https://wiki.jw-tech.eu/index.php?action=history&feed=atom&title=WSAL21550_%E2%80%93_USB_TO_TTL_%28B%29%2FenWSAL21550 – USB TO TTL (B)/en - Versionsgeschichte2026-10-23T22:25:19ZVersionsgeschichte dieser Seite in JW Tech WikiMediaWiki 1.43.9https://wiki.jw-tech.eu/index.php?title=WSAL21550_%E2%80%93_USB_TO_TTL_(B)/en&diff=2496&oldid=prevJWTechPublisher: Freigegebene technische Dokumentation veröffentlicht; Text-only und noindex2026-09-06T06:05:54Z<p>Freigegebene technische Dokumentation veröffentlicht; Text-only und noindex</p>
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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.<br />
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== Summary ==<br />
The Waveshare USB TO TTL (B) is an industrial converter that translates a USB interface into a serial TTL UART port. It uses the original CH343G chip and provides over-current, over-voltage, reverse-polarity and ESD protection plus selectable TTL level options.<br />
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== Related products at JW Tech ==<br />
* [https://shop.jw-tech.eu/p/WSAL21550 WSAL21550 – Industrial USB TO TTL Converter, Original CH343G Onboard, Multi Protection &amp; Systems Support]<br />
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== Technical overview ==<br />
* Component: original CH343G as USB-to-serial adapter<br />
* Interfaces: USB Type-A on the host side; 6-pin right-angle pin header for UART<br />
* Supply voltage: 5 V<br />
* Communication rate: 50 bps up to 6 Mbps<br />
* TTL levels: 5 V / 3.3 V selectable via jumper cap; 2.5 V / 1,8 V only through external voltage input<br />
* Protection circuitry: resettable fuse, TVS diode, IO protection diodes against surges<br />
* Indicators: three LEDs - PWR (red when USB voltage detected), TXD (red while sending), RXD (red while receiving)<br />
* Enclosure: plastic case with matte finish; IDC connector with fool-proof design<br />
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'''Commands and examples – verify before use:''' <br />
<syntaxhighlight lang="text"><br />
ls /dev/tty*<br />
minicom -D /dev/ttyACM0<br />
</syntaxhighlight><br />
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== Notes and version constraints ==<br />
* Using 2.5 V or 1.8 V requires external power injection; verify the exact wiring on site.<br />
* Windows 7 may show a digital signature warning during driver installation; resolving it requires downloading a repair tool - confirm the source of the tool.<br />
* Linux/Raspberry Pi usage is driver-free, but the exact device path name (e.g., ttyACM0) should be verified before use.<br />
* On macOS, the manufacturer driver must be installed; installation steps are version-sensitive and should be confirmed by a professional.<br />
* Android usage requires installing a specific app; availability and compatibility with your device must be checked.<br />
* Inferior knock-offs exist in the market without testing; purchase only through official channels.<br />
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== Source and revision record ==<br />
* [https://www.waveshare.com/wiki/USB_TO_TTL_(B) USB TO TTL (B) - Waveshare Wiki]<br />
* Source revision: 108919<br />
* Captured: 2026-09-03T02:56:24+00:00<br />
* SHA-256: <code>f6927cdf55576a4b780041fbc16c8c2aa836937d3c52c72b63aaf2634874a1d4</code></div>JWTechPublisher