[Weather] Barometer options

Discussion:

deano

2016-12-29 14:47:37 UTC

On Thu, 29 Dec 2016 13:37:00 +0000 (GMT)

Hi,
Are there any ready-made options available for 1-wire compatible
barometers? I have been doing a lot of searching and have found the
information on building a "David Bray" based one. Before I go down
that road and source all the parts, I am hoping there is another
solution.
I have been a longtime lurker on this distro, mostly dabbling in
temperature sensors. Recently I got my hands on a NIB AAG TAI 8515
and RainWise gauge. The battery was dead in the rain gauge but I
swapped the board out for another. I am pretty excited to get a
weather station deployed at home.
Last week I got it all working with Weewx on a Raspberry Pi. So far
it has been working with the various sensors on the bench. If anyone
is interested, I can share my build instructions.
Jeff

I have a TAI-8570 (used) in the drawer in front of me. I use a
Hobbyboards barometer in my system. Best I can remember I had replaced
it (the AAG TAI-8570) with the Hobbyboards barometer due to 1-wire
network stability issues. Ended up solving those issues by modifying
all of my sensors to run powered rather than on parasitic power. As far
as I know the AAG TAI-8570 is parasitic power only.

If you might be interested let me know and I will see if I can dig up a
phone patch cable to test the AAG TAI-8570 and see if it still works:-)

later
deano

Biff Tannen

2016-12-29 14:55:37 UTC

Permalink

Since you're using the Raspberry Pi, you could do what I have done. You
can get the BMP180 pressure sensor breakout board dirt cheap from China
and use it on the I2C bus of the Pi. I use a USB to serial adapter for
the 1-Wire adapter and wrote a separate Java class to do the I2C stuff
and incorporate the data into the rest of the 1-Wire software. I left
the Bray barometer connected to the 1-Wire bus but set up a choice in
the init of which barometer to use, thinking that I would likely return
to the Bray unit. The BMP180 has worked so reliably that I have used it
exclusively for about two years running now. It even has a temperature
sensor that can be read for checking temperature in the vicinity of the Pi.

Hi,
Are there any ready-made options available for 1-wire compatible
barometers? I have been doing a lot of searching and have found the
information on building a "David Bray" based one. Before I go down
that road and source all the parts, I am hoping there is another solution.
I have been a longtime lurker on this distro, mostly dabbling in
temperature sensors. Recently I got my hands on a NIB AAG TAI 8515 and
RainWise gauge. The battery was dead in the rain gauge but I swapped
the board out for another. I am pretty excited to get a weather
station deployed at home.
Last week I got it all working with Weewx on a Raspberry Pi. So far it
has been working with the various sensors on the bench. If anyone is
interested, I can share my build instructions.
Jeff
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http://www2.buoy.com/cgi-bin/mailman/listinfo/weather

Jeff Bates

2016-12-30 11:24:01 UTC

Permalink

I like the idea of the I2C device. I came across the Adafruit board in my searches, and was wondering about going that direction. I have no experience with I2C so I will do some research into it.

On Dec 29, 2016, at 11:25 AM, Biff Tannen <***@gmail.com> wrote:

Since you're using the Raspberry Pi, you could do what I have done. You can get the BMP180 pressure sensor breakout board dirt cheap from China and use it on the I2C bus of the Pi. I use a USB to serial adapter for theÂ 1-Wire adapter and wrote a separate Java class to do the I2C stuff and incorporate the data into the rest of the 1-Wire software. I left the Bray barometer connected to the 1-Wire bus but set up a choice in the init of which barometer to use, thinking that I would likely return to the Bray unit. The BMP180 has worked so reliably that I have used it exclusively for about two years running now. It even has a temperature sensor that can be read for checking temperature in the vicinity of the Pi.

On 12/29/2016 5:37 AM, Jeff Bates wrote:

Hi,

Are there any ready-made options available for 1-wire compatible barometers? I have been doing a lot of searching and have found the information on building a "David Bray" based one. Before I go down that road and source all the parts, I am hoping there is another solution.

I have been a longtime lurker on this distro, mostly dabbling in temperature sensors. Recently I got my hands on a NIB AAG TAI 8515 and RainWise gauge. The battery was dead in the rain gauge but I swapped the board out for another. I am pretty excited to get a weather station deployed at home.

Last week I got it all working with Weewx on a Raspberry Pi. So far it has been working with the various sensors on the bench. If anyone is interested, I can share my build instructions.

Jeff

Nicholas Humfrey

2016-12-30 12:36:38 UTC

Permalink

Hello,

I am in a similar situation; I have been looking for a outdoor
barometric pressure sensor for a while.

I got a BME280 sensor breakout for Christmas (how did my family know??):
https://www.adafruit.com/products/2652

"This precision sensor from Bosch is the best low-cost sensing solution
for measuring humidity with ±3% accuracy, barometric pressure with ±1
hPa absolute accuracy, and temperature with ±1.0°C accuracy."

Now trying to work out the best enclosure to put it in - that protects
it but allows air to circulate. I also need to see how long a cable i2c
can work over - hopefully around 60cm from the Raspberry Pi in my shed
to the outside.

nick.

Post by Jeff Bates
I like the idea of the I2C device. I came across the Adafruit board in
my searches, and was wondering about going that direction. I have no
experience with I2C so I will do some research into it.

Post by Biff Tannen
Since you're using the Raspberry Pi, you could do what I have done.
You can get the BMP180 pressure sensor breakout board dirt cheap
from China and use it on the I2C bus of the Pi. I use a USB to
serial adapter for the 1-Wire adapter and wrote a separate Java
class to do the I2C stuff and incorporate the data into the rest of
the 1-Wire software. I left the Bray barometer connected to the
1-Wire bus but set up a choice in the init of which barometer to
use, thinking that I would likely return to the Bray unit. The
BMP180 has worked so reliably that I have used it exclusively for
about two years running now. It even has a temperature sensor that
can be read for checking temperature in the vicinity of the Pi.

Hi,
Are there any ready-made options available for 1-wire compatible
barometers? I have been doing a lot of searching and have found
the information on building a "David Bray" based one. Before I go
down that road and source all the parts, I am hoping there is
another solution.
I have been a longtime lurker on this distro, mostly dabbling in
temperature sensors. Recently I got my hands on a NIB AAG TAI 8515
and RainWise gauge. The battery was dead in the rain gauge but I
swapped the board out for another. I am pretty excited to get a
weather station deployed at home.
Last week I got it all working with Weewx on a Raspberry Pi. So
far it has been working with the various sensors on the bench. If
anyone is interested, I can share my build instructions.
Jeff
_______________________________________________
Weather mailing list
http://www2.buoy.com/cgi-bin/mailman/listinfo/weather

_______________________________________________
Weather mailing list
http://www2.buoy.com/cgi-bin/mailman/listinfo/weather

Brian D

2016-12-30 13:54:40 UTC

Permalink

Does it need to be outdoors for barometric pressure?

I lost my baro sensor some time ago. Is there a software patch to add this
sensor?

Post by Nicholas Humfrey
Hello,
I am in a similar situation; I have been looking for a outdoor barometric
pressure sensor for a while.
https://www.adafruit.com/products/2652
"This precision sensor from Bosch is the best low-cost sensing solution
for measuring humidity with ±3% accuracy, barometric pressure with ±1 hPa
absolute accuracy, and temperature with ±1.0°C accuracy."
Now trying to work out the best enclosure to put it in - that protects it
but allows air to circulate. I also need to see how long a cable i2c can
work over - hopefully around 60cm from the Raspberry Pi in my shed to the
outside.
nick.

Post by Biff Tannen
Since you're using the Raspberry Pi, you could do what I have done.
You can get the BMP180 pressure sensor breakout board dirt cheap from
China and use it on the I2C bus of the Pi. I use a USB to serial
adapter for the 1-Wire adapter and wrote a separate Java class to do
the I2C stuff and incorporate the data into the rest of the 1-Wire
software. I left the Bray barometer connected to the 1-Wire bus but
set up a choice in the init of which barometer to use, thinking that I
would likely return to the Bray unit. The BMP180 has worked so
reliably that I have used it exclusively for about two years running
now. It even has a temperature sensor that can be read for checking
temperature in the vicinity of the Pi.

_______________________________________________ Weather mailing list

--
BD

Arne Henriksen

2016-12-30 17:41:34 UTC

Permalink

No, there is no need to have the barometer outside, unless you are living
in a decompression tank... :-)

Regards,
Arne
----------------------------------------------
Arne S. Henriksen
tlf: +47 900 90 410

***@henriksens.net
Svehøgda 94, 7550 Hommelvik, Norway
www.villmarkstoppen.no
----------------------------------------------

Brian D <***@planet3.freeuk.co.uk>
Sent by: weather-bounces+arne=***@buoy.com
30.12.2016 14:54
Please respond to List for 1 Wire Weather Stations and devices

To: List for 1 Wire Weather Stations and devices <***@buoy.com>
cc:
Subject: Re: [Weather] Barometer options
Does it need to be outdoors for barometric pressure?

I lost my baro sensor some time ago. Is there a software patch to add this
sensor?

Post by Nicholas Humfrey
Hello,
I am in a similar situation; I have been looking for a outdoor

barometric

Post by Nicholas Humfrey
pressure sensor for a while.
https://www.adafruit.com/products/2652
"This precision sensor from Bosch is the best low-cost sensing solution
for measuring humidity with ±3% accuracy, barometric pressure with ±1

hPa

Post by Nicholas Humfrey
absolute accuracy, and temperature with ±1.0°C accuracy."
Now trying to work out the best enclosure to put it in - that protects

Post by Nicholas Humfrey
but allows air to circulate. I also need to see how long a cable i2c can
work over - hopefully around 60cm from the Raspberry Pi in my shed to

the

Post by Nicholas Humfrey
outside.
nick.

Post by Biff Tannen
Since you're using the Raspberry Pi, you could do what I have done.
You can get the BMP180 pressure sensor breakout board dirt cheap

from