Assemble the Sundial by stacking an LCD1602 and a Neo-6M GPS shield onto an Arduino UNO. Confirm that the GPS shield’s RX and TX pins are connected to Arduino’s D2 and D3; adjust the gpsSerial object in code if needed.

Upload the 00_naive.ino sketch to the Arduino.

While the Sundial remains connected to your computer, open the Serial Monitor in the Arduino IDE and verify that raw GPS sentences appear approximately once per second.

Power the Sundial using a USB solar panel, wait for sunny conditions, go outdoors (ideally to an open, elevated area), orient the panel toward the Sun, and wait for the device to display the time.