https://wiki.jw-tech.eu/index.php?action=history&feed=atom&title=WSAL17939_%E2%80%93_USB_TO_TTL%2FenWSAL17939 – USB TO TTL/en - Versionsgeschichte2026-10-23T23:17:42ZVersionsgeschichte dieser Seite in JW Tech WikiMediaWiki 1.43.9https://wiki.jw-tech.eu/index.php?title=WSAL17939_%E2%80%93_USB_TO_TTL/en&diff=1244&oldid=prevJWTechPublisher: Freigegebene technische Dokumentation veröffentlicht; Text-only und noindex2026-09-05T22:25:54Z<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 />
<br />
== Summary ==<br />
The Waveshare module converts USB to TTL UART and supports 5 V or 3.3 V via a jumper. It reaches up to 3 Mbit/s; the interface suits microcontrollers, sensors and industrial control devices.<br />
<br />
== Related products at JW Tech ==<br />
* [https://shop.jw-tech.eu/p/WSAL17939 WSAL17939 – Industrial USB TO TTL Converter, Original FT232RNL, Multi Protection &amp; Systems Support]<br />
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== Technical overview ==<br />
* Interface: USB Type A on the host side; the other side provides a TTL UART signal set (TXD, RXD, RTS#, CTS#, etc.).<br />
* Supply voltage: selectable 5 V or 3.3 V for external devices via a jumper.<br />
* Baud rate range: from 300 baud up to 3 Mbit/s (FT232RNL).<br />
* Operating temperature per source: -15 °C to +70 °C; humidity 5 % to 95 % RH.<br />
* Signal pins: TXD/RXD for data transfer; RTS#/CTS# for flow control; DCD#, RI#, DSR# as status signals; RESET# to reset the FT232; CBUS0–CBUS4 as flexible I/O.<br />
* Supported operating systems: Windows 7/8/8.1/10/11, macOS, Linux, Android and WinCE.<br />
* Windows driver options: VCP (virtual COM port) or D2XX (USB API); the product ships a VCP example.<br />
* Linux usage: default drivers available; query device name with “lsusb” or “ls /dev/ttyUSB*”; e.g. “sudo minicom -D /dev/ttyUSB0”.<br />
* Android connection: OTG adapter required; the SerialTool app has drivers integrated.<br />
* Function check: short-circuit TXD and RXD and send data via a serial debugging tool; a response indicates normal operation.<br />
* Pinout with label facing up: top row VCC GND TXD RXD; bottom row 5V GND CTS RTS.<br />
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'''Commands and examples – verify before use:''' <br />
<syntaxhighlight lang="text"><br />
lsusb<br />
ls /dev/ttyUSB*<br />
sudo minicom -D /dev/ttyUSB0<br />
</syntaxhighlight><br />
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== Notes and version constraints ==<br />
* Exact driver files and download links are not fully reproduced in the source; use the official FTDI driver before installation.<br />
* If the COM port is missing after driver install, deleting the COM Name Arbiter registry entry may be needed – only by experienced users.<br />
* Knock-offs of this module circulate; verify originality before purchase.<br />
* Operation outside the stated temperature and humidity ranges can cause malfunction or damage.<br />
* Overvoltage, overcurrent, electrostatic discharge or strong electromagnetic interference can damage the FT232 chip; appropriate protection measures are required.<br />
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== Source and revision record ==<br />
* [https://www.waveshare.com/wiki/USB_TO_TTL USB TO TTL - Waveshare Wiki]<br />
* Source revision: 67698<br />
* Captured: 2026-09-01T02:48:06+00:00<br />
* SHA-256: <code>d4775fb934be13f6fd34f74a80cf121175d2d2b90c5c1c6a190de3905e72a484</code></div>JWTechPublisher