ATSTK600 Kit ( ATSTK600 ) A complete starter kit and development system for the 8-bit and 32-bit AVR microcontrollers that gives designers a quick start to develop code on the AVR, with advanced features for prototyping and testing new designs.

The chip is an Atmega88 (not P). It is drawing the same 6.5uA during sleep, with or without timer0 and timer1. So, I probably don't care if I have to leave them enabled. I am planning to use a DHT11 and a ds18B20 and write the data to a w25Q64 flash, every 12 minutes. Order today, ships today. ATMEGA88PA-MMNR – AVR AVR® ATmega Microcontroller IC 8-Bit 20MHz 8KB (4K x 16) FLASH 28-VQFN (4x4) from Microchip Technology. Pricing and Availability on millions of electronic components from Digi-Key Electronics.