Hi there. Just aquired one of these Spark Plug dongles, plugged it with car on track, green flashing light which I understand is correct, although the dongle, supposed to be new! Came loose (no Scalextric packaging) from supplier, also came without instructions. Downloaded and Launched the app from Google Play onto my Samsung Galaxy A40, the app appears to be working OK. Bluetooth and Location on, it sees the SparkPlug_216 but it wont pair, keeps coming up with the message "An app is need to use this device", even with the app launched! Can anyone help, offer any suggestions how I might 'pair' this device with my phone? Regards André