Building a SpoolmanScale¶
This section takes you from a pile of parts to a working scale. If you already have one, you want Updating the firmware instead.
The five steps¶
| Step | What | Where |
|---|---|---|
| 1 | Buy the parts | Bill of materials |
| 2 | Print the case | Printing the case |
| 3 | Wire it up | Wiring |
| 4 | Put it together | Assembly |
| 5 | Flash and set up | Flashing & first setup |
What you need¶
- A WT32-SC01 Plus - ESP32-S3 with a 3.5" display
- A PN532 NFC breakout board
- A NAU7802 scale ADC
- A 2 kg load cell (5 kg works too)
- A 3D printer for the enclosure
- A USB-C data cable and a 5V supply
Exact parts, links and prices on the bill of materials. Reckon on €50 to €60 in total.
How long it takes¶
| Phase | Time |
|---|---|
| Ordering parts | 6 to 15 days, most ship from China |
| Printing the enclosure | 4 to 6 hours |
| Wiring and assembly | about 2 hours |
| Flashing and setup | about 20 minutes |
How hard it is¶
Skill level
You need basic soldering - the PN532 has no connector, its wires are soldered directly - and enough comfort to flash an ESP32 from a browser. No programming: the firmware is pre-built.
This is a beta build guide
Hardware batches vary. If something is unclear or does not fit yours, report it on Discord or on MakerWorld.