Hello, I am running the "central multilink" example project UART connected with HWFC to an external host. The NRF51 adds about 3 uA of sleep current to the system and wakes on CTS as expected. However, during sleep there is something running exactly every 4 seconds that consumes power. Whatever is running does not return from sd_app_evt_wait() or appear to generate an interrupt. The project is running on a Raytac module only -- not the full DK. No debugger is attached. UART is configured as APP_UART_FLOW_CONTROL_LOW_POWER. Any ideas on what this might be? Thank you.
