Hi,

Is there any way to use store data from a temperature sensor into the flash or rom of the atmega microcontrollers?

Is it possible to interface a memory card (micro SD) with the same microcontrollers in order to data on?

Thanks

 

Of course, both are possible. Saving to EEPROM is the simplest but has limited space.

 

do you know how ?

 

You need to select a device, get the data sheet for it, and analyze the interface signals to see if they are compatible with your AVR uC. A memory card may work with little problem. It also might be easier to use a serial memory device.

Much depends on the particular AVR uC you have, what interface protocols it has built in, and how many I/O pins are available for signaling to the memory device.

 

SD-card is easy to interface with a low pincount, as they use SPI.
This tutorial is one of many on internet.
http://www.avrfreaks.net/index.php?name=PNphpBB2&file=viewtopic&t=66846

You can avoid buying an expencive cardholder, if you buy a micro SD complete with an adapter and solder the adapter directly to the circuitboard.