# WP76xx device cannot connect to AirVantage - cannot Sync **URL:** \ **Category:** Legato Application Framework\ **Created:** [November 20, 2019, 1:10pm UTC](https://forum.legato.io/t/wp76xx-device-cannot-connect-to-airvantage-cannot-sync/4851 "2019-11-20T13:10:58Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![IanL](https://avatars.discourse-cdn.com/v4/letter/i/bc8723/32.png) [@IanL](https://forum.legato.io/u/IanL)\ **Post date:** [November 20, 2019, 1:10pm UTC](https://forum.legato.io/t/wp76xx-device-cannot-connect-to-airvantage-cannot-sync/4851/1 "2019-11-20T13:10:58Z")
Hi there, I have a WP7607-1 based device. It is listed in my AirVantage registry as “ready” (So the “Activation” worked on the AirVantage side) - When I try to “Synchronize” the AirVantage site never seems to get reply. - The device does attempts t open a connection to AirVANTAGE I do see the following error reports on the device: ``` Jan 6 00:05:50 swi-mdm9x28-wp user.info Legato: INFO | avcDaemon[969] | Jan 06 00:05:50 WARN dtls not connected (8) Jan 6 00:05:50 swi-mdm9x28-wp user.info Legato: INFO | avcDaemon[969] | Jan 06 00:05:50 WARN cannot send ClientHello Jan 6 00:05:51 swi-mdm9x28-wp user.info Legato: INFO | CellularNetworkHandler[890] | 64 bytes from 8.8.8.8: seq=3 ttl=52 time=190.216 ms Jan 6 00:05:51 swi-mdm9x28-wp user.info Legato: INFO | CellularNetworkHandler[890] | --- 8.8.8.8 ping statistics --- 4 packets transmitted, 4 packets received, 0% packet loss round-trip min/avg/max = 190.216/230.568/342.194 ms Jan 6 00:05:51 swi-mdm9x28-wp user.info Legato: INFO | CellularNetworkHandler[890]/CellularNetworkHandlerComponent T=main | CellularNetwork.cpp checkConnectivity() 290 | Google DNS ping success Jan 6 00:05:51 swi-mdm9x28-wp user.info Legato: INFO | CellularNetworkHandler[890]/CellularNetworkHandlerComponent T=main | CellularNetworkHandler.cpp _CellularNetworkHandlerComponent_COMPONENT_INIT() 84 | Successfull heartbeat, next one in 30 seconds ``` and ``` Nov 20 12:47:29 | -WRN- | avcDaemon[969]/avcDaemon T=main | avcClient.c EventHandler() 628 | Authentication to BS failed Nov 20 12:47:29 | =ERR= | avcDaemon[969]/avcDaemon T=main | avcClient.c EventHandler() 544 | Session failure Nov 20 12:47:29 | =ERR= | avcDaemon[969]/avcDaemon T=main | avcClient.c EventHandler() 552 | Session failure on bootstrap server Nov 20 12:47:29 | =ERR= | avcDaemon[969]/avcDaemon T=main | osTimer.c lwm2mcore_TimerStop() 173 | Unable to stop the timer Nov 20 12:47:29 | =ERR= | avcDaemon[969]/avcDaemon T=main | osTimer.c lwm2mcore_TimerStop() 179 | Timer reference is NULL Nov 20 12:47:29 | INFO | avcDaemon[969]/avcDaemon T=main | avcServer.c ProcessUserAgreement() 1503 | Broadcast notification to applications Nov 20 12:47:29 | INFO | avcDaemon[969]/avcDaemon T=main | avcServer.c ProcessUserAgreement() 1503 | Broadcast notification to applications Nov 20 12:47:29 | INFO | dcsDaemon[987]/dcsDaemon T=main | dcsServer.c TryStopDataSession() 1698 | Tearing down data session Nov 20 12:47:29 | -WRN- | dcsDaemon[987]/le_pa_dcs T=main | pa_dcs_linux.c pa_dcs_SetDefaultGateway() 511 | Default gateway or interface is empty Nov 20 12:47:29 | INFO | dcsDaemon[987]/dcsCellular T=main | dcsCellular.c DcsCellularConnEventStateHandler() 258 | State of connection 1 transitioned from up to down Nov 20 12:47:46 | -WRN- | modemDaemon[1019]/modemDaemon T=main | le_mdc.c le_mdc_IsIPv4() 1699 | Could not get the Session Type Nov 20 12:47:46 | -WRN- | modemDaemon[1019]/modemDaemon T=main | le_mdc.c le_mdc_IsIPv6() 1733 | Could not get the Session Type Nov 20 12:47:46 | -WRN- | CellularNetworkHandler[890]/CellularNetworkHandlerComponent T=main | CellularNetwork.cpp checkConnectivity() 278 | Couldn't get Session type. Consider it's IPV4 ``` I am uncertain as to why my Boot Server authorisation would fail, or how to ensure a dtls connection. Any help in further debugging/setup gratefully received. Regards, Ian * * * ---
**Author:** ![IanL](https://avatars.discourse-cdn.com/v4/letter/i/bc8723/32.png) [@IanL](https://forum.legato.io/u/IanL)\ **Post date:** [November 20, 2019, 1:22pm UTC](https://forum.legato.io/t/wp76xx-device-cannot-connect-to-airvantage-cannot-sync/4851/2 "2019-11-20T13:22:45Z")
Hello again, forgot to also day that I get the following error: ```auto Nov 20 13:19:51 | DBUG | atQmiLinker[937]/atQmiLinker T=unknown | atForward.c QmiAtCmdCb() 161 | Received:`at+wdsi=8191^M ' Nov 20 13:19:51 | DBUG | atQmiLinker[937]/atQmiLinker T=Writer | atLinker.c Writer() 334 | cmd: `at+wdsi=8191^M ' Nov 20 13:19:51 | =ERR= | atAirVantage[928]/atAirVantage T=main | atAirVantage.c SetIndications() 929 | Unsupported indications levels cannot be set ``` when I send the AT command `at+wdsi=8191`. Regards, Ian ---
**Author:** ![fdu](https://sea1.discourse-cdn.com/flex019/user_avatar/forum.legato.io/fdu/32/811_2.png) [@fdu](https://forum.legato.io/u/fdu)\ **Post date:** [November 22, 2019, 2:20pm UTC](https://forum.legato.io/t/wp76xx-device-cannot-connect-to-airvantage-cannot-sync/4851/3 "2019-11-22T14:20:53Z")
Hi Please try AT+WDSI=4479 According to > Nov 20 12:47:29 | -WRN- | avcDaemon[969]/avcDaemon T=main | avcClient.c EventHandler() 628 | Authentication to BS failed > Nov 20 12:47:29 | =ERR= | avcDaemon[969]/avcDaemon T=main | avcClient.c EventHandler() 544 | Session failure > Nov 20 12:47:29 | =ERR= | avcDaemon[969]/avcDaemon T=main | avcClient.c EventHandler() 552 | Session failure on bootstrap server You have an issue with your device Can you indicate the response to AT+WDSG command please ? ---
**Author:** ![IanL](https://avatars.discourse-cdn.com/v4/letter/i/bc8723/32.png) [@IanL](https://forum.legato.io/u/IanL)\ **Post date:** [November 26, 2019, 1:55pm UTC](https://forum.legato.io/t/wp76xx-device-cannot-connect-to-airvantage-cannot-sync/4851/4 "2019-11-26T13:55:17Z")
Hi Freeric, Sorry for the delay. Here is the output to at\_wdsg and at+cgdcont? +WDSI: 4 +WDSI: 5 at+wdsg +WDSG: 0,2 +WDSG: 1,0 OK AT+CGDCONT? +CGDCONT: 1,“IP”,“[wireless.twilio.com](http://wireless.twilio.com)”,“0.0.0.0”,0,0,0,0 +CGDCONT: 2,“IPV4V6”,“ims”,“0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0”,0,0,0,0 +CGDCONT: 3,“IPV4V6”,“sos”,“0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0”,0,0,0,1 Regards, Ian ---
**Author:** ![IanL](https://avatars.discourse-cdn.com/v4/letter/i/bc8723/32.png) [@IanL](https://forum.legato.io/u/IanL)\ **Post date:** [November 29, 2019, 5:48pm UTC](https://forum.legato.io/t/wp76xx-device-cannot-connect-to-airvantage-cannot-sync/4851/5 "2019-11-29T17:48:57Z")
Any ideas on what could be happening ? Regards, Ian ---
**Author:** ![cchenry](https://avatars.discourse-cdn.com/v4/letter/c/a183cd/32.png) [@cchenry](https://forum.legato.io/u/cchenry)\ **Post date:** [November 30, 2019, 4:29pm UTC](https://forum.legato.io/t/wp76xx-device-cannot-connect-to-airvantage-cannot-sync/4851/6 "2019-11-30T16:29:07Z")
Hi Ian, What version of Legato are you using? I suspect the issue is LE-12952, in which BS credentials can become corrupt. BR, Chris