Campbell Weather Stations

Purpose

The purpose of this plugin is to collect data from Campbell weather stations.

Usage

This plugin reads the data from Campbell weather stations, via Modbus serial or TCP. Data will be collected to the weather table. By default, it will collect data every 5 minutes, but can collect at a minimum rate of 1 second, depending on the speed of the serial connection. The plugin will make 1 attempt (by default) to read the data. The Campbell device CR1000 can be read via this plugin. The following data will be collected:
Variable Name Units
=====================================
Solar Radiation W/m^2
Incline Radiation W/m^2
Solar Radiation Tracker W/m^2
DIFF Solar Radiation Tracker W/m^2
DIR Solar Radiation Tracker W/m^2
Module Temperature 1 °C
Module Temperature 2 °C
Module Temperature 3 °C
Module Temperature 4 °C
Ambient Temperature °C
Relative Humidity %
Wind Speed m/s
Wind Direction °
Barometric Pressure mbar
Precipitation mm
Precipitation Daily mm
# These 3 variables are copies of:
# "Solar Radiation", "Incline Radiation", and "Solar Radiation Tracker", respectively.
GHI W/m^2
POA W/m^2
GHI Tracker W/m^2

Arguments

Arguments are as follows:
  • endpoint. This is either a serial device like /dev/ttyS0 or an IP or DNS like 192.168.1.15
  • configuration file. This is the configuration file for the device type. Choose from the list provided.
  • --bus_addresses. This is an optional parameter, defaulted to 1.
  • --port. This is an optional parameter used in an Ethernet gateway, and is the TCP port used for the gateway. Default is 502
  • --attempts. This is an optional parameter, and determines how many times to times to attempt to read an inverter value. Default is 1
  • --delay. This is the delay in seconds between inverter send and receive commands, AND if attempts > 1. Fractions like 0.3 can be used. Default is 0.05
  • --stop_on_any_command_fail. If this is specified, then any Modbus commands that fail will stop all further queries for all bus addresses and attempts.
  • --serial_lock. If this is set, the program can only be run one at a time (so as not to overload a Modbus device). If the device being queried is a serial device, this will automatically be set to "on". For IP addresses it is optional.
  • --sampling_rate. If this is defined, and the sampling rate is greater than 1, then all DECIMAL and SWAP16 values will be collected as an average. In other words; it will take a sample at the nominated frequency. After X samples defined by sampling_rate, a record will be written and sent to the cloud.
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Outline
Purpose
Usage
Arguments