Peripherals

Antenna

The on-board BLE antenna can be switched on or off using the the SW3 “RF” slide switch on the bottom-right side of the board.

Push Buttons

  • SW1: “STATUS” button (BUTTON1 signal)

  • SW2: “RESET” button

RGB LEDs

D4…D7: 4x APA102C addressable RGB LEDs.

These RGB LEDs are connected to the nRF52832 over SPI. Power supply to these RGB LEDs is controlled by the PWR_EN signal, connected to a GPIO of the nRF52832.

Sensors

  • Sensirion SHT30-DIS Temperature and humidity sensor

  • Bosch BMI270 Accelerometer

These sensors are connected to the nRF52832 over I2C, with interrupt lines connected to GPIOs.

Buzzer

SP1: Murata PKLCS1212E4001R1 Solid state piezo buzzer, controlled by the BUZZER signal from the nRF52832.