I2C_MPU6050_BME280

        MPU6050 and BME280 sensor modules support configuring I2C addresses and are suitable for the TTGO-Camera Plus development board. Of course, they can also be used alone. When buying this board, you can choose the MPU6050 version. I think it is also a solution for connecting a small external board, but it is much more expensive than the standard version. Since the standard version has reserved this sensor position, it is more cost-effective to make one yourself. Moreover, I saw that their early version also had air pressure and temperature and humidity sensors (later, it seems that the air pressure was canceled because the increase in temperature of the development board would affect the sensor. planning plan), but I still added the barometer ^_^.
 
 
 
        This sensor board did not pull up SCL and SDA when drawing, because there are already pull-up resistors on the development board. Of course, this small board can also be used alone, just make sure there is a pull-up on the development board end.
 
 
 
        In the renderings, the connection pins look like stamp holes, but I’m not sure if this process is free, so the board is made using the normal pad method. After it’s finished, just use sandpaper to remove the excess. .
 
 
        The board used is version V1.0, and the thickness is 0.8. The Gerber file of this version is attached. The open source file is version V1.1, mainly because the outer frame size has been changed. The previously returned board seems to be smaller than the 2D preview, resulting in the outer circle of silk screen being cut off, and two sensors are marked on the back. Configurable I2C address. + represents the address after pull-up, - represents the address after pull-down.
 
 
        The V1.0 version has been verified and the two sensors are working normally. The V1.1 version has not been tested yet (only the frame and silk screen have been changed, the others have not been changed, so there should be no big problem).
 
 
 
        Pay attention to the distinction between BME280 and BMP280. The former has an additional humidity measurement and is much more expensive. The packaging of the two is also different and cannot be used universally.