PilotAware

British Forum => General Discussion => Topic started by: payman on November 13, 2015, 11:04:31 am

Title: barometric pressure
Post by: payman on November 13, 2015, 11:04:31 am

I have now managed to get everything working but I was wondering if anyone could help me with attaching a pressure sensor (MPL3115A2 ) to my unit I have one of these units but don't know were to solder all the legs to .

Title: Re: barometric pressure
Post by: Winged_Jaguar on November 13, 2015, 12:08:02 pm

I'm about to add this sensor too.

This article is helpful http://ciaduck.blogspot.co.uk/2014/12/mpl3115a2-sensor-with-raspberry-pi.html

Connections from the mpl3115a2 board routing back to these Pi connection pins

Pin 1 VCC 3.3v
Pin 3 SDA
Pin 5 SCL
Pin 6 GND

Chris

Title: Re: barometric pressure
Post by: Ian Melville on November 13, 2015, 12:20:08 pm

Connections are covered here...

http://forum.pilotaware.com/index.php/topic,233.0.html

Title: Re: barometric pressure
Post by: neilmurg on November 13, 2015, 03:52:07 pm

Also handy pictures here: http://forum.pilotaware.com/index.php/topic,57.0.html
Which is adding baro to slice of POD. I think somewhere it says that the 3.3v pin out on the PI isn't strong enough, so you need a Slice of POD, digole board or similar (I barely know what I'm saying at this point)

Title: Re: barometric pressure
Post by: Winged_Jaguar on November 14, 2015, 09:58:55 am

The MPL3115A2 is a low current device and appears to be fine on the Pi 3.3v. The ARF needs its own 3.3v feed to power the transceiver.