0 [665003]rxTimeOut ``` Right now I am at a loss. I have the suspicion that the devices have been re-configured by the previous owner in a way that makes them unable to receive the join accept messages. But maybe I am wrong there. Can somebody point me in a direction where I can start troubleshooting this issue? ---
**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:** [December 7, 2024, 3:19pm UTC](https://www.thethingsnetwork.org/forum/t/lds01-not-receiving-join-accept/70003/2 "2024-12-07T15:19:24Z")
Almost always, failure to join when there is a join accept being sent is about distance from gateway - too close and it will overload the device receiver - 10m or more plus a wall is good - for such a small device with such a small antenna, maybe no more than a few hundred metres. Can you look on the gateway console and tell us what the RSSI & SNR is for the Join Request please, that will give us an idea of signal strength etc. > [@lucasmatic](#): > > I have the suspicion that the devices have been re-configured by the previous owner in a way that makes them unable to receive the join accept messages. Join Accept is accepted, all good. ---
**Author:** ![lucasmatic](https://www.thethingsnetwork.org/forum/letter_avatar_proxy/v4/letter/l/b19c9b/32.png) [@lucasmatic](https://www.thethingsnetwork.org/forum/u/lucasmatic)\ **Post date:** [December 8, 2024, 8:12pm UTC](https://www.thethingsnetwork.org/forum/t/lds01-not-receiving-join-accept/70003/3 "2024-12-08T20:12:11Z")
Thank you for your reply. This is what I found in the gateway’s console: ```auto Sun Dec 8 21:09:09 2024 daemon.info fwd[19285]: JOIN_REQ:{"Size":23, "Rssi":-91, "snr":8, "AppEUI":"0000000000000000", "DevEUI":"A84041FAB18298B8"} Sun Dec 8 21:09:09 2024 daemon.info fwd[19285]: DEBUG~ [db] Unable to find key 'appskey' in family 'devinfo/00000000' Sun Dec 8 21:09:11 2024 daemon.info fwd[19285]: Sun Dec 8 21:09:11 2024 daemon.info fwd[19285]: PKT~ [server-down] {"txpk":{"imme":false,"tmst":716557467,"freq":868.5,"rfch":0,"powe":14,"modu":"LORA","datr":"SF7BW125","codr":"4/5","ipol":true,"size":33,"ncrc":true,"data":"IP3npQD/J3UgMuukt2z32uF70lMo25lQNFMijzuJazBT"}} Sun Dec 8 21:09:11 2024 daemon.info fwd[19285]: DEBUG~ [server-down] A packet enqueue, us=716557467, cur_us=713415090 Sun Dec 8 21:09:11 2024 daemon.info fwd[19285]: #########DEBUG########### Sun Dec 8 21:09:11 2024 daemon.info fwd[19285]: 20FDE7A500FF27752032EBA4B76CF7DAE17BD25328DB99503453228F3B896B3053 Sun Dec 8 21:09:11 2024 daemon.info fwd[19285]: #########DEBUG########### Sun Dec 8 21:09:11 2024 daemon.info fwd[19285]: JOIN_ACCEPT:{"Size":33, "NetID":"00FF27", "DevAddr":"EB322075", "DLSettings":{"RX1DRoffset":2, "RX2DR":4}} Sun Dec 8 21:09:12 2024 daemon.info fwd[19285]: [LBT-TTY] uart open /dev/ttyUSB0 failed!ERROR~ [LBT] cannot open tty path, continue Sun Dec 8 21:09:13 2024 daemon.info fwd[19285]: INFO~ [server-down] PULL_ACK received in 33 ms Sun Dec 8 21:09:14 2024 daemon.info fwd[19285]: WARNING~ [JIT] lgw_send failed, chan(868500000) unaviable(lbt) ``` ---
**Author:** ![lucasmatic](https://www.thethingsnetwork.org/forum/letter_avatar_proxy/v4/letter/l/b19c9b/32.png) [@lucasmatic](https://www.thethingsnetwork.org/forum/u/lucasmatic)\ **Post date:** [December 8, 2024, 9:36pm UTC](https://www.thethingsnetwork.org/forum/t/lds01-not-receiving-join-accept/70003/4 "2024-12-08T21:36:21Z")
So I moved one of the devices to the basement, the gateway is in the attic. Thats a couple of walls and ceilings, and should amount to a distance of about ten meters. I even connected it to a bench power supply to make sure the battery is not an issue. **And it started to work.** Thanks so much for your input. ---
**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 9, 2024, 9:37pm UTC](https://www.thethingsnetwork.org/forum/t/lds01-not-receiving-join-accept/70003/5 "2024-12-09T21:37:14Z")
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