I added a task to ble_app_hrs_freertos.
The soft device was burned.
The address is in the default state. (RAM:0x20002128 ROM:0x1f000)
I reset the total heap size.
(#define configTOTAL_HEAP_SIZE ( 42*1024 ))
The SDK version is 12.2.0.
I connected the SB10 for 3.3V output.
The task has about 5,000 bytes of buffer.(Declaration outside)
Then, PWM and UART are used.
Naturally, it works very well when only one task is run.