Requirements

You need	Details
Ignition	8.1.33 or newer in the 8.1 line, or 8.3.3 or newer in the 8.3 line
Maker Edition	Supported: both module files are Maker Edition compatible
Gateway access	An administrator login to the gateway
Licence	None. The module is free

Which file goes on which gateway

Each Ignition version line has its own module file. Install the file that matches your gateway's version line:

Your gateway	Module file
Ignition 8.1.33 or newer	`Psychrometrics-0.1.0-Ignition-8.1.modl`
Ignition 8.3.3 or newer	`Psychrometrics-0.1.0-Ignition-8.3.modl`

Both files have the same module ID, com.nedama.ignition.psychro, so a gateway upgraded from 8.1 to 8.3 recognises the module.