Left button: This button is currently unused. We have added it for future feature releases, but at the moment pressing it won't do anything.
Right button: When the sensor is connected to wifi, pressing the right button will get you an immediate reading of all your parameters. Feel free to do this if you don't want to wait for the next automatic reading. There is a limit of 3 presses per 15 minutes for this button.
If you hold the right button down for 6 seconds, it will eventually start to blink blue. This allows you to re-add the sensor to a WiFi network or reconnect the unit if you are running into connection issues.