Terminal Hardware
TTGO T-Beam 433 MHz v0.7 or v1.1
longer 433 MHz antenna with SMA male connector
16.9 mm long tiger tail wire soldered to the female SMA socket
5 V, 3 A USB charge adapter with appropriate microUSB or USB‑C cable
Panasonic NCR18650B Li-ion cell, or quality equivalent
glue gun to stick the GPS antenna to the cell holder
SH1106 1.3” I²C (4‑pin) OLED display (slightly larger than the usual 0.8” displays often sold with the TTGO T-Beam)
enclosure