@Belennn
Unfortunately, the AWR for the 3820 is not interchangeable with the 3810 and vice versa.
It is pretty difficult to just find the 3810 cable so replacement of the device is usually the only recourse. I used to recommend staying away from the Stick models due to these proprietary cables and opt for the streaming player models instead.
However, the streaming players (Express 3960, Express 4k/4k+ 3940/3941) are being discontinued (although will remain supported) and replaced by two new stick models. (3820. 3830, 3840 models). The only positive is that the Stick models no longer seem to need an AWR cable and will instead use a USB-A with USB-C power connector cable. (excluding the 3820 which still uses the proprietary AWR/LRWR).
https://www.roku.com/products/players
----
If you do decide to purchase another Stick, perhaps avoid the 3820 as this cable will likely become discontinued in the future similar to the 3810 and you will likely find yourself in the same boat.
Roku Community Streaming Expert
Just another Roku user... I am not a Roku employee.
Insignia RokuTV, Ultra 4660, 4802, 4850, Premiere+ 3921, Express 4k+ 3941, Streambar 9102
