IoT M2M blog

BuddyGuard camera: A brilliant idea with a tragic end

Harald Naumann — Tue, 16 Jul 2024 20:09:55 +0000

In 2015, the startup BuddyGuard launched a campaign on Kickstarter. The product was the Flare security camera. Faces and suspicious noises were to be recognised locally on the camera. The homeowner was proactively warned of intruders. A revolutionary approach: AI-based face and audio recognition: The camera differed from the competition in that it processed video […]

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IoT at level crossing with 5G gateway on NeoMesh, NBIoT and LTEM

Harald Naumann — Tue, 05 Sep 2023 15:54:34 +0000

Deutsche Bahn’s implementation of NeoMesh in combination with NBIoT/LTEM marks a major revolution in the Internet of Things (IoT), particularly in improving safety at level crossings. Unlike traditional LPWAN (Low Power Wide Area Network) technologies, NeoMesh offers an innovative approach to IoT communications that will redefine the future of IoT applications. Let’s take a closer […]

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Quectel BG951 – NB-IoT, LTE-M, GNSS module

Harald Naumann — Sun, 13 Feb 2022 17:49:46 +0000

Quectel BG951 – NB-IoT, LTE-M, GNSS module The Quectel BG951 is based on Altair Semiconductor. The eDRX (extended Discontinuous Reception)/PSM (Power Saving Mode) ensures low power consumption. With a super-low current consumption of approximately 1,5 uA in PSM mode, the Quectel BG951 offers a long operating life of 10 to 15 years on a single […]

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Quectel BG770 – NB-IoT, LTE-M, GNSS module

Harald Naumann — Wed, 24 Feb 2021 10:46:39 +0000

Quectel BG770 – NB-IoT, LTE-M, GNSS module The Quectel BG770 is based on the Altair Semiconductor ALT1250. The eDRX (extended Discontinuous Reception)/PSM (Power Saving Mode) ensures low power consumption. With a super-low current consumption of approximately 3 uA in PSM mode, the Quectel BG770 offers a long operating life of 10 to 15 years on […]

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PCB-F-antenna for NB-IoT, LTE-M and GSM

Harald Naumann — Sat, 16 Jan 2021 21:28:46 +0000

Q: Thanks for all the materials you shared. I am reading the cookbook but I can only find some guidelines so build a GSM IFA antenna. A: Can you please share with me the exact dimensions you used in your simulation? Q: As I previously mentioned, I just bought your book to copy-paste your antenna […]

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In which frequency bands will LTE-M and NB-IoT operate in DACH?

Harald Naumann — Wed, 06 Jan 2021 16:23:26 +0000

Q: I have a question before I start my development. I seem to remember that you mentioned in an email that we need more bands for LTE-M. Are frequency band 8 and 20 not enough? The answer about frequency bands for LTE-M and NB-IoT in DACH A: The question about frequency bands for LTE-M / […]

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NB-IoT / LTEM / LoRaWAN design question – CoAP, MQTT, MQTT-SN?

Harald Naumann — Mon, 09 Nov 2020 21:13:54 +0000

I get questions about LPWAN designs each week. The question below I will answer online, because it is a generic question. NB-IoT / LTEM / LoRaWAN design question: Hi Harald, We’ve been in contact a few times a few years ago now (!), discussing low power wireless and RF topics. Great to see how much […]

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Which LPWAN do you use for an emergency call button?

Harald Naumann — Fri, 01 May 2020 13:32:50 +0000

First of all, we have to establish whether the mobile emergency call button is to be used locally in a building, on a company campus, or nationwide in a European or a non-European country. In this article, we will first limit the mobile emergency button to use in Germany. The design for Germany can easily […]

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A short digital Christmas novel

Harald Naumann — Sat, 14 Dec 2019 18:06:08 +0000

As Santa Claus will soon be bringing presents, let me tell you a seasonal tale of the energy and cost savings with SubGHz Mesh-Net crafted as a Christmassy challenge. Santa’s sledge moves around the world. His reindeer are changed several times during Christmas night. Each reindeer, all the elves and the toy factory at the […]

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GSM / NB-IoT antenna and radio certification

Harald Naumann — Sat, 02 Nov 2019 14:05:57 +0000

Questions about radio certification will be answered in our LPWAN and BLE seminars. About 1/3 of the time we explain how to certify wireless IoT devices. The wireless part is only a small part which has to be tested according to RED. Question about certification and antenna Q: I have a question for you. It […]

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