CubeCell

From Eric

The CubeCell module

[cubecell.jpg]

Problem uploading sketches

In case you cannot upload the sketch to the cude cell (timeout when connecting to the bootloader), a solution consists to set the CubeCell in bootloader mode manually by:

• pressing the user button
• pressing the reset button
• releasing the reset button
• releasing the user button

Measuring battery level

The battery voltage can be read using the getBatteryVoltage() API. This is achieved by connecting the ADC to vbat via a voltage divider (*1/2):

In order to prevent the battery to dry out via the divider, connection to vbat is controlled by GPIO7 via a dual transistor (AO7801).