Gala, components and BLE

Hello World!

I had a busy schedule this week end, and it didn’t let me a lot of time to work. Fortunately, the Gala was amazing!!

Today we finished the research for the components we will use in our project. We still have a few remaining questions, but we hope that everything will be clear tomorrow. Personally, I looked for a led (and it was really hard to pick one among thousands of leds!!) and a resistor to protect it. I also investigated on how to plug the solar panel on the board. I hesitate between choosing a coaxial connector (because the solar panel we will order uses it) or leaving two pins to connect any kind of solar panel.

Then we tried to think about the BLE architecture we will use. However it was harder than expected, and I think we need to hack a few things in order to really understand how it works. This will be our main task next week, with the design of the PCB.

About the STM32 labs, I didn’t have time to work on the potentiometer, but I will start tomorrow evening (I begin to worry a little bit about this because I have a lot of things planned next week in addition to ROSE and I must have finished the lab by Thursday).

May the force be with you!

LEDzep and work

Since my last post, I’ve been quite busy preparing Friday presentation about 802.15.4/Zigbee with Adèle, studying, getting the damn green LED of the Olimex STM32P407 board to turn on, and various Rose related occupations.

The week end will be entirely occupied with Monday first LEDzep presentation, which I expect to be amazing.

I took some time to make some equipment research (camera, LED, motors etc), and some sketches, maybe a bit imaginative with the scale, but the purpose was only to give an overall visual description of the project.

Structure sans le ballon Structure avec ballon



Cool stuff of the day : I just received five white 90cm latex balloons I ordered a few days ago in order to do some tests.  Each weights around 35g and inflates quite easily. Here it is, only inflated at two thirds of their maximum diameter, because my lungs were tired. It is closed using only a simple clothes peg. The bananas are for scale comparison

Latex balloon !