Component List

Resistors

R1 = see text

R2..R4 = 1 M; 1/4 W

R5 = 680 Ω; 1/4 W

R6..R8 = 360 Ω; 1/4 W

Semiconductors

D1 = LED blue

D2 = LED red

D3 = LED yellow

D4 = LED green

Boards

2 × TPL5111 breakout boards (Adafruit Industries)

1 × Raspberry Pi Pico

1 × Artemis Thing Plus (Sparkfun)

1 × Artemis Nano (Sparkfun)

2 × BME280 breakout boards (ASIN B08DHTGNHR *)

1 × FTDI basic breakout 3.3 V (Sparkfun)

3 × HopeRF RFM95CW 915 MHz FCC Certified LoRa Transceiver (Anarduino.com)

1 × Arduino Pro Mini, 3.3 V 8 MHz (see text)

Other

2 × ST 4 pin Connector (ASIN B01DUC1M2O*; see Building Notes)

1 × 4.2’’ ePaper Display (WaveShare; ASIN B074NR1SW2*)

3 × double sided FR4 perf boards 7 X 9 cm (ASIN B08F7X8JHV*)

2 × 18560 LiPo rechargeable batteries

2 × battery holders for 18650 batteries

Epoxy Resin kit (ASIN B07TVWTG829*)

USB-C 90° adapter (ASIN B0BBVWF54L*)

Headers and wires as needed

* ASIN codes refer to searchable Amazon inventory numbers.