FHEM Forum

FHEM - Hausautomations-Systeme => 1Wire => Thema gestartet von: kroonen am 23 Juli 2013, 14:14:23

Titel: Bosch BMP085 pressure sensor i2c on 1-wire?
Beitrag von: kroonen am 23 Juli 2013, 14:14:23
Hi,

I'm using a bmp085 for pressure measurement on a rpi. That wordk, but i'm limited to the rpi. I wanto to use the bosch bmp085 on fhem with 1-wire, or?? But it uses the i2c bus.

http://www.john.geek.nz/2012/08/reading-data-from-a-bosch-bmp085-with-a-raspberry-pi/ (//www.john.geek.nz/2012/08/reading-data-from-a-bosch-bmp085-with-a-raspberry-pi/)

Is this possible with 1-wire, and is it simple to do?

I also bought an usb to i2c adapater on ebay, but he doesn't see it in linux

Any ideas if it should work with 1-wire?? And what do I need?
Titel: Aw: Bosch BMP085 pressure sensor i2c on 1-wire?
Beitrag von: Prof. Dr. Peter Henning am 24 Juli 2013, 08:32:10
You cannot put an i2c device on the 1-W bus - totally different protocols and concepts.

Regards

pah
Titel: Aw: Bosch BMP085 pressure sensor i2c on 1-wire?
Beitrag von: betateilchen am 24 Juli 2013, 12:04:53
You can use this sensor on I2C-bus on your raspberry with fhem. FHEM can use module (currently in beta-state) 51_I2C_BMP180.pm to do exactly what you want.

Link (http://forum.fhem.de/index.php?topic=13878.0)
Link (http://forum.fhem.de/index.php?topic=13771.0)

(only in German, but you will find essential informations there)

BMP180 and BMP085 use the same data, don't worry about this.


Regards,
Udo