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HOBOware heap error and aborting error work-around

HOBOware Java VM aborting message HOBOware 3.4+ (HOBOware 3.4.0 or higher only) HOBOware fix for “heap error, and aborting error.” This new command-line fix can make HOBOware work by modifying the shortcut for starting HOBOware.
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3-phase Wattnode product comparison

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RX3000 & U30 Networking, Firewall Problems

Network firewall difficulty: The network interface controller (NIC) in the HOBO RX3000 and U30-ETH and WIF will attempt to make a connection to the numerical IP address 208.85.146.151:54328 every "Readout Interval." Your firewall must allow the logger to connect to this IP address, and must also allow the MAC address of the logger NIC.
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U12 input impedance

This note looks at input impedance characteristics of the HOBO U12 loggers with external inputs. "Rs" and "VA" in the attached diagram represent your source impedance.

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Verifying RH accuracy on HOBO data loggers

Testing the accuracy of relative humidity sensors requires carefully-controlled conditions and a considerable amount of time. Please see the white paper Testing the Accuracy of Sensirion Relative Humidity Sensors in HOBO Data Loggers for complete details on the recommended procedure to follow.
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Connecting a 4-20mA to an external input

The 4-20mA cable (CABLE-4-20mA) measures currents from 0 to 20.1mA. The cable must be connected such that the current flows through, and with the proper polarity, as shown in the diagram. (Do not expose to current above 20mA or negative current.) Do not cut off the end of the gray cable where it connects to the blue and yellow wires, as this contains the precision resistor required for current measurements.
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Smart sensor cable fix

Problem: My smart sensor data shows a -888.888 for a good portion of the data file. Note: -888.888 means that the logger could not find the smart sensor after the logger was launched successfully.
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Tattletale 8 Squishy Bus conversion

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U30 and excitation wiring with S-VIA-CM14 modules

Here is a wiring diagram for use with external sensors and the S-VIA-CM14s. Remember the excitation current required to power the external sensors cannot exceed 50 milliamps total. http://www.onsetcomp.com/files/U30%20VIA%20and%20S_VIA_CM14.JPG
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SMS text messaging

Sending SMS through mobile phones is easy. If you can be reminded through email, you can now be reminded through SMS.
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