In the plugin store. Additional value sensor subtypes were added in pre-release 2022.1.1 which I forgot to release. Oops.
New feature: You can now write a custom Decoder that will be run for a device, to parse out complicated or encoded payloads and create additional custom states. There's an example Decoder included with the plugin that expands nested dicts in a JSON payload. Instructions in the next post.
The plugin now copies Decoders and Templates to subfolders of Python3-includes. This is now the only place these files are searched for. Plugin config dialog has been updated to remove the option to set the Templates folder. Users of the Template feature will need to move their existing templates to the new folder. This was done to make sure these files persist between Indigo updates.