In the interest of reducing power consumption, I am putting the Arduino into sleep mode between taking sensor readings. However, the data from readings are stored in arrays, and must not be erased when the device enters sleep mode.
For clarity, I am using sleep_mode_pwr_down, and triggering an interrupt using the Watchdog Timer on the ATMega328 chip. See this post for a description of the different sleep modes: What are (or how do I use) the power saving options of the Arduino to extend battery life?
It would be possible to address this issue by writing data to the EEPROM, however, I am unsure whether this is necessary. The question is whether putting the device into sleep_mode_pwr_down erases the dynamic memory?
Specs / Context:
Arduino Uno (ATMega328 chip)