Please find another close the same messages or questions on BLE indoor localisation to me as below. I get the question again and again at least once a month. It is time for a block post on this topic. What is the recommended way to implement BLE beacons to perform indoor localisation? What is the […]
IoT / M2M question by email to me: Q: Hi Harald,I found you on m2m.com forum discussion. I am an M2M enthusiast building an M2M PoC. I noticed in one of the m2m.com forum thread you suggested to Wakeup devices using SMS or Voice call. ie. Bootstrap to the GPRS network. I would like to […]
Android devices and pet trackers for life, not just for Christmas – original blog posted in Nov 2011 As Janis Joplin sang, “My friends all drive Porsches, I must make amends”. Two of my friends own an iPhone and they always buy the latest smartphones. I will “make amends” and skip buying a tablet for […]
Q: I came across a blog of yours some years back. By chance are you still offering assistance with GPS related antenna solutions? If so, we are trying to find a replacement for a Sarantel helical antenna. We need to match or improve upon the performance of the Sarantel product. We are looking into Maxtena’s […]
Abstract: IoT M2M Cookbook für die deutschsprachige Presse IoT M2M Cookbook – How to develop a device based on Wireless Wide Area Network modules Am Beispiel eines Gerätes zur Ortung wird der Aufbau einer IoT-M2M-Applikation erklärt. Dazu kommen Funkmodule für Mobilfunk und GPS zum Einsatz. Entwickler, die ein Gerät für Industrie 4.0 ohne Ortung designen, […]
How to develop a device based on Wireless Wide Area Network modules Excerpt of the IoT / M2M Cookbook here Table of contents 1 Why Did I Write the IoT / M2M Cookbook? 5 2 Fundamental considerations before starting the IoT / M2M project 7 3 Certifications and approvals 7 3.1 Examples for Radio approvals […]
As many already know, I am interested in antennas. My great interest is integrated antennas. Such antennas can be found in gateways for electricity meters, but also in portable point of sale systems. Even permanently installed telematics devices use integrated antennas. For many developers integrated antenna designs require a magician’s skills. Do you mind if […]
The question as below reach me. I will quote myself. Q: Please let me know the tips , to ensure connectivity all the time. I am loosing connectivity after 2/3 days , I need to manually reconnect by ringing the modem again as on now. A: There are several sources for disconnect. Chapter: AT commands […]
The typical faults marked with XXI and XXII in the other graphs are not visible on first view. If you have a closer look you can detect the peak at 1500 MHz range. The bandwidth of this antenna covers all the four GSM bands, UMTS 2100 and even the 2400 MHz band for Wi-Fi, Bluetooth […]
Once more you will detect the typical faults marked with XXI and XXII. The bandwidth for the lower GSM bands is very small and the triangle marker 1 for the middle of the GSM 900 band is on the right side of the gap. There is a need for a matching circuit for sure. For […]