The Proteus-e is a radio module based on the nRF52 Nordic Semiconductors SoC, which provides various Bluetooth LE and has its focus on low power features. This Application Note shows how easy the "transparent mode" can be used to quickly connect the Proteus-e in order to communicate with a Bluetooth LE connection partner (e.g. a smart device). As second step with more advanced functions, and therefore recommended to be used in applications, the reader is introduced to the Command Mode that is also available to be used on the Proteus-e.