Ok, so as far as it seems, the official 12V/2A PSU that I bought along with the M4+SATA Hat can provide enough power to my setup. It has been running for a couple of days and everything seems 0K. The 12V/2A PSU is powering: ⋅ The NanoPi M4 ⋅ Two WD Red 3.5" HDDs which are la...

According to RK3399 Wiki / PWM you need to enable the PWM pin (as root): Export PWM0 to users echo 0 > /sys/class/pwm/pwmchip1/export Control a PWM fan's speed by setting the PWM's period and duty_cycle. echo 0 > /sys/class/pwm/pwmchip1/pwm0/enable echo 50000 > /sys/class/pwm/pwmchip1/pwm0/period ec...

According to RK3399 Wiki / PWM you should (as root): Export PWM0 to users echo 0 > /sys/class/pwm/pwmchip1/export Control a PWM fan's speed by setting the PWM's period and duty_cycle. echo 0 > /sys/class/pwm/pwmchip1/pwm0/enable echo 50000 > /sys/class/pwm/pwmchip1/pwm0/period echo 1 > /sys/class/pw...

Hi! I've just bought a NanoPi M4 (the 2GB version), with the SATA hat and the 12V/2A PSU. My intention is to have two 3.5" 5400rpm WD NAS HDDs connected, but I am not sure if the 12V/2A PSU will be enough to power both the HDDs and the M4 board. The description page of the SATA hat says that: A...