Alain,

My French is nowhere near as good as your English, :-)

Thankfully, the internet has given us google translate which works quite well with french and where it stumbles I can normally work out the meaning when put into the correct context.

I've had a look around but am a bit confused around 2 things.

1. I'll need a jumper to allow the user to input "Programming mode" - Not sure where to put it, would GP3 with a pulldown res work or can I use any other GP?
2. Once I have read the value I can flash the LED a couple of times to show the user the chip has the reading, however, when the chip reboots, how do i store the value in memory that will not be reset on a power cycle, :-)

Easy to explain but quite complex principles to work out, :-) seems like i might be getting ahead of myself.