The Wireless Connectivity and Sensors division at Würth Elektronik eiSos has rolled out firmware version 3.4.0 of its Proteus I Bluetooth module. The most important improvement is the more than twofold increase in UART (universal asynchronous receiver transmitter) baud rate, with the maximum data throughput going from 36 Kbps to 80 Kbps.
The newly introduced UART flow control guarantees that no data packets get lost on the UART. This, and extensive possibilities for firmware individualisation, are further improvements on the product. With firmware version 3.4.0, the data throughput of 80 Kbps can be achieved with a single BLE (Bluetooth Low Energy) packet per connection interval, and is therefore compatible with all BLE 4.2 devices on the market.
Manufacturers that make their products Bluetooth-enabled using the Proteus I module can now also completely determine how it appears to the communication partner. This starts with its appearance, i.e. the device name and icon displayed to the user in the list of possible Bluetooth connections. A profile can also be added with the Device Information Service (DIS) to make more of the device’s information available with wireless technology, for example the name of the device manufacturer or the serial number.
The Proteus II 2,4 GHz BLE wireless module, with dimensions of 11 x 8 x 1,8 mm, has a feature that is actually no longer intended in the Bluetooth Low Energy standard (Bluetooth Smart): the serial port profile (SPP) for emulating a serial cable connection. Data transmission is enabled with the AMBER SPP-like profile, which is based on the optional Bluetooth 4.2 ‘data length extension’ feature and increases the data throughput.
Firms can make this BLE profile their own by assigning their own UUID, for example to register the profile with the Bluetooth Special Interest Group (SIG). Würth Elektronik eiSos also offers customers individualisation of the firmware, while guaranteeing adherence with the relevant guidelines in the wireless domain.
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