Using a voltmeter to display the AC line voltage, adjust the calibration factor until the displayed voltage reasonably matches the voltmeter reading. Click save to update the channel with the new calibration factor.
Burden resistors are internal components that allow IoTaWatt to convert the input current to a voltage that can be measured. The factory supplied burden values were selected to work best with the range of CTs that can be connected and most users will never have a need to modify them or the corresponding values in this menu.
For the benefit of advanced users that have a need to remove or change the factory resistors, this menu has been provided so that a changed value can be specified and IoTaWatt can calculate the correct current using the new value.
The initial configuration places no restrictions on who can modify or otherwise access the device. If the device is in a home and connected to a well protected WiFi LAN, that may be adequate to protect the integrity of the device and privacy of the data collected. If the LAN does not provide suitable protection, or there is a need to provide port-forward passthough to the internet, access control is recommended.
IoTaWatt supports two levels of authorization using digest password authorization. This isn't the most secure method of authorization, nor is it the least. Given the limitations of an IoT device, you may find it is a reasonable balance between exposure and data value.
To enable authorization, specify an Admin password. Once there is an admin password, all configuration and access, except for User level acess described below, will require the password to initiate the session. Be sure to carefully note the password that you set, as IoTaWatt does not store the actual value and it cannot be recovered. There is a procedure to remove the Admin password, but it involves physically removing the SDcard.
The optional User level password is effectively a read only password for use by apps that visualize data. The User password does not allow access to the configuration or SD file system, except for a special /user/ directory
Tags are optional key-value pairs of metadata that can be associated with the measurement. Because they are indexed, queries on tags perform better than queries on fields.
When tags are specified, IoTaWatt assumes the first tag is unique to this measurement and is referenced to determine the time of last measurement during restart recovery. In that way, an IoTaWatt can maintain context and continuity where multiple data sources are writing to a single database.
Tag-values can be a fixed string, or one of the variables $device, $name, $units
Secure (HTTPS) internet connections are possible using a proxy server on the local LAN.
Information about setting up an NGINX proxy server and using this feature are included
in the IoTaWatt online documentation.
When you specify the URL of your proxy server here, uploaders and other services will use the proxy when https is specified.
Use this tool to permanently disconnect from the current WiFi network.
Press the restart button below to reset the IoTaWatt.
Restart can take up to 30 seconds, longer if loading new software.
After restart, refresh the browser window if this app fails to restart.
This is the only safe way to delete Data Logs.
The IoTaWatt will restart.
a new log will created beginning now.
a new history log will be built from the current log.
Click DELETE to confirm.
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