Module/VTI SCP1000 I2C
Revision as of 14:49, 7 March 2013 by Martinmm (talk | contribs) (Created page with "__NOTOC__ thumb|right|VTI SCP1000 I2C on evaluation board == Overview == The VTI SCP1000 I2C is an excellent barometer/pressure sensor. '''Unfortunatel…")
Overview
The VTI SCP1000 I2C is an excellent barometer/pressure sensor. Unfortunately this device is no longer being produced.
| 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 |
Hardware
The sensor directly interfaces to the 3.3V I2C port of the autopilots and is supplied by +3.3V.
Wiring
| 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:
| File: conf/airframes/myplane.xml |
<modules>
...
<load name="baro_scp_i2c.xml"/>
</modules>
|
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.
| File: conf/airframes/myplane.xml |
<modules>
...
<load name="baro_scp_i2c">
<define name="SENSOR_SYNC_SEND"/>
</load>
</modules>
|
Result message
There is no conversion needed so the raw data is output, the pressure is given in 1/100 of Pascal.
| File: conf/messages.xml |
<message name="SCP_STATUS" id="88">
<field name="press" type="uint32" unit="Pa"/>
<field name="temp" type="int16" unit="100x_deg_celsius"/>
</message>
|
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