RISE R-01

Know when it peaks.

A small camera for your sourdough starter. It watches the jar and tells your phone at the rise you set.

Concept study · Rendered, not built

The RISE R-01 printed in Charcoal Black: the same slab with its round camera eye, orange status light and side vents. The RISE R-01: a small white printed slab with a single round camera eye on its face, an orange status light below it and vent slots high on its side.

Feed it. Mark the line. Walk away.

R-01 photographs the jar through the glass every 30 to 60 seconds. Your phone finds the top of the starter in each frame, draws the rise curve, and taps you on the shoulder when it reaches your target.

Design

Small enough to forget.

The R-01 seen from the front.
  1. One eye, on centre. The lens sits on the centreline, 58 mm up: the middle of a doubled starter.
  2. Breathes from below. Low slots feed the air sensor’s own pocket, below every heat source.
  3. Four screws, one flush button. Nothing glued, nothing sticking up.
  4. USB-C, and a vent up high. Charge from the side; warm air leaves at the top.
  5. 56 × 32 × 84 mm. About a deck of cards, standing up. Printed in one white PLA.
The white R-01 on a maple counter, its eye aimed at a glass jar of starter with an orange rubber band marking the starting level.

Set it beside the jar.

Any clear, straight-sided jar, about 12 cm from the lens. Mark the bottom and the starting line once in the app. Rendered scene.

How it works

Watch. Measure. Alert.

Illustrative rise curve The curve climbs from 1× at the start, crosses a dashed 2× target where an alert fires, peaks near six hours and starts to fall. Illustrative, not measured. 1× 2× 0 h4 h8 h Alert at 2×
Illustrative, not measured. Rise is an image-height proxy: it shows the starter climbing, not that it is ready to bake.
  1. 01

    Watch

    The OV2640 camera photographs the jar through the glass every 30–60 s.

  2. 02

    Measure

    Your phone finds the starter’s top edge and turns it into rise from your baseline. An SHTC3 reads room temperature and humidity.

  3. 03

    Alert

    Frames travel over local Wi-Fi to the app, with no cloud. Set 2×, or any target, and get a notification when it gets there.

Inside

Everything, in its place.

Exploded view: front tray, Freenove board with camera, battery, charge module, sensor, switch, rear tray and four screws.
  1. Two printed trays. Split down the middle, each printed on its broad face. No supports.
  2. Freenove ESP32-S3 + OV2640. Wi-Fi, PSRAM and the camera on one off-the-shelf board, held on centre behind the eye.
  3. 2,000 mAh cell. Stacked directly behind the board. Eight hours unplugged is the target, not yet measured.
  4. USB-C charge module + SHTC3. Charger low on the right; the air sensor in its own walled pocket, low on the left.
  5. Four M2 screws. Through the rear tray into brass heat-set inserts. Nothing glued.

Airflow

Honest air.

A warm box reads warm. The charge module alone can shed about 1.3 W while charging, enough to lift the inside 6–7 °C and skew humidity by a third.

So the SHTC3 lives below every heat source, walled off in its own pocket, fed through slots in the base and the left side. The rest of the case breathes as a chimney: in under the charger, out high on the right.

Estimates, not measurements. The prototype has to show the offset against a reference thermometer, plugged in and unplugged.

Airflow through the R-01, front view Room air enters the sensor pocket at the bottom left and leaves through the left side. Separately, air enters under the charge module at the bottom right, rises past the board and battery, and leaves through slots high on the right side. board + cell SHTC3 pocket charger
Front view, to scale. Arrows are illustrative.

Made to print

Front tray, rear tray and button cap, sized for a stock Ender-2 Pro. Every internal feature runs along the print direction, so nothing needs support.

Close-up of the R-01: the round eye with its debossed ring, the orange status light, the seam between the two trays and the vent slots on the side.
Two R-01s: one printed in Muted White in front, one in Charcoal Black behind it to the right.
Polymaker Matte PLA in Muted White or Charcoal Black.
  • 3printed parts
  • 0supports
  • 4M2 screws, brass inserts
  • 24°tip angle, est.
Exploded view on a studio sweep: the front tray, the board with its camera, the blue cell, the rear tray with its ribs and bosses, the button cap and the screws.
Rendered from the CAD model. Fit-checked in Blender against every bought part: no interferences. Not yet printed.

Tech specs

What it is meant to be.

Every line carries its status. None is validated yet.

  • Targeta requirement, not measured
  • Proposeda chosen part or method, not built
  • Modeledexists in CAD, not printed
Size
56 × 32 × 84 mm, plus 1.5 mm printed rails underneath Modeled
Enclosure
White PLA front tray, rear tray and flush button cap; four M2 × 8 screws into heat-set inserts Modeled
Camera
OV2640 on the Freenove ESP32-S3-WROOM CAM board; lens on the centreline, 58 mm up, about 119 mm from a 90 mm jar Proposed
Capture
One JPEG every 30–60 s over local Wi-Fi; no cloud service Proposed
Air sensor
Sensirion SHTC3 module in a walled, vented pocket below the electronics Proposed
Inference
Starter-edge segmentation in the phone app, not on the device Proposed
Battery
2,000 mAh 1-cell LiPo, PH2.0 lead; at least 8 h unplugged Target
Power
USB-C, 5 V only, through a 5 V 1 A charge/discharge module; runs plugged in Proposed
Controls
One flush button over a 6 × 6 mm switch; one 3 mm orange status light Proposed
Printer
Stock Ender-2 Pro, 165 × 165 × 180 mm, 0.4 mm nozzle; no supports Modeled

Status

What we don’t know yet.

Nothing is built. These are the questions the first prototype has to answer.

  • Can the camera read the jar?

    Residue, condensation and kitchen light may hide the starter’s edge.

  • Is the phone model good enough?

    Trained on fermentation videos, then device footage; target error within 5% of fill height.

  • Eight hours unplugged?

    Average current with capture and Wi-Fi is unmeasured.

  • Does the alert arrive?

    Locked, backgrounded and offline phones behave differently; iOS may need more than local Wi-Fi.

  • How honest is the air reading?

    The pocket is designed to read room air; the offset is untested.

  • Do the bought parts match?

    The cell and sensor module sizes are modelled from listings, not measured.

Waitlist

Be first to print one.

One email when the tested files and parts list are ready.

Downloads

Working files.

The STLs are untested concept files: the cell and sensor dimensions are not yet measured, so print fit coupons first. The engineering sheets are Rev C references and predate this enclosure.