Datasheet

Flyport Wi-Fi and Ethernet Programmer's guide framework 2.3 (rev 1.0) www.openpicus.com

Advanced Features

In this chapter are shown some advanced features of the openPicus Framework. It is suggested to first learn

and use the standard functions of the Framework. The advanced features described below can lock the overall

system if used incorrectly.

The Energy Saving Modes

(Flyport Wi-Fi Only)

The openPicus Framework permits using advanced energy saving methods. This is an advanced

feature, and the Flyport's normal operations and functions will be different, and all the TCP/IP related

functions do not work in these modes. As a general rule, when in an energy saving mode, none of the

functions described in the chapter “Using the TCP/IP stack” should be used since are all TCP/IP

dependant.

There are two ways to reduce power consumption:

• Turn OFF Wi-Fi transceiver only (Hibernate mode)

• Turn OFF Wi-Fi transceiver and put in SLEEP state the microcontroller (Sleep mode)

Both modes turn OFF the Wi-Fi transceiver to save power, but the Sleep mode saves more power

since it stop the Microcontroller. Only the RTCC and external interrupts can wake up the

Microcontroller once it is in sleep mode.

Special considerations:

All the TCPSockets and UDPSockets must be reinitialized after waking up from hibernate or sleep

mode. This must be done each time the Flyport Wi-Fi wakes up, and for every Socket used, or the

Flyport will fail its tasks executions and will definitely be locked!

Please pay very special attention to socket handles as these are the most delicate software code for

power saving modes.

Hibernate Mode

Activating Hibernate mode, the Wi-Fi transceiver will be turned OFF, the OpenPicus Framework will

kill the TCP task, and only the user task will be executed. This is not the maximum power saving

mode, but PIC is still powered.

The functions described in “Controlling the Flyport hardware” chapter, and “RTCC peripheral module”

can be used without any kind of warning as they are only PIC dependant.

To Activate Hibernate Mode → WFHibernate();

This function activates the Hibernate mode, so turn OFF the Wi-Fi transceiver

To Deactivate the Hibernate Mode → WFOn();