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WSAL21593 – Servo Driver with ESP32/en

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Documentation notice: This technical documentation was independently rewritten from an archived supplier source. Check technical details and commands against the product version and manufacturer documentation before use.

Summary

Compact expansion board with ESP32 for controlling serial bus servos via UART, WiFi and an integrated web interface.

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Technical overview

  • Controls up to 253 SC or ST series bus servos simultaneously; adequate power supply required.
  • Input voltage and servo voltage must match (6–12 V DC).
  • Integrated OLED display shows relevant status information.
  • Web app allows changing servo ID and operating mode (servo/motor mode).
  • ESP-NOW enables wireless remote control between master and slave boards.

Commands and examples – verify before use:  

flash_download_tool_3.9.5.exe

Notes and version constraints

  • The maximum scan limit is ID 20; higher IDs require modifying MAX_ID in ServoDriverST.ino and re-uploading.
  • Only one servo should be connected when assigning IDs to avoid collisions.
  • Default WiFi hotspot is ESP32_DEV with password 12345678; reconnect if connection issues occur.
  • The slave's MAC address must be entered into broadcastAddress[] in the host code before enabling ESP-NOW.
  • The download process requires selecting a COM port and setting baud rate up to 921600.

Source and revision record

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