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

AutoLee converts a manual Lee APP into a fully automated priming 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.

By K.L Design

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.

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, damage, or loss resulting from building, modifying, or operating this machine. You build and use it entirely at your own risk.

• 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 UP stop using calibration speed with stall detection and retries

• Three preset profiles — Slow (15 kHz, SG=350), Normal (35 kHz, SG=15), Fast (45 kHz, SG=1)
• Per-profile StallGuard threshold — each speed has its own SG trip value, eliminating false jams when changing speed
• One-tap switching — change profile from the touchscreen or web UI; speed and SG update together instantly
• Fine-tune SG per profile — type a value directly into text inputs on the web Configuration page, or use ±1/±5 buttons on the touch screen

• 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

• Runtime StallGuard monitoring — reads SG2 via median-of-5 filtered SPI during operation
• Sliding counter stall detection — requires multiple consecutive high-SG readings to trigger (rejects transient spikes)
• Work zone blanking — skips SG monitoring near the DOWN endpoint where primer seating resistance is normal
• Accel/decel blanking — position-based and time-based SG ignore windows during speed transitions
• Automatic backoff — on jam detection, motor stops and backs off in the opposite direction before showing the jam screen
• Jam recovery screen — one-button return-home using the same proven sensorless homing as calibration

• Set a target count (1–9999) 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

• Stroke counter — counts each completed down-up cycle, displayed large on the main screen (max 9999)
• Resettable from touch UI or web interface

• Main screen — counter (centered), active speed profile indicator, calibration warning, batch remaining, buttons for Batch Run and Settings
• Settings screen — Calibrate, Configuration, Reset Counter, WiFi Info
• Configuration screen — Speed Profile, Endpoints, Stall Guard
• Speed Profile screen — three buttons with green highlight on active, info card showing Hz + SG
• Endpoints (tuning) screen — raw and effective endpoint values, buttons to edit UP and DOWN
• Stall Guard screen — adjust SG trip for the active profile with ±1/±5 buttons
• Batch Run screen — set target count with ±1/10/100 buttons, start batch
• Jam screen — warning display with one-button return home
• WiFi screen — shows connected SSID and IP address, or AP info

• 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, calibrate, reset counter, speed profile selector, batch run controls
• Configuration page — motor current slider (1,000–4,500 mA with overcurrent warning), endpoint tuning with collapsible offsets, per-profile StallGuard text inputs, work zone adjustment
• Log page — full-height 500-line scrollable log with real-time streaming and clear button
• Firmware page — drag-and-drop OTA .bin upload with progress bar
• WiFi page — shows connection status, SSID, and IP address; change credentials, reset to AP mode
• Footer navigation — blue text links on every page to jump between all five pages

• 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
• ArduinoOTA support — update firmware from PlatformIO/Arduino IDE over the network (hostname: autolee, password: autolee)

Note: The buck converter and leadscrew dimensions have not been fully verified — double-check fitment before ordering.

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.

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.

1. Clone this repo
2. Install all "Online" libraries above via the Arduino Library Manager
3. 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
4. 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
5. Open AutoLee.ino in Arduino IDE or PlatformIO
6. Select board: ESP32-C6
7. Set partition scheme: Minimal SPIFFS (1.9 MB APP with OTA/190 KB SPIFFS) — the firmware is too large for the default partition layout
8. Compile and flash

After first flash, firmware can be updated two ways:

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

Key constants at the top of AutoLee.ino:

All endpoints accept POST requests.

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

This project is provided as-is for personal and hobby use. See the source code for details.