Thanks. I changed mysgw configuration to use an interrupt (https://www.mysensors.org/build/orange#improving-throughput-for-nrf24). So now it takes much less CPU. After that, all processes take around 105Mb of memory and around 10-30% of CPU.

Hello,

Could someone help me to find why the system always uses around 98% of CPU?
UPD: Some more datails:
1 mysensors gateway
1 attached sensor
no other special logic, I've just installed the app.
After some time orange pi stops to respond