Has anyone coded support for the BMP390, 581 or 585?

[muenchris]

For my project I need a very fine altitude/pressure meter down to the cm. It looks like the BMP585 from Bosch has the best resolution. There is a Arduino Library available from Bosch for the BMP3xx and BMP5xx.

[josesimoes]

Is that much different from the BMP130? Maybe you can adjust the existing IoT binding for that PN...

[Ellerbach]

They are quite different, looking at a quick comparison for the registers:

Register	BMP180	BMP150	BMP585
Chip ID	0xD0	0xD0	0x00
Soft Reset	0xE0	0xE0	0x7E
Control Register	0xF4	0xF4	0x1B
Status Register	N/A	N/A	0x1A
Temperature Data	0xF6 (MSB), 0xF7 (LSB)	Same	0x04 to 0x06 (24-bit)
Pressure Data	0xF6 to 0xF8	Same	0x07 to 0x09 (24-bit)
Calibration Data	0xAA to 0xBF	Same	Internal, accessed via API
Interrupt Config	N/A	N/A	0x19, 0x1C, 0x1D
FIFO Config	N/A	N/A	0x3F to 0x4F
Oversampling Config	0xF4 (bits 6-7)	Same	0x36
Output Data Rate (ODR)	Fixed	Fixed	0x37
Power Mode Control	N/A	N/A	0x1B, 0x7E
Paging Register	N/A	N/A	0x7F

And that's one of the reason why, the second being the logic and order to access those and get things done per device is different, that we have currently 2 bindings, one for BMP150 and another one for BMP180: https://github.com/nanoframework/nanoFramework.IoT.Device/tree/develop/devices/Bmm150, https://github.com/nanoframework/nanoFramework.IoT.Device/tree/develop/devices/Bmp180

Same apply for the BME/BMP280/BME680: https://github.com/nanoframework/nanoFramework.IoT.Device/tree/develop/devices/Bmxx80

[Ellerbach]

@muenchris you still should be fairly easily, using the code from the 3 other implementations, create one for the BMP585!

[muenchris]

I will look into the BMP180 and 150 implementation. I was first trying to get the BMP390 to work but its not precise enough for my use-case. I have a BMP581 coming tomorrow to test.