I have a use case in which we have a host processor that could be powered off with the EC25 active and sleeping if it has nothing to do.
If the EC25 gets a “RING”, the host processor will be awakened by another low power processor.
I’m using USB communication between host and EC25.
If I understand sleep control, I believe I need to do the following:
- Ensure WAKEUP_IN is set to high to allow sleep (seems the name is backwards).
- Set AT+QSCLK=1
- Set USB_VBUS = low
Is WAKEUP_IN needed to control sleep on the EC25 or can I just leave it disconnected? It seems like this might have been provided to allow external hardware to prevent sleep for some reason.