This board is designed to be mounted on a Pi A+/B+, Pi 2, or Pi 3. It provides a footprint for an RFM69[H][W] module as well as two DS18B20 temperature sensors.

RFM69

• MISO: Pin 21 (SPI)
• MOSI: Pin 19 (SPI)
• SCK: Pin 23 (SPI)
• NSS: Pin 24 (CE0/GPIO8)

• DIO0: Pin 38 (GPIO20)
• DIO4: Pin 37 (GPIO26)
• RESET: Pin 40 (GPIO21)

DS18B20 x2

• DATA: Pin 7 (GPIO4)
  
• R1: 4.7K Pullup Resistor

Note: This doesn't have an I2C EEPROM and therefore doesn't meet the official specifications of a Pi HAT.