https://wiki.jw-tech.eu/index.php?action=history&feed=atom&title=WSAL21474_%E2%80%93_Pico-BLE%2FenWSAL21474 – Pico-BLE/en - Versionsgeschichte2026-10-23T22:25:17ZVersionsgeschichte dieser Seite in JW Tech WikiMediaWiki 1.43.9https://wiki.jw-tech.eu/index.php?title=WSAL21474_%E2%80%93_Pico-BLE/en&diff=2141&oldid=prevJWTechPublisher: Freigegebene technische Dokumentation veröffentlicht; Text-only und noindex2026-09-05T23:11:20Z<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 Pico-BLE (WSAL21474) is a dual-mode Bluetooth module supporting SPP and BLE, controlled via UART AT commands.<br />
<br />
== Related products at JW Tech ==<br />
* [https://shop.jw-tech.eu/p/WSAL21474 WSAL21474 – Dual-Mode Bluetooth Module for Raspberry Pi Pico, SPP / BLE, Bluetooth 5.1]<br />
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== Technical overview ==<br />
* Dual-mode Bluetooth 5.1 module for the Raspberry Pi Pico series.<br />
* Communication over UART; example code uses 115200 baud by default.<br />
* Dimensions approx. 56.5 × 21 mm; operating voltage 3.3 V or 5 V.<br />
* Connects via standard Pico header; UART0 on pins TX=0, RX=1; status pin on pin 15.<br />
* V1.1 (purchased after 2022/02/20) additionally supports connection to a Raspberry Pi via rfcomm.<br />
* C example code implements initialization, command processing, and transparent data forwarding.<br />
* Commands are sent over UART; carriage return + line feed at end of line is required, otherwise commands are invalid.<br />
* For mobile devices: When using the BLE protocol, the notify function must be enabled in the app.<br />
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'''Commands and examples – verify before use:''' <br />
<syntaxhighlight lang="text"><br />
AT+RESET (Zurücksetzen des Moduls)<br />
bluetoothctl (Interaktiver Modus)<br />
show (Statusanfrage: powered / discoverable / pairable)<br />
scan on (Suche nach Geräten)<br />
pair [MAC] (Paarung mit Gerät)<br />
sudo rfcomm conn /dev/rfcomm0 [MAC] (SPP-Verbindung)<br />
echo 1234541 > /dev/rfcomm0 (Daten senden)<br />
cat /dev/rfcomm0 (Daten lesen)<br />
</syntaxhighlight><br />
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== Notes and version constraints ==<br />
* Only slave mode is available – no host mode.<br />
* V1.0 can currently only pair with mobile devices; Raspberry Pi support starts from V1.1 (purchased after 2022/02/20).<br />
* CR+LF line ending is mandatory for AT commands; otherwise they will not be processed.<br />
* Using MicroPython firmware for Pico2 may cause recognition issues; use the recommended firmware from the package.<br />
* The exact AT commands beyond the reset command are not fully listed in the source text – please consult the user manual.<br />
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== Source and revision record ==<br />
* [https://www.waveshare.com/wiki/Pico-BLE Pico-BLE - Waveshare Wiki]<br />
* Source revision: 91316<br />
* Captured: 2026-09-03T02:55:04+00:00<br />
* SHA-256: <code>8ffaa255126124c8abc4962b23363869cea8d746699cdab7633e3f453919166b</code></div>JWTechPublisher