Tag Archives: arduino

How it burns in my car

Arduino Temperature SensorI make a post on measuring temperature with different sensors and an objective : watch the impact of designing a correct box for you IoT you want to put in a Car.

When sun is lighting your windshield it is not a surprise to get high temperature, but did you expect to get up to 90°C when the outside temperature is about 35°C ?

The packaging have a big impact on temperature as this post will detail it.

Continue reading

Posted in IoT | Tagged , , | 1 Comment

Measure and store multiple temperature with Arduino

Arduino Temperature SensorFor a certain IoT design I had to understand how my box design impacts the temperature of the circuit and of my battery. To understand how it works in the real environment, I made a small circuit based on an Arduino Nano to get temperature with 6 different sensors and store it in a flash memory for later use.

This post describes the way to do this multi-temperature sensor platform. Code is under GPL.

Continue reading

Posted in Hardware | Tagged , , | Leave a comment

Simple LoRa GPS tracker based on RN2483 and L80

LoRa GPS Tracker
LoRa GPS Tracker

Todays work was to make a simple GPS tracker communicating over LoRaWAN to check the coverage of my LoRaWan gateway in the city. Basically this tracker reports a position per minute to the network. If coverage is good, position will be recorded in the backend. That’s all !

This post details how to do it easily with the low cost and common components : Arduino for the master, Microchip RN2483 for LoRaWan communication and L80 for GPS positioning.


Continue reading

Posted in IoT | Tagged , , , , , | 2 Comments

First step in LoRa land – microchip RN2483 test

Microchip RN2483 Lora
Microchip RN2483 Lora

After spending some time reading and writing about LoRa it was a good time to make some real test of this technology.

As actually there is no network for LoRa, as much as I know, in my town, I expected to start a simple LoRa test (point to point and not as part of a WAN). I just bought some RN2483 LoRa module from Microchip online and also get some from Avnet (thank you Guillaume)


The module is easy to solder on a prototype board and get its command over a serial port. I choose to make two modules :

  • The first one is connected to a FTDI cable and will stay at home as a basestation
  • The second one is connected to an Arduino and will be a mobile device for my test

Continue reading

Posted in IoT, Networks | Tagged , , | 71 Comments

Installing arduino on ATtiny45 / ATtiny85

ATtiny45 and ATtiny85 are small Atmel micro-controleur like the 328p with less legs and smaller price. They can be nice platform for really small system does not requiring a lot of I/Os.

You can install Arduino on this device really easily. I won’t describe how to do because this excellent tutorial contains all what we need.

Posted in Hardware | Tagged , , , | Leave a comment

Montpellier Startup WeekEnd

magicSquare startup weekend
magicSquare startup weekend

This weekend it was my first StartupWeekend I had kind of event past year having two bootcamps with my usual company for internal startup contest. By-the-way, the startup weekend is a little bit different.

That was a really nice experience I recommend. Basically, we came with some friend with a idea about providing a gaming environment for children where boy & girls can craft their own world and animate it thanks to the brick we are providing, using a programming language composed by domino they can manipulate. They won’t use any screen, only wood & plastic stuff that interacts with their crafted world.

After pitching this, we created a team by “hiring” people found in the crowd of participants. Some was from non selected ideas, some has came by curiosity and we got a nice mix of skills to start hacking the idea. Hacking the business model, hacking the technical solution…

After 2 days of intense work we had a final pitch where the top 3 of ideas has been selected by a jury and got some prizes. Even if our team has not been selected, we had a really great days seen all these nice ideas transformed in a weekend ; starting from quite nothing to become a credible business to develop.

We went to kickstart an idea, hack it, confirm hypothesis, meet people, meet future clients… and get fun ! for all of this it was a great success I’m happy to have done and to share this spirit ; here is a video we made during the event !

magicSquare par Disk91

Thank you all – eva, nico, bruno, gautier, pierrick, teo, alex, mathieu – and the staff & coach team for this weekend. Special thank to @olivez – we are looking at your photos 🙂

I now waiting for the next event like this !

Posted in My life | Tagged , | Leave a comment

IoT disruption, why it is the appropriate time ?

In a previous post I explained why the IoT is appearing in this period thanks to the network technology evolution. It would not be a complete analysis if I would not care about the social evolution. In parallel of IoT and technologies there are other rising trends : Makers, Fablabs, embedded systems, 3d printing and crowd-founding.

Take a look at personal computing some decades ago when guys like Jobs or Gates make the first line of code and solder the first micro-processors in their garage ; they just used the technological elements available that time and were able to make them doing much more than what they have been made for. They did it because they were able to do it. The same story appends in the late 90’s with Internet : anyone was able to code some PHP stuff and create a service in his garage thanks to this students have created Facebook and many more.

At the opposite, when smart phone appeared in the middle of the 90’s it was a technology that requires strong industrial assets and this technology has been limited to major companies. The smart-phone revolution had been the same opening door to programmer to an new area with applications (apps). In fact all previous hardware evolutions since the Personal Computer beginning was requiring huge technological assets to be part of it.

IoT disruption is breaking these last 40 years where only software were hackable by getting hardware accessible.

Let see why

Continue reading

Posted in Technologies | Tagged , , , , , | 2 Comments

Add wifi to an arduino for 4€ with an ESP8266

esp8266 wifi for arduino
esp8266 wifi for arduino

The ESP8266 is a simple standalone addon for any board that works fine with Arduino and only cost less than 4€ on ebay.

It can operate as a device or an AP can gives wireless network connectivity to your application. It is interfaced with Arduino based on a serial line. The only problem of a such thing ( as for most of wifi chip ) is the power consumption. It requires about 150mA to run ; a lot for batteries.

My Friend @couac made a really good post on how to make it working with a Yabas, basically any Arduino board, I recommand the reading of his post : william post on ESP8266

Posted in Hardware | Tagged , , | Leave a comment