When the Nordic nrf51422 board goes in system off state (sd_power_system_off), is there a way to wake it up using an external ANT payload?

[Roshan007007]

I am trying the ANT-OTA DFU Update using an ANT Stick and the nr51422 pca 10028 boarde and s210 soft device. My firmware makes use of sd_power_system_off(). If I have an update available, is it possible to wake up the firmware using a payload akin to the payload used in the OTA Tester App to push the board to bootloader mode?

[Petter Myhre]

The system can be woken up from System OFF mode either from the DETECT signal (when active) generated by the GPIO peripheral, by the ANADETECT signal (when active) generated by the LPCOMP module, or from a reset.

See Section 12.1.5 in the nRF51 RM v3.0 for more information.

[Roshan007007]

Considering I want to wake up the board for OTA using an ANT Payload from another nrf51 board, which mode of sleep would be ideal? (considering the board can't be woken up from the System Off Mode externally).

[Petter Myhre]

We only have two modes, System OFF and System ON. You can't be in System OFF if you are using the radio, so you have to be in System ON.