Pogo Pins "Spear Head" (10 pack) - P75-LM3 si7021 but included in the product)

but included in the product) which should last at least 8 years if the I2C interface is only used while the device has 5V power available

UART interface (TTL) with programmable baud rate (SPP firmware installed)

border-radius:8px} Samsung 25R 18650 Cell — 2500mAh High Drain

1 × Teensy 3

positive logic

Pogo Pins "Spear Head" (10 pack) - P75-LM3 si7021 but included in the product)Pogo pins are little spring loaded contacts, very handy for making jigs, or making momentary (but electrically solid) contacts. We use them by the dozen for making programming and testing jigs but they're handy also if say you want to JTAG program a board that you cant solder headers to just shove these thin contacts into a 0. 1" pitch IDC programming cable and press it onto the contacts. These particular pins are (in our opinion) ideal because they