Network & Coverage

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  PSM NB-IoT Timer
  nb-iot germany connection psm tau timer • • Henning Neuse  

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  @Ronan-Lacroix I have a question: The min value for T3412 is only valid for the “extended” version of TAU ? Does the 1 hour apply also to the min. value of standard TAU or is it shorter? Having a min TAU of 1 hour seems to me for many use cases difficult because the devices in those use cases need to wakeup from sleeping much more often (e.g. every 10 minutes). Many many thanks for your support! Regards, Roland I
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  RRC inactivity timer duration for NB-IoT and LTE-M
  nb-iot lte-m power saving rrc • • Alessandro Parmigiani  

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  @Stefan-de-Lange Sorry for the late answer. I have been trying with the URC logs and they confirm my suspects. Data are sent just at the beginning of the connected mode. Then a RRC inactivity timer of about 5 seconds follows. Do you know why providers are choosing in favor of longer or shorter DRX inactivity timer as well as an inactivity timer with DRX cycles?
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  Ip but no ping
  connection nb-iot network • • HNEE  

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  Fixed: The AT commands for this module are slightly different for this chip.
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  TCP listener seems to be killed or stalled
  tcp listerer killed • • Adriaan  

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  Dear all, Thanks to hints from @Kolja-Vornholt , I found a link that with forking works great for me: Sending the input to my parser with socat. All request will now be handled by their own fork. Example for Linux: socat -u TCP4-LISTEN:4445,keepalive,reuseaddr,fork STDOUT | php -f /bin/parseTCPdata4445.php Thanks to this post: https://stackoverflow.com/questions/44886399/output-a-linux-command-to-a-url-port-or-scocket-instead-of-writing-it-to-a-file/68299500#68299500 Thanks again, @Kolja-Vornholt
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  tmux and netcat listener Linux question
  linux netcat listener • • Adriaan  

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  @Adriaan This post continues here: click link (Why can we not edit posts?)
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  Collegial roaming?
  roaming carrier aggregation • • magnatron  

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  @Kolja-Vornholt The problem was as summarized: I’ve set our modem to band 20-only. I want to use auto-attach (at+cops=0) but it did not find a network However, manual attach (with selecting Vodafone’s network) did work Doing something else for about 30 minutes around the time @Kolja-Vornholt left the reply about searching the network. Trying the search only gave me seemingly non-related info (“90104”), But trying the auto-COPS suddenly did the trick and attached in no time. So, it doesn’t really seem like a solution yet…
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  TCP listener remains occupied due to absence of read() and shutdown()?
  tcp occupied • • Adriaan  

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  @Adriaan Well, at least I can reproduce the issue. On the sending side on Linux, the -N flag does the thing. echo "Hello there" | nc machine.domain <port> -N -v 2>&1 When connecting to a remote host, and using strace -r -f netcat -k -l <port> , setting the -N flag results in 0.000596 read(4, "", 16308) = 0 0.000354 shutdown(4, SHUT_RD) = 0 Without the -N flag, listener remains listening, and hence not closing the connection. This is the last line then: 0.000404 poll([{fd=0, events=POLLIN}, {fd=4, events=0}, {fd=4, events=POLLIN}, {fd=1, events=0}], 4, -1 Next step is that I am going to look if I can change something on the listener side as well. Greetz, Adriaan
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  NBAccess.getTime() gives UTC() - 4 hours
  mkrnb1500 utc tim • • gerrit seigers  

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  I try to connect with LTE-M to T-Mobile with a MKR NB 1500 Arduino module. But when I ask for current time from the cellurar module I get the EPoch time that is 4 hours earlier than my local time. Has anyone solver this problem. #MKRNB1500
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  Data packet size [Roaming]
  roaming • • MeneerJacco  

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  As roaming is more or less transparent for the device as well as backend-end server, this recommendation formulated here https://forum.iotcreators.com/topic/594/data-packet-size still applies.
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  NB-IoT devices lost connection on 27-Apr
  nbiot conn • • Athanasios Karapatis  

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  Hi, Is there a problem with the T-Mobile NBIoT network. Quite some devices having a connection with T-Mobile went offline at night between 26 and 27 April Thanks, Thanas
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  Unable to connect to network after roaming (NL --> BE --> NL)
  sim card roaming belgium • • MeneerJacco  

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  Hi @MeneerJacco please send me your ICCID or IMSI in a private message via the forum chat tool and I’m going to look at your tariff. Thanks, Uta
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  Mapping CellID to location
  api bc95 location cellid • • Artur S  

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  Hi Artur, one of our customers have been using https://opencellid.org/ in the past for cell-id localization. Telekom is also working together with Polte which offer an IoT localization API. You can learn more here: https://iotcreators.com/en/iot-location-api/ and sign up if you want to try it. Florian
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  StarterKit and french SFR NB-IOT Sim
  starterkit f-sfr sim • • Claude RICHARD  

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  Hi @Claude-RICHARD Welcome, happy to have you here :-). Unfortunately you can only use our UDP server with simcards from Deutsche Telekom. We can send you one, but there is another problem: we do not have NB-IoT roaming in France (yet)…
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  Roaming - local network partners
  roaming carrier aggregation restrictions • • JakubT  

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  @Uta - Hello! Yes, the activity is expected as a field is test is ongoing (yesterday and today). Additional logs from the 2 SIMs at of the day today via email would be again appreciated.
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  This topic is deleted!
  • dfhsdfhsdfh  

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  The message never arrives from the device
  connection portal udp • • bakonyip95  

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  Hi Peter, I just contacted you via our support channel so I can do some additional tests to your connection. Can you please send my your IMEIs as a response to the email which you just got. Many thanks! Regards, Roland
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  Possible to see which (roaming) operator handled the message?
  roaming • • magnatron  

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  We can find this out by looking up the connection info in our network. Can you please send me the ICCID (number on the sim-card) or IMSI via DM or support@iotcreators.com? Thanks!
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  Device registration failure in LTE-M Cat-M1
  network lte-m registration cat m1 • • Herr Bruns  

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  I see successful connections in our backend and will send you details by email.
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  NBIoT Roaming
  nb-iot telekom coverage • • rhalflex  

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  The GSMA offers a “Mobile IoT Deployment Map”. You can click on a country and see various information per technology type e.g. which operator deployed that network type and even URL’s of the operators’ maps for that country (if the MNO made it available). GSMA is improving and enhancing it continuously.
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  SIM card - IMSI used?
  imei imsi block sim • • Lauwie007  

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  Yeap! The thief can only re-use the sim-card when he registeres his own IMEI number and used the sim with his IMEI.
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  'Registration' messages have a strange or incorrect timetag (and contain old data)
  nb-iot registration json • • Cees Meijer  

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  @afzal_m I have just checked our logs over the last two weeks. They are full of registration messages, and the last one is on February 20.
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  Configuration of APN (and other parameters) for Telekom Global EU eSims over Europe
  lte-m telekom coverage esim apn lte cat-m1 europe • • inka O  

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  @inka-O internet.telekom is for smartphones. it won’t work for NB-IoT and the SIM cards are not allowed to use it I believe.
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  Cell reselection with NB-IoT
  nb-iot handover • • FrancoisD  

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  @FrancoisD , Cell reselection is natively supported by the NB-IoT network, there is nothing to be done at the module level to enable this feature. Best regards, Ronan