I am rather new to microcontrollers but have gotten the start of a sensor network going with the Arduino pro micro and Arduino uno. I have been using the nRF24L01 transceiver for communications and was trying to find a cheaper smaller and less power hungry solution for my microcontroller. I came across the ATtiny20 and thought I would ask anyone with more experience than I for some advice. It seems to me that the ATtiny20 should work because its specs include SPI support, but alas I really have no idea. I was also going to ask about I2C support along with the SPI, I was really hoping to use an I2C run sensor and transmit its data with the nRF24L01.
Thank you for your time and any help you can offer.