FS-Δ1 · field unit · v0.7
The smallest weather station we could justify.
One enclosure, five sensing channels, a 3.4-watt solar panel, and a LiFePO₄ cell sized to outlive its own electronics. Mount it, walk away, and read the data from anywhere.
Pricing · expected Q2 2026
$349USD est.
One-time. No subscription for data access. We're a small team — the waitlist sets manufacturing order quantity.
Spec sheet
Built for places without people.
Enclosure
- Rating
- IP67
- Material
- UV-stable polycarbonate
- Dimensions
- 182 × 92 × 64 mm
- Mass
- 412 g
- Mount
- M8 / ¼-20 / strap
Power
- Solar
- 3.4 W mono-Si, glass-laminated
- Battery
- LiFePO₄ 18650 · 6.4 Wh
- Idle draw
- 0.8 mA
- Active draw
- 180 mA peak
- Autonomy
- >21 days dark
Sensing
- Camera
- 2 MP RGB · IR-cut · 110° FOV
- Temp
- −40 to +85 °C · ±0.2 °C
- Air quality
- PM2.5 · PM10 · VOC
- Audio
- MEMS · 25 Hz–20 kHz · 16-bit
- Solar telem.
- Vin · W · battery state
Connectivity
- Primary
- LoRaWAN (EU868/US915/AS923)
- Optional
- LTE-M / NB-IoT (Cat-M1)
- Local
- BLE 5 (provisioning)
- Storage
- 16 GB µSD · 90-day buffer
Compute
- MCU
- ESP32-S3 dual-core 240 MHz
- RAM
- 512 KB SRAM + 8 MB PSRAM
- Firmware
- fs-os · MIT licensed
- OTA
- Signed deltas, opt-in
Data
- Format
- JSON over MQTT / HTTP POST
- Ownership
- You. Always.
- API
- Public read · CC BY 4.0
- Self-host
- Supported · docker-compose
In the box
- ▸FS-Δ1 unit, assembled & calibrated
- ▸M8 stainless mounting hardware
- ▸1.5 m UV-stable strap
- ▸Provisioning card with QR + station ID
- ▸Spare gasket set
- ▸Quick start (printed, recyclable)