A lot of Bluetooth Low Energy capable devices are spread since the last few years, offering a brand new way to compromise many "smart" objects: fitness wristbands, smart locks and padlocks and even healthcare devices. But this protocol poses some new challenges: how may one easily intercept every communication between a device and an application ? During months (years ?) we've been using Bluetooth Low Energy sniffers (like Ubertooth or even Adafruit's Bluefruit sniffer) to perform security assessments on many connected devices, with not so much success because of the erratic way BLE sniffers work. There were no easy way to perform a decent man-in-the-middle attack on BLE enabled devices. This is why we developed 'BtleJuice', the first framework to fill in the gap and allow spying on communications between two BLE devices without SDR. We designed it to be modular and to allow MAC spoofing using a compatible Bluetooth LE adapter.