AutoLee

Automated Lee APP conversion — ESP32-C6 firmware with touchscreen UI and web control.

AutoLee converts a manual Lee APP into a fully automated decapping machine using a stepper motor, sensorless homing, and StallGuard jam detection. It runs on a tiny 1.47" touchscreen ESP32-C6 module and can also be controlled from any phone/computer via its built-in web interface.

Find the 3D-printable parts here: https://makerworld.com/en/models/2529369-autolee-conversion-kit

Support my work: https://buymeacoffee.com/kl.design

By K.L Design

Two power versions

Version	Status	Summary
36 V	Recommended	36 V motor supply, XT60 input, enclosed open-frame PSU. The higher supply voltage gives the motor more torque, so the press is stronger and handles load better.
24 V	Supported	The original build — 24 V 5 A power brick and DC jack. Still fully supported by the same firmware.

Both versions run the same firmware — no build flags or settings to change. The MakerWorld listing contains the parts for both, including a dedicated 36 V print profile and the PSU casing.

⚠️ SAFETY WARNING — READ BEFORE BUILDING OR OPERATING

This machine will crush fingers and hands without breaking a sweat. It is a motorized press driven by a NEMA 23 stepper motor with significant torque. It does not know or care if something is in the way.

NEVER run this machine unattended.
NEVER allow children near the machine, whether it is running or not.
Keep your hands and fingers away from the machine at ALL times when it is powered on.
Treat it like any industrial press — it can and will cause serious injury if misused.

The stall detection and jam protection features are designed to detect brass getting stuck in the machine — nothing more. They will not detect or protect your fingers and hands. They were never designed for that. And even for brass jams, they can fail, be misconfigured, or react too slowly. Do not rely on software to protect your body.

⚡ MAINS VOLTAGE WARNING — 36 V VERSION

The 36 V version uses an open-frame power supply with exposed screw terminals for 230 V AC mains. Mains voltage can kill you. Mistakes in this wiring can cause electric shock, fire, and death.

Only do the mains wiring if you know exactly what you are doing. If you are in any doubt, have a qualified electrician do it.
Follow all local laws and regulations for mains wiring where you live.
Never work on the PSU while it is plugged in. Unplug it and wait before touching anything — open-frame supplies can hold a dangerous charge in their capacitors after being disconnected.
Always connect protective earth to the PSU's earth (⏚) terminal.
Never power the PSU unless it is fully closed inside its printed casing. Never run it open on the bench.
Use strain relief on the mains cable. Crimp ferrules on clamp terminals, insulated fork or ring terminals on screw terminals, and fully insulated female spade connectors on the C14 inlet tabs — no bare, tinned or loose strands.
Set the PSU's input voltage selector to match your mains before first power-on — 230 V in Europe, 110 V in the US. Set to 110 V and plugged into 230 V, the PSU will be destroyed.
Double-check every connection before plugging in for the first time.

LIABILITY DISCLAIMER: This project is provided as-is with absolutely no warranty of any kind. The author(s) accept no responsibility or liability for any injury, death, damage, or loss resulting from building, modifying, wiring (including mains wiring), or operating this machine. You build and use it entirely at your own risk.

Features

Motion & Calibration

Sensorless calibration — automatically finds the UP and DOWN mechanical stops using TMC5160 StallGuard, no limit switches needed
Adjustable endpoints — fine-tune UP and DOWN positions in ±1/10/100 step increments after calibration
Fast ramp profile — 800,000 steps/s² accel/decel (RUN_DECEL) for maximum cruise time and StallGuard coverage
Safe return-home — after a jam or stall, creeps back to the UP stop at calibration speed with stall detection
Calibrate after every power-up — calibration is deliberately not saved, because the motor's position reference is lost when power is removed (including after an E-stop)

Speed Profiles

Three preset profiles — Slow (15 kHz), Normal (30 kHz), Fast (40 kHz)
Per-profile StallGuard trip — SG readings depend heavily on speed, so each profile has its own trip value
One-tap switching — change profile from the touchscreen or web UI; a switch while running is applied cleanly at the next direction change

Auto SG (jam detection setup)

Automatic trip measurement — runs 12 strokes per profile with detection off, records the highest SG reading and sets each trip to that value + 1
Press lockout — the press will not run until all three trips are set (by Auto SG or by hand). Trips ship as 0 because the right values depend on the individual machine: supply voltage, motor, current, and mechanics
Stays valid only for the conditions it measured — the trips are stored together with the run current and profile speeds. Changing the current or work zone logs a reminder to re-run Auto SG; a firmware update that changes a profile speed clears that trip and locks the press until Auto SG is run again
Floor warning — if a profile's SG only ever read at the floor (0/1), it is flagged JAM DETECT LIMITED on the display and web page, since detection there is limited

Motor Current

Adjustable run current — 1,000–4,500 mA via web slider (default 3,500 mA)
Overcurrent warning — values above 4,000 mA show a warning (exceeds motor rating, ensure cooling)
Live adjustment — takes effect immediately, no restart needed

Jam Detection & Protection

Runtime StallGuard monitoring — reads SG2 via median-of-5 filtered SPI during operation
Polarity note — on this machine SG_RESULT rises under load, so a jam is detected when SG goes above the trip. Lower trip = more sensitive, 0 = off. This is the opposite of the TMC5160 datasheet, and it is intentional
Consecutive-reading confirmation — two consecutive high readings are required to declare a jam (rejects single spikes)
Work zone blanking — skips SG monitoring near the DOWN endpoint where primer seating resistance is normal
Accel/decel blanking — ignores SG during speed transitions
Automatic backoff — on jam detection, the motor stops and backs off 1,000 steps before showing the jam screen
Jam recovery screen — one-button return-home using the same sensorless homing as calibration
Per-stroke logging — min/max SG for every stroke is logged, and the last stroke's values are shown on the web Configuration page

Batch Run

Set a target count (1–9999, 0 = off) and the machine stops automatically when done
Progress display — remaining count shown on the main screen during batch operation
Works with all profiles — batch runs at whatever speed profile is active

Counter

Stroke counter — counts each completed down-up cycle, displayed large on the main screen (display caps at 9999; batch counting is not affected by the cap)
Resettable from touch UI or web interface

Settings Persistence

Profile, SG trips, run current, work zone, endpoint offsets, batch target, counter and WiFi on/off are saved to flash automatically
Saves happen only while idle, so a continuous run never writes flash

Touch UI (172×320 LVGL)

Main screen — counter, active speed profile, status warnings (NOT CALIBRATED / RUN AUTO SG / JAM DETECT LIMITED), batch remaining, RUN/STOP, Batch Run and Settings buttons
Settings — Calibrate, Auto SG, Config, Reset Count
Config — Speed, Endpoints, Stall Guard, WiFi Info
Speed — three profile buttons with the active one highlighted, info card showing Hz + SG trip, warning symbol on floor-limited profiles
Endpoints — raw and effective endpoint values, buttons to edit UP and DOWN (±1/10/100)
Stall Guard — adjust the SG trip for the active profile with ±1/±5 buttons
Batch Run — set target count with ±1/10/100 buttons, start batch
Jam screen — warning display with one-button return home
WiFi — shows SSID and IP, WiFi on/off switch, Reset WiFi button

Web Interface (5-page layout)

Full control from any browser — responsive dark-theme UI works on phone and desktop
Real-time updates — Server-Sent Events (SSE) push state changes at 250 ms intervals
Main page — status, counter, RUN/STOP, jam recovery, calibrate, reset counter, batch run controls, speed profile selector
Configuration page — motor current slider (1,000–4,500 mA with overcurrent warning), endpoint tuning, per-profile SG trip inputs with last-stroke min/max SG, Auto SG, work zone adjustment
Log page — 300-line scrollable log with real-time streaming and clear button
Firmware page — drag-and-drop OTA .bin upload with progress bar
WiFi page — connection status, SSID and IP, change credentials, reset to AP mode, radio on/off
Footer navigation — links on every page to jump between all five pages

WiFi & Networking

Off by default on a new install — turn it on from the touchscreen (Settings → Config → WiFi Info → WiFi On). Turning WiFi on reboots the device (~2 s); turning it off is immediate
Auto-connect — attempts saved credentials on boot, falls back to AP if it fails
Captive portal — open AP mode (AutoLee-Setup, no password) with DNS redirect so any device gets the setup page automatically
Network scanner — scans available WiFi networks and presents them in a dropdown
Auto-reconnect — monitors the connection and reconnects if the network drops
ArduinoOTA support — update firmware from PlatformIO/Arduino IDE over the network (hostname: autolee, password: autolee)

Power

36 V version — 36 V motor supply via XT60, stepped down 36 V → 24 V (fan, driver 24 V pin) → 5 V (ESP32-C6)
24 V version — 24 V via DC jack, stepped down 24 V → 5 V
Power switch and E-stop in series on the main supply line — the E-stop cuts all power to the machine, motor and logic

File Structure

The firmware is split into modular files for maintainability. All files must be in the same sketch folder.

File	Purpose
`AutoLee.ino`	Main entry point — globals, `setup()`, `loop()`, settings persistence, include order, changelog
`config.h`	All tuning constants, pin definitions, speed profiles
`motion.h`	Motion control, stall detection, calibration, Auto SG, creep home
`ui_touch.h`	LVGL touch UI — screen builders, helpers, event handlers
`web_server.h`	Web server, API endpoints, SSE broadcast, HTML, OTA upload
`wifi_ota.h`	WiFi connection, supervision, captive portal, ArduinoOTA
`lv_conf.h`	LVGL configuration — display size, memory pool, enabled features, font selections

The Arduino IDE compiles everything as a single translation unit. Include order in AutoLee.ino resolves all dependencies: config.h → globals → motion.h → ui_touch.h → wifi_ota.h → web_server.h.

Bill of Materials

Support this project: The Amazon links below are affiliate links. If you purchase through them, I earn a small commission at no extra cost to you — it's a simple way to help fund continued development of AutoLee. Thank you!

Common Parts (both versions)

Electronics

#	Component	Specs	Link
1	WaveShare 1.47" ESP32-C6	Touchscreen controller & UI	Amazon.se · Amazon.com
2	TMC5160T Plus	Silent stepper driver with StallGuard2 (8–60 V)	Amazon.se · Amazon.com

Mechanical

#	Component	Specs	Link
3	NEMA 23 Stepper Motor	2.4 Nm, 4.0 A, 57×57×82 mm, 8 mm shaft	Amazon.se · Amazon.com
4	Shaft Coupling	Motor-to-leadscrew (8 mm to 10 mm)	Amazon.se · Amazon.com
5	Ball Screw Kit SFU1605 250 mm	250mm SFU1605 BK12/BF12 10 mm Shaft	Amazon.de · Amazon.com

Controls

#	Component	Specs	Link
6	On/Off Switch	Panel mount	Amazon.se · Amazon.com
7	Emergency Stop	Button	Amazon.se · Amazon.com

Cooling

#	Component	Specs	Link
8	Fan	24 V, 40×40×20 mm	Amazon.se · Amazon.com

Wiring Supplies

#	Component	Specs	Link
9	Silicone Wire	18 AWG, power wiring (PSU → driver, step-downs)	Amazon.com
10	Silicone Wire	24 AWG, flexible stranded, signal wiring	Amazon.com
11	Dupont Connector Kit + Crimping Tool	2.54 mm connectors, housings, and ratcheting crimper	Amazon.com
12	Ferrule Connector Kit + Crimping Tool	For power and motor wires to the TMC5160 clamp terminals	Amazon.com
12b	Insulated Fork Terminals + Female Spade Connectors (36 V version)	Forks for the PSU screw terminals (size to the terminal screw; flanged/locking type recommended). Fully insulated female spades for the C14 inlet tabs (size to the tabs, typically 4.8 or 6.3 mm)	Amazon.se · Amazon.com

36 V Version — Additional Parts (recommended)

#	Component	Specs	Link
13	Power Supply	36 V, 10 A, open frame (enclosed in printed PSU casing). Set the input voltage selector to your mains voltage before powering up	Amazon.se · Amazon.com
14	IEC C14 Panel Inlet	Mains inlet for the PSU casing	Amazon.se · Amazon.com
15	Mains Power Cable	3-core earthed, IEC C13 plug, wall plug for your country	Amazon.se · Amazon.com
16	XT60 Connectors	Panel-mount male on AutoLee, female on the PSU lead	Amazon.se · Amazon.com
17	Step-down 36 V → 24 V	Adjustable buck converter — must be set to 24 V before connecting loads	Amazon.se · Amazon.com
18	Step-down 24 V → 5 V	Pololu #5267	Electrokit · DigiKey
19	Mains-rated wire	C14 inlet → PSU L/N/⏚ inside the casing. Flexible single-core, 0.75–1.0 mm² (18 AWG), rated ≥300 V (EU: H05V-K / H07V-K; US: UL1015 600 V). Brown (L), blue (N), green/yellow (⏚)	Amazon.se · Amazon.com

C13 vs C14: the panel-mount socket on the PSU casing is an IEC C14 inlet. The power cable that plugs into it has a C13 plug (a standard "computer/kettle" style cable).

XT60 orientation: put the female XT60 on the PSU lead (the side that is live) and the male panel connector on the AutoLee, so no live pins are ever exposed.

24 V Version — Additional Parts

#	Component	Specs	Link
20	Power Supply	24 V, 5 A DC	Amazon.se · Amazon.com
21	DC Power Jack	2.5 mm socket	Amazon.se · Amazon.com
22	Buck Converter	24 V → 5 V	Amazon.se · Amazon.com

Hardware (Fasteners & Inserts)

Bolts / Screws

Qty	Size	Used For
15 pcs	M4 x 16mm	Motor, Motor mount, Backplane upper, Backplane lower
11 pcs	M5 x 40mm	Ballscrew mounts, Sled clamp
4 pcs	M5 x 25mm	Sled mount
1 pcs	M4 x 20mm	Display mount
4 pcs	M3 x 30mm	24V Fan
4 pcs	M3 x 5mm	TMC5160T
1 pcs	M3 x 10mm	Driverhousing mounting to backplane
2 pcs	M3 x 10mm	Driverhousinglid
4 pcs	M2 x 5mm	Display

Lock Nuts

Qty	Size	Used For
3 pcs	M5 Lock nut	Sled clamp
4 pcs	M3 Lock nut	24V Fan

Heat Inserts

Qty	Size	Used For	Link
16 pcs	M4 Heat insert	Motor, Motor mount, Backplane upper, Backplane lower, Display mount	Amazon.se · Amazon.com ¹
8 pcs	M5 Heat insert	Ballscrew mount	Amazon.se · Amazon.com ¹
5 pcs	M3 Heat insert	TMC5160T mount, Driverhousing to backplane	Amazon.se · Amazon.com ¹

¹ The US link is a bundle kit that includes M3, M4, and M5 inserts.

36 V Version — Additional Fasteners

The 36 V version uses the same hardware as above (the XT60 mount replaces the DC jack mount), plus:

Qty	Size	Used For
2 pcs	M3 x 8mm	36 V → 24 V step-down
2 pcs	M3 Heat insert	36 V → 24 V step-down

Wiring

ESP32-C6 → TMC5160T Plus (SPI) — both versions

ESP32-C6 Pin	TMC5160 Pin	Function
GPIO 1	SCK	SPI Clock
GPIO 2	SDI (MOSI)	SPI Data In
GPIO 3	SDO (MISO)	SPI Data Out
GPIO 8	CS	SPI Chip Select
GPIO 4	EN	Enable (active low)
GPIO 5	STEP	Step pulse
GPIO 6	DIR	Direction
GPIO 7	DIAG1	StallGuard diagnostic output
3V3	VIO	Logic voltage
GND	GND	Logic ground

Important: The display and TMC5160 share the SPI bus (GPIO 1, 2). The firmware manages chip-select lines (GPIO 8 for TMC, GPIO 14 for display) to avoid bus conflicts. The display CS is forced high before every StallGuard SPI read.

Power — 36 V Version (recommended)

Connection	Details
Mains 230 V → C14 inlet → PSU L / N / ⏚	Inside the PSU casing only — see the mains warning above
PSU 36 V → XT60	18 AWG lead from PSU casing to the AutoLee
XT60 → On/Off switch → E-stop	Main supply line into the machine
36 V → TMC5160 HVIN (8–60 V)	Motor power
36 V → 36→24 V step-down IN
24 V → Fan	Direct 24 V to cooling fan
24 V → TMC5160 drive connector 24V pin	Must come from the 24 V rail — never 36 V
24 V → Pololu 24→5 V IN
Pololu 5 V OUT → ESP32-C6 5 V	Logic power
GND	Common ground between all boards

⚠️ Set the 36 V → 24 V step-down before connecting anything to it. The module is adjustable and may not arrive set to 24 V. Power it from 36 V with no load connected, measure the output with a multimeter, turn the trim pot until it reads 24.0 V, and only then connect the fan, the Pololu and the TMC5160 24V pin. A mis-set step-down can put up to 36 V on parts rated for 24 V.

⚠️ TMC5160 24V pin: BIGTREETECH specifies that the voltage on the driver's control-connector 24V pin must not exceed 24 V, whatever the motor supply voltage — exceeding it damages the driver. Only the HVIN terminal takes 36 V.

Power — 24 V Version

Connection	Details
24 V PSU → DC jack → On/Off switch → E-stop	Main supply line into the machine
24 V → TMC5160 HVIN	Motor power (24 V)
24 V → TMC5160 drive connector 24V pin
24 V → Buck converter IN	Feeds the buck converter
Buck converter OUT (5 V) → ESP32-C6 5 V	Logic power
24 V → Fan	Direct 24 V to cooling fan
GND	Common ground between all boards

Software Setup

Dependencies (Arduino / PlatformIO)

Library	Version	Install	Purpose
`LVGL`	v8.4.0	Online	Touchscreen UI framework
`GFX_Library_for_Arduino`	v1.5.9	Online	ST7789 display driver
`TMCStepper`	—	Online	TMC5160 SPI communication
`FastAccelStepper`	—	Online	Step pulse generation with acceleration
`ESPAsyncWebServer` + `AsyncTCP`	—	Online	Web server & SSE
`ArduinoOTA`	—	Online	Over-the-air firmware updates
`DNSServer`	—	Online	Captive portal redirect
`esp_lcd_touch_axs5106l`	—	Offline	AXS5106L touch controller driver

Note: The esp_lcd_touch_axs5106l library is not available in the Arduino Library Manager. You must install it manually from Waveshare's demo package — see step 3 below.

Build & Flash

Clone this repo
Install all "Online" libraries above via the Arduino Library Manager
Install the touch driver offline:
- Download the Waveshare ESP32-C6-Touch-LCD-1.47 demo package
- Find the esp_lcd_touch_axs5106l library folder inside the package
- Copy it to your Arduino libraries directory
Set up LVGL:
- Copy lv_conf.h from this repo to sit next to your lvgl library folder (not inside it)
- Copy the demos folder from inside the LVGL library into its src folder
Open AutoLee.ino in Arduino IDE or PlatformIO — all .h files must be in the same folder as the .ino
Select board: ESP32-C6
Set partition scheme: Minimal SPIFFS (1.9 MB APP with OTA/190 KB SPIFFS) — the firmware is too large for the default partition layout
Compile and flash

Flash Pre-Compiled Binary (No Arduino IDE Required)

If you don't want to set up the Arduino IDE and compile the firmware yourself, you can flash a pre-built binary directly to the ESP32-C6 using a web browser.

What You Need

A Chrome or Edge browser (Web Serial is not supported in Firefox or Safari)
A USB-C cable connected to the Waveshare ESP32-C6 board
The merged firmware .bin file from the latest release

Steps

Download AutoLee.vX.XX_merged.bin from the Assets section of the latest release
Open the Espressif Web Flasher in Chrome or Edge
Click Connect and select the port for your ESP32-C6
In the Program section, enter 0x0 in the Flash Address field
Click the file picker next to the address and select the downloaded .bin file
Set Flash Mode as dio and Flash Size as 4MB
Click Program
Wait for flashing to complete — progress will show in the Console section at the bottom
After programming is complete click the rst button on the esp32 board to reboot
System should now be online

Tip: If the board doesn't show up as a COM port, hold the BOOT button on the Waveshare board while plugging in USB, then release after connecting. You may also need to install the CH343 USB driver if your OS doesn't recognize the board.

Updating Firmware Later

Once AutoLee is on your WiFi, go to the web UI → Firmware page and drag-and-drop the update file, AutoLee.vX.XX_update.bin from the latest release (not the merged binary). Check the release notes first: some updates require re-running Auto SG. The merged binary is only needed for the initial USB flash.

OTA Updates

After first flash, firmware can be updated two ways:

Web UI — open the AutoLee web interface, go to the Firmware page, drag and drop the AutoLee.vX.XX_update.bin file
ArduinoOTA — hostname autolee, password autolee

First-Time Setup

(36 V version) Set the PSU's input voltage selector to your mains voltage (230 V Europe / 110 V US), and set the 36 V → 24 V step-down to 24.0 V before connecting its loads — see Power — 36 V Version.
Power on. The main screen shows NOT CALIBRATED.
Enable WiFi (optional). WiFi is off on a new install. Go to Settings → Config → WiFi Info → WiFi On — the device reboots and starts the AutoLee-Setup captive portal if no network is saved. Connect to it and choose your network.
Calibrate. Settings → Calibrate. The press finds its UP and DOWN stops. This has to be done after every power-up.
Run Auto SG. Empty the press first — nothing is detecting while it measures. Settings → Auto SG (or the Configuration page on the web). It takes about a minute and sets the jam detection trip for all three profiles. The press stays locked until this has been done once.
Run.

Re-run Auto SG whenever you change the supply voltage (e.g. converting from 24 V to 36 V), the run current, the work zone, or the mechanics. The trips are only valid for the conditions they were measured under.

Configuration

Key constants are in config.h:

Constant	Default	Description
`profiles[0]` (Slow)	15,000 Hz / trip 0	Low speed — trip set by Auto SG
`profiles[1]` (Normal)	30,000 Hz / trip 0	Balanced — trip set by Auto SG
`profiles[2]` (Fast)	40,000 Hz / trip 0	High speed — trip set by Auto SG
`RUN_CURRENT_MA`	3,500 mA	Motor run current (adjustable 1,000–4,500 via web UI)
`RUN_DECEL`	800,000	Accel/decel rate (steps/s²)
`CAL_CURRENT_MA`	3,200	Calibration current (mA, fixed)
`CAL_SPEED_HZ`	8,000	Calibration speed (Hz)
`SGT_VALUE`	−1	StallGuard threshold (COOLCONF.SGT), shared by run, calibration and homing
`SG_FILTER`	false	StallGuard filter — must stay off; it averages away the short load spike
`RUN_SG_TRIP_NEEDED`	2	Consecutive high SG readings needed to declare a jam
`RUN_BACKOFF_STEPS`	1,000	Steps to back off after a jam
`SG_AUTO_STROKES`	12	Strokes measured per profile during Auto SG
`SG_AUTO_MARGIN`	1	Auto SG trip = measured max + this
`SG_WORK_ZONE_STEPS`	5,500	SG blanking zone near DOWN endpoint (adjustable via web UI)
`DOWN_OFFSET_DEFAULT`	−500	Default DOWN endpoint offset after calibration
`LOG_LINES`	300	Log buffer size

SG polarity: a jam is sg > trip — lower trip = more sensitive, 0 = off. This is the opposite of the TMC5160 datasheet and was confirmed on the machine; following the datasheet broke jam detection in v1.11–v1.19. Don't "fix" it.

API Reference

/api/state is GET; all other endpoints are POST.

Endpoint	Parameters	Description
`GET /api/state`	—	Returns full JSON state
`/api/toggle_run`	—	Start or stop running
`/api/profile`	`idx=0\|1\|2`	Switch speed profile
`/api/sg_trip`	`value=N` or `delta=N`, `&profile=N` (optional)	Set or adjust SG trip (0–1023); targets active profile by default
`/api/current`	`ma=N`	Set motor run current (1,000–4,500 mA)
`/api/work_zone`	`delta=N`	Adjust work zone blanking steps
`/api/endpoint`	`which=up\|down` `&delta=N`	Adjust endpoint offset
`/api/batch`	`delta=N` or `action=start\|clear`	Adjust batch target or start/clear
`/api/action`	`do=calibrate\|auto_sg\|return_home\|reset_counter`	Trigger actions
`/api/wifi`	`ssid=...` `&pass=...`	Save WiFi credentials and reboot
`/api/wifi_reset`	—	Clear saved WiFi, reboot to AP mode
`/api/wifi_enable`	`on=0\|1`	Turn WiFi off (immediate) or on (reboots)
`/api/ota`	multipart `.bin` upload	Firmware update
`/api/log_clear`	—	Clear the log buffer

SSE stream available at /events — pushes JSON state every 250 ms and log lines as log events.

Version History

Hardware

Revision	Changes
36 V	36 V motor supply (recommended) — XT60 input, 36 V → 24 V → 5 V step-down chain, open-frame 36 V 10 A PSU in a printed casing with C14 mains inlet, dedicated 36 V print profile on MakerWorld
24 V	Original build — 24 V 5 A PSU, DC jack, 24 V → 5 V buck

Firmware

Version	Changes
v1.32	Slow profile back to 15 kHz (Normal 30, Fast 40)
v1.31	"JAM DETECT LIMITED" warning for profiles where SG sits at the floor; visible feedback on Reset Count
v1.30	Profile speeds changed to 20/30/40 kHz; each trip saved with its speed and cleared at boot if the speed no longer matches
v1.29	Auto SG no longer aborts when SG sits at the floor (0/1) at speed, e.g. 24 V on Normal/Fast; floor readings logged
v1.28	Chopper timing: TBL=2, TOFF=5
v1.27	Jam-detection lockout derived from the trips alone; reboot timing fix so OTA "OK" isn't cut off
v1.26	Auto SG fixes: exempt from lockout, STOP stays live, strokes don't count; all three trips required to unlock; run current stored with trips, re-run reminder on change
v1.25	SG trips default to 0; press locked until Auto SG has run (or trips set by hand)
v1.24	Hard-coded SG values removed from the web UI (they are machine-specific)
v1.23	Auto SG calibration
v1.22	Turning WiFi on now reboots — the web server did not reliably come back otherwise
v1.21	Default SG trips updated to confirmed values (later replaced by Auto SG)
v1.20	Stall polarity restored to `sg > trip` (v1.8 behaviour); SG filter off again; per-stroke max SG logged
v1.19	Per-stroke SG summary also printed on stop and jam
v1.18	Runtime SGT, calibration SGT and relative detector removed — back to one absolute trip per profile
v1.16	SG read and logged even with detection off; per-stroke minimum SG logged
v1.15	LVGL memory pool raised 48 → 80 KB (fixed silent black-screen hang); LVGL logging enabled
v1.14	WiFi on/off switch on touch screen and web; off by default on new installs
v1.13	Runtime-adjustable SGT and relative stall detection (both removed again in v1.18)
v1.12	Switching profile mid-run no longer causes a false jam — applied at the next direction change
v1.11	Settings saved to flash; WiFi supervision/reconnect; web handlers no longer touch motion from the network task; batch/calibration robustness fixes
v1.9	MicroPlyer interpolation enabled; chopper off-time 4
v1.8	Firmware split into modular files (`config.h`, `motion.h`, `ui_touch.h`, `web_server.h`, `wifi_ota.h`) for maintainability — no functional changes from v1.7
v1.7	WiFi Info moved to Configuration sub-menu; Reset WiFi button on WiFi info screen; speed profile buttons resized to fit display; WiFi info centered in card
v1.6	Adjustable motor current (1,000–4,500 mA) via web; multi-page web UI (Main, Configuration, Log, Firmware, WiFi); touch UI restructured (Settings → Configuration sub-menu); WiFi page shows SSID + IP; SG text inputs with auto-submit on blur; profiles retuned
v1.5	Speed profiles (Slow/Normal/Fast) replace speed slider; per-profile SG thresholds; profile API
v1.4	Captive portal WiFi; work zone SG blanking; RUN_DECEL 800k; median-of-5 SPI filter; sliding counter stall detection; redesigned web UI
v1.3	Batch run; jam screen with return-home; runtime StallGuard monitoring; web log viewer
v1.2	Web UI with SSE; OTA updates; endpoint tuning; WiFi AP/STA
v1.1	Sensorless calibration; basic touch UI
v1.0	Initial release

License

This project is licensed under the Creative Commons Attribution-NonCommercial 4.0 International License.

You are free to use, modify, and share this work for personal, non-commercial purposes, provided you give appropriate credit. Commercial use is not permitted without prior written permission.

Commercial use — including selling devices, kits, or services based on this project — is prohibited without prior written permission from the author.

THIS SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND. USE AT YOUR OWN RISK.

Name		Name	Last commit message	Last commit date
AutoLee		AutoLee
.gitignore		.gitignore
AutoLeeWiringDiagram.36v.png		AutoLeeWiringDiagram.36v.png
AutoLeeWiringDiagram.png		AutoLeeWiringDiagram.png
LICENSE		LICENSE
README.md		README.md

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