| Name of Component | Pin on Component => Pin on Microcontroller |
|---|---|
| SD Card Reader | CS => D3 SCK => D5 MOSI => D7 MISO => D6 VCC => 5V GND => G |
| Real Time Clock (RTC) | 32K => N/A SQW => N/A SCL => D1 SDA => D2 VCC => 3V3 GND => G |
| Pressure Sensor #1 (Atmospheric pressure only) | SDO => 3V3 CSB => 3V3 SDA => D2 SCL => D1 GND => G VCC => 3V3 |
| Pressure Sensor #2 (Atmospheric + rainwater pressure) | SDO => G CSB => 3V3 SDA => D2 SCL => D1 GND => G VCC => 3V3 |
| LCD Screen | SCL => D1 SDA => D2 VCC => 5V GND => G |