How to... wake up an arduino by Bluetooth? [SOLVED]

Projects Networking, Protocols, and Devices
1

Hi folks,

I have an arduino what remains sleeping for one hour. Then, a RTC wakes it up in order to capture data with different sensors, save the data into an SD card, and go to sleep again. When i want to download the data, i take the SD card and that is. But now I would like to connect a bluetooth module in order to read and download the data wirelessly. Then my question is: is it possible to wake up my sleeping arduino by the bluetooth?. I tried sending a character in order to see if it was enought to wake it up... but it doesn´t work...

Could you give me any idea about it?
Thanks!

2

Could you give me any idea about it?

A jumper from the RX pin to an external interrupt pin should cause it to wake up when serial data arrives.

3

Thanks PaulS,

A direct jump? I mean, without a resistance or a diode or any other thing? I don´t want to fried the arduino!Thanks!

Edited:

I discovered this page at the Arduino Playground. It say both things, that it is required a resitance of 220 ohms between RX and INT0 (or INT1), but it also says thats it is really not required.
http://arduino.cc/playground/Learning/ArduinoSleepCode

I tried with the resistance, and it works... but i didn´t try without resistance... Could somebody confirms that it is really not required?
Thanks!

4

It's not required unless you are using INT0/INT1 for other stuff as an output pin. Go safe use 220 Ohm it's a cheap way of having an Arduino that's not fried.

HUDIBRAS

5

Hi Hudibras,

I only use INT0 and INT1 for interrupts. But if it works perfect with a resistance, i will be in the safe side and use it. Thanks so much for your help!!

So... SOLVED!.