New firmware is ready to download, it support HW v0.3 and also new HW v1.0.

features:

 - display brightness control

- turn off display to protect pixels burning when is inactive for 15 minutes (wake up by pressing both buttons at once)

- increased maximum preset temperature to 500°C (only for HW v1.0)

https://github.com/pavelrevak/rt_soldering_pen/releases