Arduino OKY3259-1 GY-BMP280

Introduction

GY-91 or OKY3259-1 includes BMP280 and MPU-9250 chips.

Accelerometer, gyroscope, magnetic field, pressure, (temp?) Includes Bosch BMP280 sensor <ref> Bosch</ref> for pressure and temperature and MPU-9250 for inertia<ref>https://invensense.tdk.com/wp-content/uploads/2015/02/PS-MPU-9250A-01-v1.1.pdf</ref>.

• https://www.okystar.com/product-item/gy-91-mpu-9250-bmp280-10dof-gyro-compass-9-axis-acceleration-sensor-module-oky3259-3/
• https://www.tme.eu/en/details/oky3259-3/position-sensors/okystar/
• https://www.tme.eu/Document/b956c2c642c186553e2bc647710b8dcc/ACCELEROMETER.txt https://www.youtube.com/watch?v=To7JagpPDwY
• https://invensense.tdk.com/wp-content/uploads/2015/02/PS-MPU-9250A-01-v1.1.pdf

<references/>

Theory

https://electropeak.com/learn/interfacing-gy-91-9-axis-mpu9250-bmp280-module-with-arduino/

Connection

• VIN. Power supply: 5V
• 3V3. Power supply: 3.3V
• GND
• SCL. I²C Clock or SPI clock
• SDA. I²C Data or MOSI pin for SPI
• SDO/ SAO. Address adjust pin
• NCS. Select only MPU-9250
• CSB. Select only bMP-280.

I2C is appropriate for peripherals where simplicity and low manufacturing cost are more important than speed.

Connection

Connect to Arduino

Arduino pins 4 and 5 are hardwired, see https://stackoverflow.com/questions/57582626/changing-wire-librarys-hardware-i2c-pins-for-custom-arduino#57582678

Arduino Board has SCL and SDA pins on the digital side. Those pins work too.

Arduino Libraries

Install

• https://github.com/adafruit/Adafruit_BMP280_Library
• https://github.com/asukiaaa/MPU9250_asukiaaa