Category Archives: IoT

all about Internet of things

SigFox arduino Raspberry PI hacking board

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sigfox hack board

sigfox hack board

I assume you know a little bit who I am and what I’m doing, I’m not the one to by > 100€ to buy a one shot development board kit to test & hack a device like the Telecom Design chip. So basically I built my own with the objective to work with multiple configuration.

My “cahier des charges” was to make a board able to be installed as a dauther board on a raspberry PI,  able to support an arduino, able to run autonomously and being able to own a TD1204 as a TD1208.

It was a huge work to route it and I must recognize that it do not have all the GPIO connected as I expected but it exists, it works and it help me to build my first SigFox prototypes with success.

So, now, I propose to distribute this board to those of you looking for a such swiss knife.

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TD1204 – How to use GPS device for geolocalization with Sigfox

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The TD1204 is the GPS & Accelerometer version of the sigfox Telecom Design chip. After a previous post about the use of the accelerometers (here) I’m describing how to use the GPS module.

The embedded GPS is based on a UBX G7020 chip. This chip will give you the date, time, longitude, latitude, altitude, speed and direction of the device when activated.

Read more for programming details

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Create a connected PIR sensor with SigFox

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Pir sensor

Pir sensor

In a previous blog post I described how I built a PIR sensor connected to Internet, based on the use of a Raspberry Pi device. As you can read in this previous post, the solution have a certain number of complexities like requiring a power supply, a 3G modem …

As it was originally planed to be done, here is the design of the same product, based on a SigFox device. This is really interesting to demonstrate the differences and the advantages of this technology. Let’s review how to built it !

 

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Create a 3G Pir sensor with a raspberry Pi

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Raspberry Pi 3G PIR sensor

Raspberry Pi 3G PIR sensor

Basically, it is something I was looking to do with SigFox, but unfortunately yesterday I bricked my chip because of a wire unsoldered right in the middle of the upload of a new firmware version … By the way, I’ll do it later once it will be fixed.

So I had to built it on a raspberry as a short term solution. Read next to get details

 

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What about TD1208 / Sigfox current consumption ?

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In a previous post about SigFox technology, I told I will measure the power consumption to see if the device can be use with a battery easily. And what I can say is that they have made a great job on power saving with this device.

What I measure (with my really low cost multi-meter) is a standby consumption of 2uA and a transmission power of 45mA. The transmission of a message is not depending on the size of the message and is about 7s. As you can transmit up to 1 message every 15 minutes, the communication consumption is an average of 0,35mA/h.

Assuming battery from 750mA to 2500mA this is an autonomy from 4 months to 10 months. It’s a really interesting duration on battery and not comparable with a 3G communication system.

Now … testing is finish … I’ll start to implement a first POC for a project !

Hack fun !