The Arduino Nano 33 BLE and Arduino Nano 33 BLE Sense are built around the NINA-B306 module, based on the Nordic nRF52840 and containing a powerful Cortex-M4F. Both include an onboard 9-axis Inertial Measurement Unit (IMU), the LSM9DS1. The Nano 33 BLE Sense adds an LPS22HB barometric pressure and temperature sensor, an HTS221 humidity sensor, an APDS-9960 digital proximity, ambient light, RGB, and gesture sensor, and an MP34DT05 digital microphone. The Arduino Nano 33 BLE Sense Rev2 replaces the LSM9DS1 with a combination of the BMI270 and BMM150, the HTS221 with the HS3003, and the MP34DT05 with the MP34DT06JTR.
Note: the Arduino Nano 33 BLE and BLE Sense do not include a QSPI external flash. Any Python code will need to be stored on the internal flash filesystem.
I2C pins board.SCL1 and board.SDA1 are not exposed and are used for onboard peripherals.
Pin board.R_PULLUP must be set to high to enable the SCL1 and SDA1 pullups for proper operation.
Pin board.VDD_ENV applies power to the IMU, the pressure sensor and the humidity sensor, and must be high for them to be operational.
Pins board.MIC_PWR, board.PDMDIN, and board.PDMCLK are for the Nano 33 BLE Sense onboard microphone.
Pin board.INT_APDS is the interrupt pin from the APDS-9960.
Pin board.INT_BMI_V2 is the interrupt pin from the BMI270. This pin is only present on the BLE Sense Rev2.
Pin board.INT_LPS_V2 is the interrupt pin from the LPS22. This pin is only present on the BLE Sense Rev2.
Pins board.RGB_LED_R, board.RGB_LED_G, and board.RGB_LED_B
are the red, green and blue LEDS in the onboard RGB LED.
Pins board.LED_G and board.LED_Y are onboard green and red LEDs. board.LED_Y is also board.SCK.