How to update the firmware in TellStick and TellStick Duo

TellStick must be from batch 11 or later to support upgrades.
All batches of TellStick Duo support upgrades.

Choose your operating system below:

Windows XP Windows 7 Mac OS X


Q: I have updated the firmware in TellStick Duo, but want to downgrade again. How do I do that?
A: Download an older firmware (, stop the service as described in the guide, drag-and-drop the .hex-file to TellStickFlasher.exe (located in your TelldusCenter installation folder), and follow the instructions.