Hi guys, whish you a nice 3rd advent ! I tried to reduce cpu clock-speed for saving power but without success - whats wrong?? Compiling and downloading is possible but with no affect: void setup(){ #define APB_CTRL_PRE_DIV_CNT; //Cpu-speed 8mMHz / 2 = 4MHz; //HB #define RTC_CNTL_SOC_CLK_SEL; APB_CTR...