Got a replacement SwitchBot Lock Pro due to bugs, or just have a spare one lying around? Don't let it become e-waste! This project repurposes the powerful motor of the Lock Pro to automate your bead-chain roller blinds. Cheaper than buying a dedicated blind motor, and stronger than most retrofit solutions.

Features:

• ♻️ Upcycling: Perfect use for "defective" units that still have a working motor but bad firmware/locking logic.
• ⚙️ Custom Gear: Designed to grip standard roller blind bead chains firmly (tested with 4.5 mm size beads).
• 🧱 Wall Mount: Sturdy mounting bracket that holds the heavy lock body securely against the wall.
• 🏠 Smart Home Ready: Works perfectly with Home Assistant (YAML configuration included below).

Print Settings:

• Material: PETG or PLA+ (Standard PLA might creep under tension over time).
• Infill: 25% or higher for strength.
• Supports: No

How to use / Assembly Guide:

1.  Prepare the Gear: Thread your roller blind's bead chain into the 3D printed gear.
2.  Dry Fit: Insert the gear (with the chain) into the 3D printed wall mount bracket, then temporarily fit the SwitchBot Lock Pro motor onto the assembly.
3.  Positioning: Hold the assembly against the wall. Pull it down slightly until the bead chain is taut (tension is critical for grip!). Mark the screw hole positions on the wall.
4.  Mounting: Remove the motor and gear, then drill/screw the wall mount bracket securely to the marked position.
5.  Final Assembly: Place the gear (with the chain engaged) back into the mounted bracket. Snap the SwitchBot Lock Pro motor onto the mount.
6.  Secure (Optional): You can use the two original factory screws from the SwitchBot to fix the motor to the printed mount for extra stability.
7.  Calibration: Open the SwitchBot App.
   Set LOCKED position = Blind DOWN (Closed).
   Set UNLOCKED position = Blind UP (Open).
   *Note: Ignore magnet warnings if they occur during setup
 

Bonus: Home Assistant Configuration (YAML) To make it behave like a real blind (Cover entity) instead of a lock, use this Template Cover configuration:

You must replace `lock.lock_pro_XX` in the code below with your actual device's Entity ID!

template:
 - cover:
     - name: "SwitchBot Blind"
       unique_id: switchbot_blind
       device_class: blind
       state: >-
         {% if is_state('lock.lock_pro_XX', 'unlocking') %}
           opening
         {% elif is_state('lock.lock_pro_XX', 'locking') %}
           closing
         {% elif is_state('lock.lock_pro_XX', 'unlocked') %}
           open
         {% elif is_state('lock.lock_pro_XX', 'jammed') %}
           jammed
         {% else %}
           closed
         {% endif %}

       open_cover:
         - condition: state
           entity_id: lock.lock_pro_XX
           state: "locked"
         - action: lock.unlock
           target:
             entity_id: lock.lock_pro_XX
       close_cover:
         - condition: state
           entity_id: lock.lock_pro_XX
           state: "unlocked"
         - action: lock.lock
           target:
             entity_id: lock.lock_pro_XX
       icon: >-
         {% if is_state('lock.lock_pro_XX', 'unlocking') %}
           mdi:arrow-up-bold-box-outline
         {% elif is_state('lock.lock_pro_XX', 'locking') %}
           mdi:arrow-down-bold-box-outline
         {% elif is_state('lock.lock_pro_XX', 'unlocked') %}
           mdi:blinds-open
         {% elif is_state('lock.lock_pro_XX', 'jammed') %}
           mdi:alert-decagram
         {% else %}
           mdi:blinds
         {% endif %}