View source for Module/VTI SCP1000 I2C

__NOTOC__
[[Image:Scp1000_i2c.jpg|thumb|right|VTI SCP1000-D11 (I2C) on evaluation board]]
== Overview ==

The VTI SCP1000-D11 (I2C) is a barometer/pressure sensor. '''Unfortunately this device is no longer being produced.'''

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

{|border="1"
|-valign="top"
||Module name||sensors/baro_scp_i2c
|-
|Sensor type
|barometer, temperature
|-
|Range (baro)
|30kPa .. 120kPa
|-
|Range (temp)
| -30°C .. +85°C
|-
|Resolution (baro)
|0.25Pa
|-
|Resolution (temp)
|0.05°C
|-
|Refresh rate
|1.8Hz
|-
|I2C address
|0x22
|}

[http://www.sparkfun.com/datasheets/Components/SCP1000-D01.pdf Product data sheet]

== Hardware ==

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

=== Wiring ===

{|border="1"
|-valign="top"
||'''Autopilot I2C pin'''||'''Autopilot I2C'''||'''VTI SCP1000 I2C'''
|-
|1
|GND
|GND
|-
|2
|
|
|-
|3
| +3.3V
|Vcc
|-
|4
|SDA
|SDA
|-
|5
|SCL
|SCL
|}


== Usage ==

To use it load the baro_scp_i2c module:
{{Box Code|conf/airframes/myplane.xml|
<source lang="xml">
  <modules>
    ...
    <load name="baro_scp_i2c.xml"/>
  </modules>
</source>
}}

=== Configuration ===

To see the sensors data in the log file set the SENSOR_SYNC_SEND in your airframe file. Every time new data is available it will be sent directly.
{{Box Code|conf/airframes/myplane.xml|
<source lang="xml">
  <modules>
    ...
    <load name="baro_scp_i2c.xml">
      <define name="SENSOR_SYNC_SEND"/>
    </load>
  </modules>
</source>
}}

===Result message===

There is no conversion needed so the raw data is output, the pressure is given in 1/100 of Pascal.
{{Box Code|conf/messages.xml|
<source lang="xml">
  <message name="SCP_STATUS" id="88">
    <field name="press" type="uint32" unit="Pa"/>
    <field name="temp" type="int16" unit="100x_deg_celsius"/>
  </message>
</source>
}}


Sample log file lines
 12.016 123 SCP_STATUS 10085150 2305
 12.567 123 SCP_STATUS 10086450 2300
 13.114 123 SCP_STATUS 10085600 2300
 13.664 123 SCP_STATUS 10086125 2305

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