ble_chars = [
    '0000ff01-0000-1000-8000-00805f9b34fb', # LithiumBatteryPCB adapter: read/notify
    '0000ff02-0000-1000-8000-00805f9b34fb', # LithiumBatteryPCB adapter: write
    '0000ffe1-0000-1000-8000-00805f9b34fb', # TI CC245x (HM-10, HM-11)
]
ble_chars = [
    '0000ff01-0000-1000-8000-00805f9b34fb', # LithiumBatteryPCB adapter: read/notify
    '0000ff02-0000-1000-8000-00805f9b34fb', # LithiumBatteryPCB adapter: write
    '0000ffe1-0000-1000-8000-00805f9b34fb', # TI CC245x (HM-10, HM-11)
]
# LithiumBatteryPCB adapter: read/notify # LithiumBatteryPCB adapter: write # TI CC245x (HM-10, HM-11)