Bill of Materials

Select your preferred vendor for each component to calculate your build cost.

ComponentVendor / PartQtySubtotal

ESP32-S3

Microcontroller

Adafruit ESP32-S3 Feather — AdafruitSparkFun Thing Plus ESP32-S3 — SparkFunArduino Nano ESP32 — ArduinoGeneric ESP32-S3 DevKit — AliExpress

×1

$17.95

Bosch BME688

Gas / temp / humidity sensor

Adafruit BME688 Breakout — AdafruitSparkFun BME688 Breakout — SparkFunPimoroni BME688 Breakout — PimoroniGeneric BME688 Module — AliExpress

×1

$19.95

Bosch BMV080

Particulate matter sensor

SparkFun BMV080 Breakout — SparkFunBMV080 Eval Kit (official) — BoschBMV080 bare module — Mouser

×1

$34.95

Blues Notecard

LTE-M cellular module

Notecard Cell (global) — BluesNotecard Cell+WiFi — BluesNotecard via DigiKey — DigiKey

×1

$49.00

Notecarrier

Breadboard builds only; the carrier PCB has an M.2 socket

Not needed (carrier PCB) — NoneNotecarrier-B — BluesNotecarrier-A — Blues

×1

$0.00

PCB / Prototyping

Circuit board

Breadboard (prototyping only) — BreadboardPerma-Proto half-size protoboard — AdafruitSparkFun ProtoBoard — SparkFunWildfire Alarm carrier PCB (JLCPCB, 5-pack) — JLCPCBWildfire Alarm carrier PCB (PCBWay, 5-pack) — PCBWay

×1

$3.95

Battery

Power supply

LiPo 10,000 mAh — Adafruit18650 pack 10,000 mAh — Amazon18650 pack 10,000 mAh — AliExpress

×1

$29.95

Solar panel

Optional — 6V 2W

Skip (battery only) — None6V 2W Solar Panel — Adafruit6V 2W Solar Panel — AliExpress

×1

$0.00

Charge controller

TP4056 with protection

Adafruit LiPo Charger (USB-C) — AdafruitTP4056 module (5-pack) — AliExpress

×1

$6.95

Enclosure

3D printed (PLA/PETG)

Print yourself (~100g filament) — Self-printOrder from JLCPCB 3D print — JLCPCBOrder via Craftcloud — Craftcloud

×1

$2.50

Estimated total (1 node)

$55.25 above minimum possible cost

$165.20

Prices are estimates and may vary. Always check current listings before ordering.

Rev A carrier board

The rev A carrier PCB takes an Arduino Nano ESP32 and a 12 V supply, for example a 12 V LiFePO4 battery behind a solar charge controller with a load output. The battery, solar and charger rows above describe a LiPo breadboard build and do not match rev A yet. The exact rev A board BOM (LCSC part numbers) is in hardware under pcb/fire-detection-device/fabrication/.