Yes, the SIM cards that we as IoT Creators send out are always activated when you get them delivered. And our SIM can connect to the 4G network using our publick APN: m2m.public.nl You can check our “roaming” page to read about operators and bands that you need for LTE-M at your location, please note that LTE-M is not necessarily available everywhere where you’ve got 4G coverage. If all this seems to be fine on your end and you still can’t connect please tell us the details where you got stuck. (AT commands and module logs)

Hello @Ahmed-Elhaddad, We do these tests in parallel to normal network maintenance and improvement measures and we can share some preliminary results in CE-0 conditions from measurements in our Labs. • Up to 200 devices can attach successfully simultaneously within 10 minutes under the condition that they do not immediately send data after a successful attach. • Average round trip time (RTT) increases with increasing number of parallel transmitting devices. A randomization of transmission attempts leads to reduction of RTT and potentially improvement of battery lifetime • With regards to the initial attach, only a small number of devices should be activated simultaneously (max. 60 devices) • With regards to the regular data transmission with good signal level the following was observed: • Failure rates increase with more than 160 devices trying to send 100 byte of data within one second • Introducing a randomization timer of at least 40 seconds solves this limitation • Avoiding synchronized data transmission results in better share of coverage levels across all devices • Implication - Customers should avoid synchronized attaches and data-transmission of their devices Best, Dominik

@magnatron aka ‘he who must not be named’

@afzal_m Yes of course, I’ve sent them via PM. Thanks for the quick response!

Hi Luuk, did you order SIM from IoT Creators ? https://portal.iotcreators.com/order/professional/select Because T-Mobile NL sells different SIM and only ours is connected via an IP-Sec to our UDP server. Our APN is not public. Regards, Uta

@Stefan-de-Lange , @Uta I am referring to the device’s RSSI and SNR. I want to be able to check signal quality, as I have some experimental asset trackers with GPS that I am currently testing with. With LoRaWAN devices, I found it very convenient that all kinds of additional “network”-information was available in the MQTT response (JSON) from the API.

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.

Hey @afzal_m, Thanks for explaining. This helps. Please consider making this a protocol when sending out emails about service interruptions (planned or not). And please let us know what will happen with the sent data: Will devices need to send it again or will it arrive at our application after the update was successful? Once we know this, we can tell our customers what to expect and how to act on degraded functionality,

Good to hear @BrodVictor… but it looks like I missed your post from yesterday?

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

@David-Thales I’m really looking forward to that!

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

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

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)…

@Stefan-de-Lange the PCBs for testing are open on Attribution-NonCommercial 4.0 International (CC BY-NC 4.0). https://www.akoriot.com/akoriot_akor4range_l/ You have the freedom to copy it and re-measure it. But you will get the same result. Sometimes NB-IoT is better and sometimes LoRaWAN. You should also read before you judge something.

@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.

@Crowdsourcer I don’t know. BQ24195 is pretty solid. Probe it if you need to.

@Stefan-de-Lange Power consumption wasn’t the main concern, bigger concern is network limits. I see now that a node can send up to 120 messages per day. The use case I was looking at sends data every 5 minutes, that’s 288 times a day. So actually it appears we cannot reach the 5 minute interval, at maximum every 12 minutes is possible. I did some more research into the various protocols, and it looks like the UDP protocol is the most basic one. The modem setup is actually well described in general at https://docs.iotcreators.com/docs/general-settings And more specific at https://docs.iotcreators.com/docs/_-2-attach-to-nb-iot-network I should have looked a little better before asking the question, this depends on the specific modem too I guess.

@magnatron yes it is correct But it still possible that in some places there is no network available at all. Some operators only activated part of their networks.

@Eric-Barten said in Downlink API dataformat: ary the device visualizes the received data for yo Okay, that my bad. Thanks for the answer