M2M Machine to Machine

Archive for 'M2M FAQ, hints, tips' Category

Workshop LTE – Fragen und Antworten zu Tests und Zulassungen

The LTE Workshop will be offered in German language. Sorry for that. A summary and minutes of meeting I will make public later on in English.
LTE Workshop
Unten stehend die Agenda zum LTE Workshop. Mein Beitrag ist “Antennendesign und Optimierung”. Vorab: Mit der falschen Antenne schafft man niemals einen PTCRB OTA Test. Die falsche Antenne führt [...]

GPS repeater

This GPS repeater kit is a complete re-radiating system to allow you to re-radiate the GPS carrier indoors. The GPS repeater kit consists of a roof antenna, a plug-in re-radiating amplifier and a re-radiating antenna. The roof antenna is a L1/L2 35dB Gain, 50 ohm antenna. The re-radiating amplifier has a 110V/220V plug-in transformer [...]

Can you please give me a hint why it can’t register into GSM network?

Question reached me by email.
Q: I write you because I am having troubles with the GSM/GPS shield. Can you please give me a hint why it can’t register into GSM network?
A: I will explain you how to power on a GSM module in in general.
1. Power supply / antenna

Connect GSM antenna
Put SIM card [...]

Indoor positioning without GPS / GNSS

Indoor positioning without GPS / GNSS has its benefits. Its helps to get a position, where no GPS / GNSS signal can be received. It also can be used as a backbone for GPS / GNSS. Nevertheless it can be cheaper.
Indoor positioning by Bluetooth Low Energy
Bluetooth Low Energy also called Bluetooth 4.0 was renamed to [...]

Liquid level meter with integrated GSM modem

This friendly support question liquid level meter with an integrated GSM modem reached me today
“I am not sure if this is the appropriate way to ask a technical question or if you have the time to answer this kind of questions atall, but I am desperate so I will just try.
I purchased a liquid level [...]

6LoWPAN Bluetooth Low Energy

Out of 6LoWPAN mailing list
In April, we adopted the Bluetooth Low Energy draft as a working group
document, which since has seen four revisions.  The authors now
believe that this document is ready for last-call, and I haven’t heard
otherwise from the WG.
We now start the Working Group Last Call on:
http://tools.ietf.org/html/draft-ietf-6lowpan-btle-04
Once it passes WG last-call, the document [...]

How to minimise IP traffic in cellular networks?

The questions related to IP traffic in cellular networks reached me.
Q: The other question about data transfer is about how cell phone
companies charge for data transmission. If I send a IP/UDP packet,
this will obviously be billed to me. But if somebody sends me an
IP/UDP packet will it be charged only if I receive it? Will [...]

GPS, Glonass, Galileo and better precision?

This questions related to GNSS (GPS, Glonass, Galileo) reached me.
Q: “I work for a company that develops GPS tracking devices. I have been reading your posts on M2M and you seem to be an expert regarding GSM/UMTS/ETC and GPS. There are two questions I want to ask you. Number one is with Galileo, you seem [...]

Android running on your uC Core? Can we use it for a smart home gateway?

The question as below reached me:
“Is Android running on your uC Core? Please explain your solution. We are building smart home gateway right now on 32 bit processor with Android.”
Smart home gateway proposal
On the uC Core will run the Arduino SDK. Nevertheless, on the uC you can run several operating systems (e.g. Free RTOS). It [...]

GSM and GPS meets short-range radio

The last two weeks has been requested the interaction between OBU (On Board Unit) and short-range radios in several times. A trailer detection on inexpensive 2400 MHz radio modules is indeed already published. http://www.gsm-modem.de/M2M/m2m-faq/trailer-detection-active-rfid/
Through the use of ICs, which were developed for consumer products, the bill of materials is very low.
Last week, a GSM / [...]