Setpoint by Datum Labs

Wi-Fi temperature monitoring

Know the moment it crosses the line.

Setpoint watches your temperature around the clock and alerts you the instant it breaks a threshold you set — over Wi-Fi, straight to your phone. No hub. No gateway. No subscription to read your own data.

Rechargeable. USB-C, weeks per charge
FCC-certified radio module
Waterproof stainless probe
Setpoint · Probe 01
Nominal
°C
SETPOINT 40.0°C MIN MAX
● LIVE · 2.4 GHz RSSI −52 dBm · BATT 87%

Why Setpoint

Monitoring built to be trusted, not babysat.

01

No hub required

Talks to your Wi-Fi directly. Nothing extra to buy, plug in, or keep alive on your network.

02

Threshold alerts

Set a high and low limit per probe. Cross it and Setpoint tells you — the moment it happens, not on the next poll.

03

Own your data

A dashboard you run yourself. Per-probe min / max / average, full history, one-click CSV export.

04

Weeks per charge

A protected 18650 and deep-sleep firmware. Recharge over USB-C; a power switch stops shelf drain.

How it works

From probe to alert in three steps.

1

Place the probe

Drop the waterproof stainless probe wherever temperature matters — a fridge, a tank, a room, a rack. Add a humidity sensor on the expansion header if you need it.

2

Join your Wi-Fi

Power on and connect in the browser — no app-store download to get started. Setpoint remembers the network and reconnects on its own.

3

Set the line, walk away

Choose your safe range. Watch it live on the dashboard, and let the alerts do the watching when you can't.

Technical specification

The numbers behind the readout.

Sensing

Temperature range−55 … +125 °C
Temperature accuracy±0.5 °C
ProbeDS18B20 · waterproof
Humidity (optional)0–100 %RH · ±1.8%
ExpansionI²C header

Power

Cell18650 · protected
ChargingUSB-C · ~1 A
Battery lifeweeks–months*
Power switchhard on / off

Connectivity

RadioWi-Fi 2.4 GHz b/g/n
ControllerESP32-C3 (RISC-V)
Setupbrowser · captive portal
Firmware updateflash from browser

Software & compliance

Dashboardself-hosted · Win/macOS
Alertsper-probe high / low
ExportCSV · date range
Radio moduleFCC-certified

* Battery life scales with reporting interval and Wi-Fi conditions; figures confirmed during hardware validation. Specs reflect rev-2 hardware and are subject to change before general availability.

Pick your build

Three ways to run Setpoint.

Every unit is the same rev-2 board — choose how it's powered and how much you want to build yourself.

Fixed

Setpoint USB

$59 est.
Always-on spots with power nearby — racks, benches, enclosures.
  • Assembled & tested board
  • Waterproof temperature probe
  • USB-C powered, runs indefinitely
  • Enclosure + mounting
Reserve
Portable · most popular

Setpoint Battery

$69 est.
Anywhere, wire-free — fridges, coolers, vehicles, remote rooms.
  • Everything in USB, plus:
  • Protected 18650 installed
  • Weeks–months per charge
  • Recharge over USB-C
Reserve a unit
Maker

DIY Kit

$34 est.
Solder it yourself, flash it, make it yours. Bring your own cell.
  • Bare carrier board + parts
  • Open firmware, flash in browser
  • Full build guide
  • Battery not included*
Notify me

Pricing is indicative for launch and not a final offer. *DIY kits ship without a lithium cell; use a protected cell for safety.

Where it earns its keep

One probe, a lot of things worth not losing.

Cold chain & fridges
Server rooms & racks
Greenhouses & grow tents
Fermentation & brewing
Reptile & aquarium
Wine & cellars
Freezers & labs
Vacation homes & pipes

Be first to deploy Setpoint.

Rev-2 units are in production now. Join the list for launch pricing, ship dates, and first access to the DIY kit.

No spam — launch updates only. One email, then you decide.