PaparazziUAV - User contributions [en]

Module/Bosch BMP085

2014-09-05T11:01:17Z

Helgewal: /* Usage */

__NOTOC__
[[Image:Bmp085.jpg|thumb|right|Bosch BMP085 barometer]]
== Overview ==

The Bosch BMP085 is a barometer/pressure sensor. There is an alternative float number implementation [http://wmrx00.sourceforge.net/Arduino/BMP085-Calcs.pdf available] that seems to offer less noise, not implemented yet.

The device was tested in a simple static noise comparsion [[Baro_comparsion|setup]].

{|border="1"
|-valign="top"
||Module name||sensors/baro_bmp
|-
|Sensor type
|barometer, temperature
|-
|Range (baro)
|30 kPa .. 1100 kPa
|-
|Range (temp)
| -40°C .. +85°C
|-
|Resolution (baro)
|3 Pa
|-
|Resolution (temp)
|0.1°C
|-
|Refresh rate
|8Hz
|-
|I2C address
|0xEE
|}

[http://www.bosch-sensortec.com/homepage/products_3/environmental_sensors_1/bmp085_1/bmp085 Product home page]

[http://dlnmh9ip6v2uc.cloudfront.net/datasheets/Sensors/Pressure/BST-BMP085-DS000-06.pdf Product data sheet]

== Hardware ==

The sensor directly interfaces to the 3.3V I2C port of the autopilots and is supplied by +3.3V.

Supplier:
[http://www.sparkfun.com/products/9694 Sparkfun]

=== Wiring ===

{|border="1"
|-valign="top"
||'''Autopilot I2C pin'''||'''Autopilot I2C'''||'''Bosch BMP085'''
|-
|1
|GND
|GND
|-
|2
|
|
|-
|3
| +3.3V
|VCC
|-
|4
|SDA
|SDA
|-
|5
|SCL
|SCL
|}

== Usage ==

To use it load the baro_bmp module:
{{Box Code|conf/airframes/myplane.xml|
<source lang="xml">
<modules>
...
<load name="baro_bmp.xml"/>
</modules>
</source>
}}

=== Configuration ===

To see the sensors data in the log file every time new data is available, set SENSOR_SYNC_SEND in your airframe file.

If you omit SENSOR_SYNC_SEND from your airframe file, you will still get the data, but at 1/10 of the available rate.
{{Box Code|conf/airframes/myplane.xml|
<source lang="xml">
<modules>
...
<load name="baro_bmp.xml">
<define name="SENSOR_SYNC_SEND"/>
</load>
</modules>
</source>
}}

===Result message===

The raw data (UP/UT) and the converted result (press/temp) is written to the log file.
{{Box Code|conf/messages.xml|
<source lang="xml">
<message name="BMP_STATUS" id="84">
<field name="UP" type="int32"/>
<field name="UT" type="int32"/>
<field name="press" type="int32" unit="Pa"/>
<field name="temp" type="int32" unit="10x_deg_celsius"/>
</message>
</source>
}}

Sample log file lines
8.272 123 BMP_STATUS 336765 28975 98628 219
8.507 123 BMP_STATUS 336765 28973 98629 219
8.741 123 BMP_STATUS 336775 28975 98629 219
8.973 123 BMP_STATUS 336778 28973 98630 219

[[Category:User_Documentation]] [[Category:Modules]]

Module/Bosch BMP085

2014-09-05T10:58:25Z

Helgewal: /* Usage */

__NOTOC__
[[Image:Bmp085.jpg|thumb|right|Bosch BMP085 barometer]]
== Overview ==

The Bosch BMP085 is a barometer/pressure sensor. There is an alternative float number implementation [http://wmrx00.sourceforge.net/Arduino/BMP085-Calcs.pdf available] that seems to offer less noise, not implemented yet.

The device was tested in a simple static noise comparsion [[Baro_comparsion|setup]].

{|border="1"
|-valign="top"
||Module name||sensors/baro_bmp
|-
|Sensor type
|barometer, temperature
|-
|Range (baro)
|30 kPa .. 1100 kPa
|-
|Range (temp)
| -40°C .. +85°C
|-
|Resolution (baro)
|3 Pa
|-
|Resolution (temp)
|0.1°C
|-
|Refresh rate
|8Hz
|-
|I2C address
|0xEE
|}

[http://www.bosch-sensortec.com/homepage/products_3/environmental_sensors_1/bmp085_1/bmp085 Product home page]

[http://dlnmh9ip6v2uc.cloudfront.net/datasheets/Sensors/Pressure/BST-BMP085-DS000-06.pdf Product data sheet]

== Hardware ==

The sensor directly interfaces to the 3.3V I2C port of the autopilots and is supplied by +3.3V.

Supplier:
[http://www.sparkfun.com/products/9694 Sparkfun]

=== Wiring ===

{|border="1"
|-valign="top"
||'''Autopilot I2C pin'''||'''Autopilot I2C'''||'''Bosch BMP085'''
|-
|1
|GND
|GND
|-
|2
|
|
|-
|3
| +3.3V
|VCC
|-
|4
|SDA
|SDA
|-
|5
|SCL
|SCL
|}

== Usage ==

To use it load the baro_bmp module:
{{Box Code|conf/airframes/myplane.xml|
<source lang="xml">
<modules>
...
<load name="baro_bmp.xml"/>
</modules>
</source>
}}

=== Configuration ===

To see the sensors data in the log file every time new data is available, set SENSOR_SYNC_SEND in your airframe file.
If you omit SENSOR_SYNC_SEND from your airframe file, you will still get the data, but at 1/10 of the available rate.
{{Box Code|conf/airframes/myplane.xml|
<source lang="xml">
<modules>
...
<load name="baro_bmp.xml">
<define name="SENSOR_SYNC_SEND"/>
</load>
</modules>
</source>
}}

===Result message===

The raw data (UP/UT) and the converted result (press/temp) is written to the log file.
{{Box Code|conf/messages.xml|
<source lang="xml">
<message name="BMP_STATUS" id="84">
<field name="UP" type="int32"/>
<field name="UT" type="int32"/>
<field name="press" type="int32" unit="Pa"/>
<field name="temp" type="int32" unit="10x_deg_celsius"/>
</message>
</source>
}}

Sample log file lines
8.272 123 BMP_STATUS 336765 28975 98628 219
8.507 123 BMP_STATUS 336765 28973 98629 219
8.741 123 BMP_STATUS 336775 28975 98629 219
8.973 123 BMP_STATUS 336778 28973 98630 219

[[Category:User_Documentation]] [[Category:Modules]]