====== Firmware upgrade on GMMZ Stream V3.1 ======
  * Download the firmware from [[http://www.gmmz.tv/%E0%B8%94%E0%B8%B2%E0%B8%A7%E0%B8%99%E0%B9%8C%E0%B9%82%E0%B8%AB%E0%B8%A5%E0%B8%94/|GMMZ]]. The site is in Thai language, but understandable after enabling auto-translation in Google.
  * After unzipping, copy the the level with the file "factory_update_param.aml" to a USB stick. Modify the line with the path to the firmware image and add the folder name after "/udisk/", for example:<code>--update_package=/udisk/22022019/u2x-update-20190222.zip</code>
  * Disconnect power, then push and keep the reset button inside of the AV connector, and reapply power. The firmware update will execute without further interaction.