user4502: I'd like to extract data collected by a battery powered arduino for example once a day without stopping it and not using SD card.
It's posible, when I want to extract the collected data, to connect a laptop through the USB and then get data because Arduino is, at regulat time intervals, calling 'Serial.println(...)'?

user46: This is a bit crude, but I think you could use an FTDI cable (which is a USB to UART converter) to have a program in your laptop talk to the Arduino using its UART (serial) interface.
To do it, you could plug the USB side of a FTDI serial cable to your laptop. The other end of the cable has a plug with 6 pins, 2 of which are the TX and RX serial signals. You could plug those two signals to pins D0 and D1 (RX & TX) of your Arduino using male-to-male jumpers.
In terms of software, you could code the Arduino sketch to listen on the serial port for a command from your laptop. When the command arrives, it would output the stored data (could be comma separated values with CR+LF as end of line). Your laptop would then listen for the answer and retrieve the data.

4502: <p>I'd like to extract data collected by a battery powered arduino for example once a day without stopping it and not using SD card.</p>

<p>It's posible, when I want to extract the collected data, to connect a laptop through the USB and then get data because Arduino is, at regulat time intervals, calling 'Serial.println(...)'?</p>
 46: <p>This is a bit crude, but I think you could use an FTDI cable (which is a USB to UART converter) to have a program in your laptop talk to the Arduino using its UART (serial) interface.</p>

<p>To do it, you could plug the USB side of a FTDI serial cable to your laptop. The other end of the cable has a plug with 6 pins, 2 of which are the TX and RX serial signals. You could plug those two signals to pins D0 and D1 (RX &amp; TX) of your Arduino using male-to-male jumpers.</p>

<p>In terms of software, you could code the Arduino sketch to listen on the serial port for a command from your laptop. When the command arrives, it would output the stored data (could be comma separated values with CR+LF as end of line). Your laptop would then listen for the answer and retrieve the data.</p>
