i have a device programmed to scan for UUID which works.. and then suddenly someplace in 5 - 10 minutes all scanning stops.. with no recovery I tried putting BLE.scan() in loop.. but it doesn't do anything (if not used in setup) which takes me to a question someplace I want to disable scanning to save power.. how do I turn it back on if I can't put scan in loop? my IOT is running off a battery, trying to conserve as much power as possible.