This is a nicely packaged key FOB that contains a Nordic nRF24L01 radio and a ATtiny24 for control. Press any one of 5 buttons and the ATtiny24 will wake up, transmit the buttons being pressed, a 16-bit integer value of the total button presses since last battery replacement, and then return to low-power sleep. The simple to replace 20mm coin cell will last for over 3 years. This unit comes fully assembled with battery and enclosure. FOB transmission range is quite nice at over 100ft. Use this FOB to communicate with any nRF24L01 radio module for your next remote control project.

Features:

• Small size
• 100ft range
• Pre-programmed
• 4uA average current

• Schematic
• FOB firmware
• Example receiver firmware
• Great Nordic tutorials