This shield has been specially designed to accommodate three different types of Bluetooth modules (HC-05, BLECC2541, BLE40), each of which is supplied already soldered on support (breakout board) compatible with the X-BEE format.
The shield has the purpose of adapting the voltage levels between Arduino working at 5V and the modules operating at 3.3V, providing a whole series of links with the various pins of the modules, depending on t
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