This module helps reduces power usage of inactive mobile clients while another client is actively used. E.g. in the case of chatting on a desktop computer, instantly pushing messages to a phone in someones pocket is not the best use of radio time.
Works with mod_csi_simple which is included with Prosody since 0.11
With the plugin installer in Prosody 0.12 you can use:
sudo prosodyctl install --server=https://modules.prosody.im/rocks/ mod_csi_grace_period
For earlier versions see the documentation for installing 3rd party modules