Show Posts

This section allows you to view all posts made by this member. Note that you can only see posts made in areas you currently have access to.

Topics - jpencausse

Pages: 1
TinyDuino Processors & TinyShields / Tinyduino motion logger
« on: June 11, 2015, 03:50:59 AM »

Following this question:

I would like to create a little device that log accelerometer motions for 2 weeks on battery. So
- Tiny Accelerometer
- Tiny Duino
- Tiny Battery
- Tiny SDCard ?

The idea is to do something like motion cookies from  (

But I don't know
- if it is possible and how to handle the battery ?
- if i have to add something to keep track of the timestamp (because 3 shield is already big object)

Did someone already do that ?

TinyDuino Processors & TinyShields / TinyDuino BLE iBeacon
« on: March 16, 2015, 11:54:37 AM »

Does anybody have a sample code to do iBeacon brodcast with BLE shield ?

Thanks !

TinyDuino Processors & TinyShields / TinyScreen Glasses
« on: March 16, 2015, 08:18:01 AM »

A little weird question but does anybody know where to buy a prism for TinyScreen (like Google Glasses).

The idea would be to see throught prism and see screen too.


I'm trying to log accelerometer to SDCard and display it on TinyScreen.

Everything should be fine but nothing is write on the Card
- The card is Formated
- The SD example ar OK
- I use TinyScreen + TinySD + TinyUSB + TinyDuino

void setup(void) {
  Serial.begin(9600); while (!Serial) { ; }
  Serial.print("Initializing SD card...");
  pinMode(10, OUTPUT);
  if (!SD.begin(10)) {  Serial.println("Card failed, or not present"); return; }

void writeSD(long delta, long time){
  File dataFile ="datalog.json", FILE_WRITE);
  String str = "{ \"delta\": " + String(delta*250/1000) + ", \"duration\":" + String(time*250/1000) + "}";
  if (SD.exists("datalog.json")) {
    Serial.println("datalog.json exists.");

And SD.exists() return it do not exists ... any idea ?

User Projects / Code Examples / Tiny Offline Activity Tracker
« on: October 20, 2014, 05:28:06 PM »
How should I proceed to make an activity tracker ?

- Accelerometer to track moves
- Store changes somewhere ??? in JSON with axes and date

Should I store data in memory and download it by USB or should I store it on micro SD Card ? Do I need Tiny Clock to store time ?

May be it's a bad idea for TinyCircuits and there is already a dead simple product working offline ?


Pages: 1
SMF spam blocked by CleanTalk