User's Manual

User Manual
SK509-W-2S-N is a wifi Wireless’s socket , It is powered by 125Vac，the hardware include
one keyswitch, one wifi chip（BK7231) ,two outputs and two blue LEDs.Its working principle is
divided into:The Smart Phone control socket through the internet or 4G net. BK7231
responsible for the function keyswitch signals are transmitted to a control part.Control part
based on the keyswitch information,control LED and RELAY output ON or OFF.
The shell side of the appliance has one button and two indicators. There are two types of
keystrokes: tap and long.
·Tap the switch to control the socket, the light is on when on, and off when off；
·Press and hold into the EZ distribution status, the light flashes, at this time can be in
accordance with the EZ configuration method for the distribution of the network;
·Press and hold again when flashing, will enter the AP distribution status, the indicator
flashes slowly, at this time according to the AP configuration method for the distribution.
Note:The SK509-W-2S-N has a power-down memory function that will be noted by the device as long as it remains
ON or OFF for 5 seconds and will return to this state after the next power-up.
1
、
CPU
BK7231 is a 2.4 GHz 802.11n chip with multi-media feature. It integrates hardware and
software component to finish a complete 802.11b/g/n application, which supports AP and STA role
simultaneously. It is able to support multiple cloud links.
• Programmable RAM/ROM interfaces (iBus), which can be connected with
memory controller, and can also be used to visit flash.
• Data RAM interface (dBus), which can connect with memory controller.
• AHB interface which can be used to visit the register.
• External 26MHz OSC provide a basic clock speed,
Then the clock speed is increased to 80MHz through
the internal PLL circuit
2,Memory
BK7231 Wi-Fi SoC integrates memory controller and memory units including SRAM and
ROM. MCU can access the memory units through iBus, dBus, and AHB interfaces. All
memory units can be accessed upon request, while a memory arbiter will decide the
running sequence according to the time when these requests are received by the
processor.
According to our current version of SDK, SRAM space available to users is assigned
as below.
• RAM size < 50 kB, that is, when BK7231 is working under the Station mode
and connects to the router, programmable space accessible in heap + data section
is around 50 kB.
• There is no programmable ROM in the SoC, therefore, user program must be stored
in an external SPI flash. BK7231 uses external SPI flash to store user programs, and supports up
to 16 MB memory capacity theoretically.
The high frequency clock on BK7231 is used to drive both transmit and receive mixers.
This clock is generated from internal crystal oscillator and external crystal. The internal
calibration inside the crystal oscillator ensures that a wide range of crystals can be used,
nevertheless the quality of the crystal is still a factor to consider to have reasonable phase noise
and good Wi-Fi sensitivity.
3,Power Management
BK7231 is designed with advanced power management technologies and intended
for mobile devices, wearable electronics and the Internet of Things applications.
Model：SK509-W-2S-N