# BRN310 Boron 2G/3G no connection

**URL:** <https://community.particle.io/t/brn310-boron-2g-3g-no-connection/64886>\
**Category:** Connectivity\
**Created:** [July 6, 2023, 3:48pm UTC](https://community.particle.io/t/brn310-boron-2g-3g-no-connection/64886 "2023-07-06T15:48:25Z")\
**Posts on this page:** 7\
**Page:** 1

<div class="post-metadata">

**Author:** ![jvett](https://avatars.discourse-cdn.com/v4/letter/j/6f9a4e/32.png) [@jvett](https://community.particle.io/u/jvett)\
**Post date:** [July 6, 2023, 3:48pm UTC](https://community.particle.io/t/brn310-boron-2g-3g-no-connection/64886/1 "2023-07-06T15:48:25Z")

</div>

One of my BRN310 Boron has been having connection issues for the past couple of months, which needed a restart every couple of weeks. This helped until now, I'm not able to bring it back online.  
Device doctor tower scan is showing some cell towers, but it's not able to connect.  
Part of the log below, full log's are available [here](https://drive.google.com/drive/folders/1Zlf2aVJOqq6crns8l4fQpHRcmtU9anc1?usp=sharing)

0000180294 [mux] INFO: Starting GSM07.10 muxer  
0000180295 [mux] INFO: Openning mux channel 0  
0000180296 [mux] INFO: GSM07.10 muxer thread started  
0000180298 [mux] INFO: Openning mux channel 1  
0000180302 [ncp.at] TRACE: \> AT  
0000180305 [ncp.at] TRACE: \< OK  
0000180306 [ncp.client] TRACE: NCP state changed: 1  
0000180306 [net.pppncp] TRACE: NCP event 1  
0000180308 [net.ppp.client] TRACE: PPP thread event ADM\_UP data=0  
0000180309 [net.ppp.client] TRACE: State NONE -\> READY  
0000180310 [ncp.at] TRACE: \> AT+CFUN?  
0000180312 [app] INFO: Looking up operators (this may take up to 3 minutes)...  
0000180313 [ncp.at] TRACE: \< +CFUN: 1,0  
0000180314 [ncp.at] TRACE: \< OK  
0000180315 [ncp.at] TRACE: \> AT+CCID  
0000180682 [ncp.at] TRACE: \< +CCID: 898830700000088xxxxx  
0000180682 [ncp.at] TRACE: \< OK  
0000180683 [ncp.at] TRACE: \> AT+CGDCONT?  
0000180687 [ncp.at] TRACE: \< +CGDCONT: 1,"IP","super","0.0.0.0",0,0  
0000180688 [ncp.at] TRACE: \< OK  
0000180689 [ncp.at] TRACE: \> AT+CFUN?  
0000180691 [ncp.at] TRACE: \< +CFUN: 1,0  
0000180692 [ncp.at] TRACE: \< OK  
0000180693 [ncp.at] TRACE: \> AT+CREG=2  
0000180695 [ncp.at] TRACE: \< OK  
0000180696 [ncp.at] TRACE: \> AT+CGREG=2  
0000180698 [ncp.at] TRACE: \< OK  
0000180699 [ncp.client] TRACE: NCP connection state changed: 1  
0000180700 [net.pppncp] TRACE: NCP event 2  
0000180700 [net.pppncp] TRACE: State changed event: 1  
0000180701 [net.ppp.client] TRACE: PPP thread event LOWER\_DOWN data=0  
0000180702 [ncp.at] TRACE: \> AT+COPS?  
0000180704 [ncp.at] TRACE: \< +COPS: 0  
0000180705 [ncp.at] TRACE: \< OK  
0000180706 [ncp.at] TRACE: \> AT+CREG?  
0000180709 [ncp.at] TRACE: \< +CREG: 2,0  
0000180709 [ncp.at] TRACE: \< OK  
0000180710 [ncp.at] TRACE: \> AT+CGREG?  
0000180713 [ncp.at] TRACE: \< +CGREG: 2,0  
0000180714 [ncp.at] TRACE: \< OK  
0000180715 [ncp.at] TRACE: \> AT+COPS=5  
0000185195 [ncp.at] TRACE: \< MCC:228, MNC:03, LAC:1b5f, RAC:d8, CI:0a1b252, DLF:10762, ULF: 9812, S  
0000185197 [app] INFO: rat=UMTS mcc=228, mnc=3, lac=1b5f ci=a1b252 band=UMTS 2100 rssi=-92 dlf=1076  
0000185575 [ncp.at] TRACE: \< MCC:228, MNC:03, LAC:1b5f, RAC:d8, CI:0a1b254, DLF:10762, ULF: 9812, S  
0000185577 [app] INFO: rat=UMTS mcc=228, mnc=3, lac=1b5f ci=a1b254 band=UMTS 2100 rssi=-97 dlf=1076  
0000186475 [ncp.at] TRACE: \< MCC:228, MNC:03, LAC:1b5f, RAC:d8, CI:0a1be0a, DLF: 2938, ULF: 2713, S  
0000186477 [app] INFO: rat=UMTS mcc=228, mnc=3, lac=1b5f ci=a1be0a band=UMTS 900 rssi=-93 dlf=2938  
0000190235 [ncp.at] TRACE: \< MCC:228, MNC:01, LAC:01f9, RAC:2, CI:0692f09, DLF: 3038, ULF: 2813, SC  
0000190237 [app] INFO: rat=UMTS mcc=228, mnc=1, lac=1f9 ci=692f09 band=UMTS 900 rssi=-95 dlf=3038 u  
0000190555 [ncp.at] TRACE: \< MCC:228, MNC:01, LAC:01f9, RAC:2, CI:0692f0a, DLF: 3038, ULF: 2813, SC  
0000190557 [app] INFO: rat=UMTS mcc=228, mnc=1, lac=1f9 ci=692f0a band=UMTS 900 rssi=-106 dlf=3038  
0000193184 [ncp.at] TRACE: \< MCC:228, MNC:02, LAC:4e84, RAC:e9, CI:1be4fff, DLF: 2963, ULF: 2738, S  
0000193185 [app] INFO: rat=UMTS mcc=228, mnc=2, lac=4e84 ci=1be4fff band=UMTS 900 rssi=-109 dlf=296  
0000193564 [ncp.at] TRACE: \< MCC:228, MNC:02, LAC:4e84, RAC:e9, CI:1be4ffe, DLF: 2963, ULF: 2738, S  
0000193565 [app] INFO: rat=UMTS mcc=228, mnc=2, lac=4e84 ci=1be4ffe band=UMTS 900 rssi=-109 dlf=296  
0000252315 [ncp.at] TRACE: \< MCC:228, MNC:01, LAC:01f9, RAC:2, CI:0692f0b, DLF: 3087, ULF: 2862, SC  
0000252317 [app] INFO: rat=UMTS mcc=228, mnc=1, lac=1f9 ci=692f0b band=UMTS 900 rssi=-120 dlf=3087  
0000263190 [ncp.at] TRACE: \< OK  
0000263191 [ncp.at] TRACE: \> AT+CIMI  
0000263194 [ncp.at] TRACE: \< 234500011820451  
0000263195 [ncp.at] TRACE: \< OK  
0000263196 [ncp.at] TRACE: \> AT+CEER  
0000263199 [ncp.at] TRACE: \< +CEER: "No report available"  
0000263199 [ncp.at] TRACE: \< OK  
0000263200 [ncp.at] TRACE: \> AT+CREG?  
0000263203 [ncp.at] TRACE: \< +CREG: 2,0  
0000263204 [ncp.at] TRACE: \< OK  
0000263205 [ncp.at] TRACE: \> AT+CGREG?  
0000263208 [ncp.at] TRACE: \< +CGREG: 2,0  
0000263208 [ncp.at] TRACE: \< OK  
0000263209 [ncp.at] TRACE: \> AT+CSQ  
0000263213 [ncp.at] TRACE: \< +CSQ: 99,99  
0000263214 [ncp.at] TRACE: \< OK  
0000270414 [ncp.at] TRACE: \< +CREG: 5,"4E84","1BE4FFF",6  
0000270415 [ncp.at] TRACE: \> AT+CIMI  
0000270416 [ncp.at] TRACE: \< +CGREG: 5,"4E84","1BE4FFF",6,"E9"  
0000270418 [ncp.at] TRACE: \< 234500011820451  
0000270419 [ncp.at] TRACE: \< OK  
0000270519 [ncp.client] TRACE: NCP connection state changed: 2  
0000270520 [mux] INFO: Openning mux channel 2  
0000271685 [net.pppncp] TRACE: NCP event 100  
0000271686 [net.pppncp] TRACE: New auth info  
0000271688 [net.pppncp] TRACE: NCP event 2  
0000271689 [net.pppncp] TRACE: State changed event: 2  
0000271689 [net.ppp.client] TRACE: PPP thread event LOWER\_UP data=0  
0000271690 [net.ppp.client] TRACE: State READY -\> CONNECT  
0000271690 [net.ppp.client] TRACE: State CONNECT -\> CONNECTING  
0000271691 [ncp.at] TRACE: \> AT+CGATT?  
0000271695 [ncp.at] TRACE: \< +CGATT: 1  
0000271695 [ncp.at] TRACE: \< OK  
0000272696 [ncp.at] TRACE: \> AT  
0000272698 [ncp.at] TRACE: \< OK  
0000272699 [ncp.at] TRACE: \> ATH  
0000272702 [ncp.at] TRACE: \< OK  
0000272703 [ncp.at] TRACE: \> ATD_99__1#  
0000272707 [ncp.at] TRACE: \< CONNECT  
0000272707 [net.ppp.client] TRACE: PPP phase -\> Initialize  
0000272708 [net.ppp.client] TRACE: PPP phase -\> Establish  
0000272709 [lwip.ppp] TRACE: sent [LCP ConfReq id=0x11 \<asyncmap 0x0\> \<magic 0xb47b081\> \<ac  
0000272714 [lwip.ppp] TRACE: rcvd [LCP ConfReq id=0x1 \<asyncmap 0x0\> \<magic 0xd4fb98a1\> \<ac  
0000272715 [lwip.ppp] TRACE: sent [LCP ConfAck id=0x1 \<asyncmap 0x0\> \<magic 0xd4fb98a1\> \<ac  
0000272717 [lwip.ppp] TRACE: rcvd [LCP ConfAck id=0x11 \<asyncmap 0x0\> \<magic 0xb47b081\> \<ac  
0000272718 [lwip.ppp] TRACE: sent [LCP EchoReq id=0x0 magic=0xb47b081]  
0000272718 [net.ppp.client] TRACE: PPP phase -\> Authenticate  
0000272719 [net.ppp.client] TRACE: PPP phase -\> Network  
0000272720 [lwip.ppp] TRACE: sent [IPCP ConfReq id=0x1 \<addr 0.0.0.0\> \<msdns1 8.8.8.8\> \<msdns2 8.8.  
0000272722 [lwip.ppp] TRACE: rcvd [LCP EchoRep id=0x0 magic=0xd4fb98a1]  
0000275062 [lwip.ppp] TRACE: rcvd [LCP TermReq id=0x2]  
0000275062 [net.ppp.client] TRACE: PPP phase -\> Establish  
0000275063 [lwip.ppp] TRACE: sent [LCP TermAck id=0x2]  
0000281062 [net.ppp.client] TRACE: PPP phase -\> Disconnect  
0000281062 [net.ppp.client] TRACE: PPP phase -\> Dead  
0000281063 [net.ppp.client] TRACE: PPP thread event ERROR data=5  
0000281064 [net.pppncp] ERROR: PPP error event data=5  
0000281064 [net.ppp.client] TRACE: PPP thread event DOWN data=0  
0000281065 [net.ppp.client] TRACE: State CONNECTING -\> DISCONNECT  
0000281065 [net.ppp.client] TRACE: State DISCONNECT -\> DISCONNECTING  
0000281066 [net.ppp.client] TRACE: PPP thread event ERROR data=5  
0000281067 [net.pppncp] ERROR: PPP error event data=5  
0000281067 [net.ppp.client] TRACE: PPP thread event DOWN data=0  
0000281068 [net.ppp.client] TRACE: State DISCONNECTING -\> DISCONNECTED  
0000281068 [net.ppp.client] TRACE: State DISCONNECTED -\> CONNECT  
0000281168 [net.ppp.client] TRACE: State CONNECT -\> CONNECTING  
0000281169 [ncp.at] TRACE: \> AT+CGATT?  
0000281172 [ncp.at] TRACE: \< +CGATT: 1  
0000281173 [ncp.at] TRACE: \< OK  
0000282173 [ncp.at] TRACE: \> AT  
0000282176 [ncp.at] TRACE: \< OK  
0000282176 [ncp.at] TRACE: \> ATH  
0000282179 [ncp.at] TRACE: \< OK  
0000282180 [ncp.at] TRACE: \> ATD99_\*\*1#  
0000282184 [ncp.at] TRACE: \< CONNECT  
0000282184 [net.ppp.client] TRACE: PPP phase -\> Initialize  
0000282185 [net.ppp.client] TRACE: PPP phase -\> Establish  
0000282186 [lwip.ppp] TRACE: sent [LCP ConfReq id=0x12 \<asyncmap 0x0\> \<magic 0x74a86b41\> \<a  
0000282190 [lwip.ppp] TRACE: rcvd [LCP ConfReq id=0x1 \<asyncmap 0x0\> \<magic 0xc497f658\> \<ac  
0000282192 [lwip.ppp] TRACE: sent [LCP ConfAck id=0x1 \<asyncmap 0x0\> \<magic 0xc497f658\> \<ac  
0000282193 [lwip.ppp] TRACE: rcvd [LCP ConfAck id=0x12 \<asyncmap 0x0\> \<magic 0x74a86b41\> \<a  
0000282194 [lwip.ppp] TRACE: sent [LCP EchoReq id=0x0 magic=0x74a86b41]  
0000282195 [net.ppp.client] TRACE: PPP phase -\> Authenticate  
0000282196 [net.ppp.client] TRACE: PPP phase -\> Network  
0000282197 [lwip.ppp] TRACE: sent [IPCP ConfReq id=0x1 \<addr 0.0.0.0\> \<msdns1 8.8.8.8\> \<msdns2 8.8.  
0000282199 [lwip.ppp] TRACE: rcvd [LCP EchoRep id=0x0 magic=0xc497f658]  
0000284945 [lwip.ppp] TRACE: rcvd [LCP TermReq id=0x2]  
0000284945 [net.ppp.client] TRACE: PPP phase -\> Establish  
0000284946 [lwip.ppp] TRACE: sent [LCP TermAck id=0x2]

---

<div class="post-metadata">

**Author:** ![jvett](https://avatars.discourse-cdn.com/v4/letter/j/6f9a4e/32.png) [@jvett](https://community.particle.io/u/jvett)\
**Post date:** [July 12, 2023, 4:51am UTC](https://community.particle.io/t/brn310-boron-2g-3g-no-connection/64886/2 "2023-07-12T04:51:43Z")

</div>

I've tried releasing and reclaiming the device, as mentioned in another thread, without success.  
I'd like to invite @Colleen to take a look at the logs, so we can hopefully solve the isssue, thanks.

---

<div class="post-metadata">

**Author:** ![no1089](https://sea2.discourse-cdn.com/flex026/user_avatar/community.particle.io/no1089/32/24051_2.png) [@no1089](https://community.particle.io/u/no1089)\
**Post date:** [July 18, 2023, 5:20pm UTC](https://community.particle.io/t/brn310-boron-2g-3g-no-connection/64886/3 "2023-07-18T17:20:33Z")

</div>

Hi Jan,

From the logs it appears there are no towers available for the device to connect to as indicated by `+CREG: 2,0`. Additionally, I've checked our backend logs and I see no sessions for your SIM since the 12th.

Either the antenna on the device is not connected properly, or your local 2G/3G towers have been switched off. Have you tried the device in a different location?

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<div class="post-metadata">

**Author:** ![jvett](https://avatars.discourse-cdn.com/v4/letter/j/6f9a4e/32.png) [@jvett](https://community.particle.io/u/jvett)\
**Post date:** [July 19, 2023, 6:29am UTC](https://community.particle.io/t/brn310-boron-2g-3g-no-connection/64886/4 "2023-07-19T06:29:07Z")

</div>

Hello Chris,

Thanks for looking into it, the next 3G tower is right across the street. I've checked with another BRN310 with similar setup on my desk (id e00fce683f21f1d61a1f32a2) which shows 100% signal strength.

The concerned device has been shut off since last week, turned it on right now, so please take a look at your backend logs again, thank you.

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<div class="post-metadata">

**Author:** ![marekparticle](https://sea2.discourse-cdn.com/flex026/user_avatar/community.particle.io/marekparticle/32/22793_2.png) [@marekparticle](https://community.particle.io/u/marekparticle)\
**Post date:** [July 19, 2023, 5:47pm UTC](https://community.particle.io/t/brn310-boron-2g-3g-no-connection/64886/5 "2023-07-19T17:47:32Z")

</div>

Our estimation would be an issue with the ufl connector, perhaps it was damaged. @no1089 will DM you about next steps.

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<div class="post-metadata">

**Author:** ![no1089](https://sea2.discourse-cdn.com/flex026/user_avatar/community.particle.io/no1089/32/24051_2.png) [@no1089](https://community.particle.io/u/no1089)\
**Post date:** [July 19, 2023, 6:17pm UTC](https://community.particle.io/t/brn310-boron-2g-3g-no-connection/64886/6 "2023-07-19T18:17:41Z")

</div>

DM Sent!

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<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/flex026/uploads/particle/original/3X/6/4/64635adccc35238caa19e9b553ec3e98b163d026.png) [@system](https://community.particle.io/u/system)\
**Post date:** [January 18, 2024, 6:18am UTC](https://community.particle.io/t/brn310-boron-2g-3g-no-connection/64886/7 "2024-01-18T06:18:18Z")

</div>

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