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We tried connecting to the toothbrush via BLE and fetching all the characteristics.

0x04, type 'Characteristic Description', value: Name of characteristicĬharacteristics are further grouped into Services, which means the first Handle is usually a 'service description' that returns a range of related characteristics.

0x03, type 'User Configuration', value: if 0x01, send notification to client if value changes.

0x02, type 'it depends', value: the actual value you want.

Each characteristic typically covers 4 handles: A device should group handles into Characteristics. To structure this, the GATT (Generic Attribute Profile) was created ( more info). On the Oral B toothbrush, about 60 of these handles are available. You can iterate through the available handles on the device and request the value and type of each handle. Once you find a device and connect to it, the ATT (Attribute Protocol) service is available. Each time you receive such an advertisement, you could also query the device for more information this is called active scanning. Listening for these advertisements is called passive scanning. BLE devices advertise their presence through advertisements. You only need a little bit of theory to understand BLE in this context.

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Unfortunately, no quick guide is available on the internet: you are torn between reading quick-and-dirty example code of BLE libraries (such as here), and reading the full spec. This protocol is a reduced version of bluetooth. Trying for ourselves The Oral B toothbrush communicates over BLE. It seems everyone just settled on detecting when the device sends beacons, and thus only reporting 'the toothbrush is on'.

We find some attempts from the Magic Mirror scene, but none are successful.

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Let's crack this nut! The Oral B toothbrush is a BLE device, so we should definitely be able to connect and get some useful information.

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BRUSH YOUR TEETH! I am already using OpenHAB to track the soil moisture levels of my Flower Care bluetooth plant sensors: I regularly get a Help me, I'm dying of thirst message from the clivia plant. I need a more aggressive kick in the butt. I will be honest: it does not work for me. All of this is meant to 'gamify' brushing your teeth. It can also serve as a replacement for the LCD screen when traveling. There is a companion smartphone app that downloads your brushing history from the brush. When you finish, the screen gives you a rating, hoping you brush longer next time. It shows the current brushing time, mouth quadrant you are supposed to be brushing, and whether you are pressing too hard. The device comes with a separate LCD screen that activates whenever you start brushing. A small bluetooth LED gives away the more advanced functionality. The Oral B Smartseries is just like a regular toothbrush.

When Oral B released a toothbrush with bluetooth connectivity, I just could not resist!