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Pin Conflicts

  • During code (firmware) upload, do not make any external connections to the D2 (BT) pin. After the upload process is completed, you may make an external connection.
  • While the built-in addressable RGB LED is in use, do not make any external connections to the D3 pin.
  • If an external connection is provided via the I2C connector, an external connection using an I2C interface with the same pin configuration may be made to the D4 (SDA) and D6 (SCL) pins; however, do not make any other external connections to these pins.

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Incorrect Pin Labeling

In the image below, the sewable pad marked is incorrectly labeled as “A2” on the board. The correct name of this pad is “SCL”.

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Maximum Voltage for Analog Reading

The A0, A1, SCL, A2, A3, and A4 pins, which have 12-bit resolution, can be used as input pins for analog signals. These pins reach the maximum value of 4095 at approximately 2.85 V.