i got a cheap BT mouse that goes to sleep after 10 minutes of inactivity. I have to use a button to wake it. It takes 2 or 3 seconds till the mouse reconnect and responds to the moves. Thats anoying. It has a CYW20730 BT chip (which was a BCM20730 before) and a 24C128 TSSOP EEPROM. Is there a chance to change or disable the deepsleep behavior? I grabbed a 16k eeprom dump and inspect it with ghidra. But because it's thumb code it's hard so find something. I can see BT link key but no information about power management.
are you sure that firmware into eeprom, not into bt chip?