• State Not Answered
  • Replies 11 replies
  • Subscribers 75 subscribers
  • Views 2280 views
  • Users 0 members are here
Attachments (0)
Nordic Case Info
  • Case ID: 316802
Options

ESM Error Code 50: type ipv4 only allowed (NRF91 Asset Tracker)

Dominic

Hi 

I am a bit stuck on this one. 

Hardware: NRF91 Thingy, NRF91 DK

Firmware: Asset Tracker with latest MFW v1.3.5

I have been connecting with 1oT SIM using NRF91Thingy and DK perfectly for the last 4 months - and it is usually the O2 cell tower (LTE-M Roaming) as there is no other tower nearby. I left it attached and logging on October 22nd 2023 and a few hours later disconnected, I have not been able to connect since. Every time I connect, or use AT+COPS it attaches then immediately detached with ESM 50 code - (PDN type IPv4 only allowed). I have contacted 1oT and they haven't reported anything with O2 network.

Modem trace as follows:

%CESQ: 32,1,16,2
+CEREG: 2,"02D0","07F87C78",7
+CSCON: 1
%CESQ: 33,1,9,1
%CESQ: 33,1,14,2
[00:00:01.534,149] <inf> app_event_manager: DATA_EVT_CONFIG_INIT
[00:00:01.935,821] <inf> app_event_manager: MODEM_EVT_LTE_CELL_UPDATE
+CGEV: ME PDN ACT 0,0
+CNEC_ESM: 50,0              <------- Error Code
%MDMEV: SEARCH STATUS 2
+CEREG: 5,"02D0","07F87C78",7,,,"11100000","11100000"
+CGEV: NW DETACH             <------- Detach
+CGEV: ME PDN DEACT 0
+CEREG: 2
%CESQ: 35,1,19,2

I have never seen this issue before and nothing has changed in the firmware since I started logging started. 1oT assume its hardware/firmware related - and suggested I changed the PDN context to use IPv4 only, same result. I also switched to IPv6, it gives a EMM 15 error in that case. We can connect to Vodafone just fine, but it is quite low signal, either way O2 has always been the closest and the best to connect to. 

Has anyone had similar issues? 

Parents
  • 0

    The  ESM 50 is quite usual and doesn't prevent the modem from proper operating. 

    There are a couple of rumors around Telefonica/O2. One says, that a lot of MVNO are only offering O2/LTE not LTE-M. The modems where able to register into O2/LTE (shown as LTE-M), but e.g. PSM was missing. Now the base-stations are getting updated, which enables LTE-M with PSM, but that requires also the MVNOs to update their subscriptions and forward that to their users. Not sure, what's true or not.

Reply
  • 0

    The  ESM 50 is quite usual and doesn't prevent the modem from proper operating. 

    There are a couple of rumors around Telefonica/O2. One says, that a lot of MVNO are only offering O2/LTE not LTE-M. The modems where able to register into O2/LTE (shown as LTE-M), but e.g. PSM was missing. Now the base-stations are getting updated, which enables LTE-M with PSM, but that requires also the MVNOs to update their subscriptions and forward that to their users. Not sure, what's true or not.

Children
No Data
Related
Terms of service