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en:aws [2014/08/18 19:16] – [Communication interface] fluktuaciaen:aws [2015/01/27 11:50] – [Data recording] kaklik
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 ==== RS232/RS485 ==== ==== RS232/RS485 ====
  
-Modules  [[cs:rs232single|RS232SINGLE01A]] or [[cs:ttlrs485|TTLRS48501A]] and microcontroller are suitable to establish a connection depending on the application complexity.+Modules  [[cs:rs232single|RS232SINGLE01A]] or [[cs:ttlrs485|TTLRS48501A]] with microcontroller are suitable to establish a connection depending on the application complexity.
  
 ==== Ethernet ==== ==== Ethernet ====
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 === I²C master === === I²C master ===
  
-In this case, the entire device acts as [[cs:usbi2c| I²C to USB converter]], with reading from individual sensors implemented by program running in USB HOST device. The advantage of this design lies in possibility of obtaining relatively precise information about an absolute time in which the values were measured. Furthermore, changes in software and configuration can be done simply by updating the control program without a risky firmware replacement.+In this case, the entire device acts as [[cs:usbi2c| I²C to USB converter]], with reading from individual sensors implemented by program running at USB HOST device. The advantage of this design lies in possibility of obtaining relatively precise information about an absolute time in which the values were measured. Furthermore, changes in software and configuration can be done simply by updating the control program without a risky firmware replacement.
  
 === Emulated COM port === === Emulated COM port ===
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-===== Reading of measured values =====+===== Reading of the measured values =====
  
 This design offers a possibility of connecting variety of sensors, which are initialised at every station startup. It uses [[cs:i2c|I²C bus]]  with [[cs:i2chub|I2CHUB02A]] module and predefined set of sensors. This design offers a possibility of connecting variety of sensors, which are initialised at every station startup. It uses [[cs:i2c|I²C bus]]  with [[cs:i2chub|I2CHUB02A]] module and predefined set of sensors.
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 ===== Auto diagnostics ===== ===== Auto diagnostics =====
  
-Necessary to implement algorithms controlling mutual correlations of measured values and to detect anomalies.+Still necessary to implement algorithms controlling mutual correlations of measured values and to detect anomalies.
  
-  * Wind direction can not change without speed indication by anemometer.+  * Wind direction can not change without speed indication from anemometer.
  
  
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 ===== Output data format ===== ===== Output data format =====
  
-Ideal output data should be compatible with of the already used meteorological data protocols:+Ideal output data should be compatible with one of the already used meteorological data protocols:
  
   * NMEA   * NMEA
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 ==== Data recording ==== ==== Data recording ====
  
-Data measured by weather station should be recorded and displayed locally. That is why a program serving the weather station should run either on local computer or directly on weather station processor. In the latter case, the weather station would probably run a web server as well, which could provide local data previews and send them to collection network.+Data measured by weather station should be recorded and displayed locally. That is why a program serving the weather station should run either on local computer or directly on weather station processor. In the latter case, the weather station would probably run a web server as well, which could provide local data previews and send them to collecting network.
  
 The following list contains some of the most widespread Open-Source programs for local data recording and processing. The following list contains some of the most widespread Open-Source programs for local data recording and processing.
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 [[http://www.wunderground.com/weatherstation/setup.asp?MR=1#software|zdroj]] [[http://www.wunderground.com/weatherstation/setup.asp?MR=1#software|zdroj]]
  
-Our ideal program should be multi-platform with minimal operating requirements and with possibility of sending data to one of the global network of weather stations. The data should be, at the same time, locally backed up and they should be able to combine with data from other stations. Examples of such databases include: [http://www.arpa.emr.it/dettaglio_documento.asp?id=514&idlivello=64| DB-All.e]]  or [[http://www.unidata.ucar.edu/software/netcdf/docs/|NetCDF]].+Our ideal program should be multi-platform with minimal operating requirements and with possibility of sending data to one of the global network of weather stations. The data should be, at the same time, locally backed up and they should be able to combine with data from other stations. Examples of such database include: [[http://www.arpa.emr.it/dettaglio_documento.asp?id=514&idlivello=64| DB-All.e]]  or [[http://www.unidata.ucar.edu/software/netcdf/docs/|NetCDF]].
  
 ===== Examples of use ===== ===== Examples of use =====
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   * **ver** denotes the device and firmware version    * **ver** denotes the device and firmware version 
   * **seq** is the serial number of a measurement    * **seq** is the serial number of a measurement 
-  * **temp[K]** denotes the temperature from thermometer (in hundredths of Kelvin) +  * **temp[K]** denotes the temperature measured thermometer (in hundredths of Kelvin) 
   * **hum_temp[K]** - temperature from 1st humidity sensor    * **hum_temp[K]** - temperature from 1st humidity sensor 
   * **hum[%]** - relative humidity measured by 1st humidity sensor    * **hum[%]** - relative humidity measured by 1st humidity sensor 
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 This condition occurs after resetting the device. This condition occurs after resetting the device.
  
-Following that, a new firmware can be send using a command listed below (either under root account or under account with absolute access to the serial line)+Following that, a new firmware can be send using a command listed below (either under root account or under account with access to the serial line)
  
   $ echo uf > /dev/ttyUSB0     $ echo uf > /dev/ttyUSB0  
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   * [[http://en.wikipedia.org/wiki/Automatic_weather_station|Automatic weather station]]   * [[http://en.wikipedia.org/wiki/Automatic_weather_station|Automatic weather station]]
 +  * [[http://iepas.net/update-on-the-mma-weather-station/|MMA Weather Station]] - Related project with almost the same ideas. 
   * [[http://en.wikipedia.org/wiki/Automated_airport_weather_station|Automated airport weather station]]   * [[http://en.wikipedia.org/wiki/Automated_airport_weather_station|Automated airport weather station]]
   * [[http://en.wikipedia.org/wiki/Climate_and_Forecast_Metadata_Conventions|Climate and Forecast Metadata Conventions]]   * [[http://en.wikipedia.org/wiki/Climate_and_Forecast_Metadata_Conventions|Climate and Forecast Metadata Conventions]]
en/aws.txt · Last modified: 2015/03/05 22:49 (external edit)