Classic and LE v5.4 is one Bluetooth module

Würth Elektronik has combined Classic and LE version 5.4 in a single Bluetooth module measuring 16.6 x 12 x 1.7mm including its antenna.

Wurth Skoll1 Bluetooth mofule transceiver

Called Skoll-I, “the module is already certified for conformity in all major target markets”, said Wurth. The “module offers an opportunity for developing devices that need to connect to both legacy and modern devices. [It] also offers a way to replace the Puck-I Bluetooth module which can no longer be qualified for new developments due to the withdrawal of the Bluetooth 2.0 specification”.

BR, EDR 2 and 3Mbit/s are supported, as are LE 1 and 2Mbit/s, and the module is certified to CE, FCC, IC, TELEC and ETA-WPC standards said Wurth.


400m line-of-sight range is expected during 1Mbit/s LE operation (2m altitude, two-ray ground-reflection).


Output power with a 3V supply is 2.4dBm (BR 1Mbit/s), 0.8dBm (EDR 2Mbit/s) or 1.1dBm (EDR 3Mbit/s), and receiver sensitivity at 0.1% bit error rate is -91dBm (BR 1Mbit/s, DH1), -92 dBm (EDR 2Mbit/s, 2-DH1) or -87 dBm (EDR 3Mbit/s, 3-DH1).

Transmit supply current is 10.4mA (BR 1Mbit/s) or 13.2mA (EDR 2 or 3Mbit/s), and receive supply current is 4.8mA (BR 1Mbit/s, DH1) or 5.1mA (EDR 2 or 3Mbit/s).

The company’s LE Terminal App is available for testing and developing apps, and there is a software development kit as well as an evaluation board that can be connected to a PC.

Find Skoll-1 on this Wurth product page

Ezurio combined Wi-Fi 6 and Bluetooth LE 5.4 in a module announced by distributor Mouser Electronics in April.

Steve Bush

Steve Bush is the long-standing technology editor for Electronics Weekly, covering electronics developments for more than 25 years. He has a particular interest in the Power and Embedded areas of the industry. He also writes for the Engineer In Wonderland blog, covering 3D printing, CNC machines and miscellaneous other engineering matters.

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