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	<title>WSAL21593 – Servo Driver with ESP32/en - Versionsgeschichte</title>
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		<summary type="html">&lt;p&gt;Freigegebene technische Dokumentation veröffentlicht; Text-only und noindex&lt;/p&gt;
&lt;p&gt;&lt;b&gt;Neue Seite&lt;/b&gt;&lt;/p&gt;&lt;div&gt;__NOINDEX__&lt;br /&gt;
&amp;#039;&amp;#039;&amp;#039;Documentation notice:&amp;#039;&amp;#039;&amp;#039; 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.&lt;br /&gt;
&lt;br /&gt;
== Summary ==&lt;br /&gt;
Compact expansion board with ESP32 for controlling serial bus servos via UART, WiFi and an integrated web interface.&lt;br /&gt;
&lt;br /&gt;
== Related products at JW Tech ==&lt;br /&gt;
* [https://shop.jw-tech.eu/p/WSAL21593 WSAL21593 – ESP32 Servo Driver Expansion Board, Built-In WiFi and Bluetooth, ESP32-WROOM-32, ESP32s]&lt;br /&gt;
&lt;br /&gt;
== Technical overview ==&lt;br /&gt;
* Controls up to 253 SC or ST series bus servos simultaneously; adequate power supply required.&lt;br /&gt;
* Input voltage and servo voltage must match (6–12 V DC).&lt;br /&gt;
* Integrated OLED display shows relevant status information.&lt;br /&gt;
* Web app allows changing servo ID and operating mode (servo/motor mode).&lt;br /&gt;
* ESP-NOW enables wireless remote control between master and slave boards.&lt;br /&gt;
&lt;br /&gt;
&amp;#039;&amp;#039;&amp;#039;Commands and examples – verify before use:&amp;#039;&amp;#039;&amp;#039; &lt;br /&gt;
&amp;lt;syntaxhighlight lang=&amp;quot;text&amp;quot;&amp;gt;&lt;br /&gt;
flash_download_tool_3.9.5.exe&lt;br /&gt;
&amp;lt;/syntaxhighlight&amp;gt;&lt;br /&gt;
&lt;br /&gt;
== Notes and version constraints ==&lt;br /&gt;
* The maximum scan limit is ID 20; higher IDs require modifying MAX_ID in ServoDriverST.ino and re-uploading.&lt;br /&gt;
* Only one servo should be connected when assigning IDs to avoid collisions.&lt;br /&gt;
* Default WiFi hotspot is ESP32_DEV with password 12345678; reconnect if connection issues occur.&lt;br /&gt;
* The slave&amp;#039;s MAC address must be entered into broadcastAddress&amp;amp;#91;&amp;amp;#93; in the host code before enabling ESP-NOW.&lt;br /&gt;
* The download process requires selecting a COM port and setting baud rate up to 921600.&lt;br /&gt;
&lt;br /&gt;
== Source and revision record ==&lt;br /&gt;
* [https://www.waveshare.com/wiki/Servo_Driver_with_ESP32 Servo Driver with ESP32 - Waveshare Wiki]&lt;br /&gt;
* Source revision: 110896&lt;br /&gt;
* Captured: 2026-09-03T03:02:22+00:00&lt;br /&gt;
* SHA-256: &amp;lt;code&amp;gt;acc616085d83a7909ab9a4051de270fe6eb69ce0dbe8097bb8799d05e85c2840&amp;lt;/code&amp;gt;&lt;/div&gt;</summary>
		<author><name>JWTechPublisher</name></author>
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