EndGauge

How it fits together

EndGauge, part by part

Scroll or tap a part. Press “See the 3D CAD design” to watch the model, built from our CAD, light each part up and show how it connects.

See the 3D CAD designShow the concept

Real-time 3D render · drag to rotate · final design may varySwipe sideways to rotate

1. 01

   The whole EndGauge

   A solar box on the last span reads end-of-pivot pressure and position, checks spray and crop ahead, and texts you when something is wrong.

2. 02Brain

   DPTechnics Walter

   The brain: it runs the endgauge-fw program

3. 03

   Pressure transducer

   Reads water pressure at the end of the pivot

   DPTechnics Walter · 0.5–4.5 V analog lead · Pressure voltage

4. 

   04

   Spray camera

   Checks each last-span nozzle is spraying, then reports

   XIAO ESP32S3 Sense · UART · Spray flags and small crops

5. 05

   Thermal camera

   Looks ahead for hot or dry patches in the crop

   DPTechnics Walter · I²C (4 wires) · 32 x 24 temperature frame

6. 06

   GNSS position

   Gives the pivot angle and speed from the pipe

   DPTechnics Walter · GNSS antenna lead · Satellite signal

7. 07

   Charger and cells

   Charges two 18650 cells and runs the box day and night

   DPTechnics Walter · Power leads · Battery power

8. 

   08

   Solar panel

   Keeps the cells full and shades the box

   DPTechnics Walter · Panel lead to charger · 6 V solar power

9. 09

   All connected

   7 key parts, one program, and your phone

The idea

The pressure gauge at the far end of a centre pivot, made smart: end pressure, stops, weak sprays and canopy hot spots on the phone

How the parts connect

EndGauge, wired up

Every part, what links it to the brain, and how the data reaches your phone. A solid line is a cable; a dashed line is a radio link.

The program

What controls EndGauge

for (;;) {
    psi = adc_to_psi(adc_read(PRESSURE_PIN));     // 0.5-4.5 V
    if (every_s(60)) fix = gnss_get_fix();
    v = speed_from_fixes(fix, last_fix);
    state = classify(psi, v);                     // RUNNING WET, STOPPED WET ...
    spray = uart_read_spray(camera);              // plume ratio per drop
    ring_store(fix.angle, mlx90640_columns());    // 32 column means
    if (state != last_state || spray.flagged || every_s(300))
        lte_publish("eg/ID/state", state_json(state, psi, fix));
    light_sleep(10);
}

To your phone

How the data reaches EndGauge

Phone browser or SMS

1. Pivot box
2. LTE-M or NB-IoT · MQTT/TLS
3. IEMI cloud
4. Push and SMS
5. Phone

Key specs

Targets for production units; they may change during development.

Pricing

Target pricing. Estimated BOM about $479 at qty 1 with the Honeywell PX3 transducer, about $372 with a generic transducer and about $230 at qty 100.

Indicative launch pricing in USD, excluding taxes and shipping. Final pricing is confirmed before any balance is charged.

1. 28 Oct 2026, 16:25LatestA farmer with an older or mixed-brand centre pivot needs end pressure checked at the far end, a stopped-wet alert at night and broken nozzles near the end found fast; one broken nozzle about 1,000 ft out costs $600 to 1,000 of corn (University of Minnesota Extension, sources in DESIGN.md).

   • Drawn idea plan (idea.json): a quarter-section corn field from above with the pivot centre and pump, the arm and its four towers, the direction of travel, a dry spot on a knoll and the farmyard; pins for the box on the last span, the pressure tee at the end, the thermal pod on the leading side and the owner's phone
   • The product picture is now this drawn plan instead of the plain fallback card; drawn from the rev A design notes, not the CAD
   • What we kept from the market work: stopped-wet and GPS alerts already sell for about $299, so they stay as table stakes and the design puts its effort into the pressure trend, the spray check and the hot-spot ring
   • Next: drawn plans for more catalogue products that still show the fallback card

   See it in 3DFull research and design

2. 25 Oct 2026, 15:27Stopped-wet and GPS alerts already sell for $299 (Pivot Watch) → kept as table stakes; effort goes into the pressure trend, spray check and thermal ring

   • New design: 4 printed parts in code CAD, bought parts fit-checked
   • Market research, hardware list and use case written up
   • Design page and kit render published
   • Product page added

   See it in 3DFull research and design