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Using KPPM

The FLY-KPPM shutdown module is a security module designed for development boards such as the Raspberry Pi, aiming to prevent data loss caused by power outages. It uses advanced technology to automatically switch to a capacitor power source when a power outage occurs, ensuring the development board can run stably for 15 seconds during a power outage, safeguarding effective data storage. Compact and convenient, it is easy to install.

Precautions

Notes

The input power supply only supports DC12-24V. When wiring, be sure to distinguish between positive and negative poles. The wiring process must be performed when the power is off. Confirm that the wiring is correct before powering on; the company will not be responsible for any losses caused by incorrect wiring.

Notes

The +5V at the 5V OUT socket is an emergency power output, not for regular power output. Please use USB-OUT or SIG/IO to power the host computer.

Notes

When using the safety shutdown module, it needs to be powered with 12V-24V. To ensure the module works properly, the 5V output voltage on the safety shutdown module board must not be lower than 4.9V. Otherwise, the safety shutdown module will draw power from internal boosting, causing the capacitor to remain in a charging state, leading to continuous heating of the module.

Screen Display Content Explanation

Screen Content ExplanationLeft ExplanationRight ParameterRight Explanation
IN:Input VoltageOUT:Output Voltage
CA:Capacitor Total VoltageOI:Output Load Current
C1:C1 Capacitor Voltage C2:C2 Capacitor Voltage
Temp:Safety Shutdown Module Temperature E:Status Prompt, please see below
Display ContentStatus Explanation
Ready!Normal Startup
IN LOW!Low Input Voltage
IN OVR!High Output Current
OV LOE!Low Output Voltage
OV OVRHigh Output Current
TP OVR!High Temperature
NONEUnknown Error
R: XX SecIf the power is cut within 10 seconds and then powered on, this message will be displayed. After the countdown ends, the host computer will restart

Pin Description

  • OUT-RST Reset

  • OUT-PDN Shutdown

  • IN-PIN

    Default pull-up, the module will automatically detect the time of the last power failure when it is powered on, if the power failure time is less than 10 seconds, it will wait until 10 seconds have passed and then automatically switch the 5V output once (ensuring the host computer completes shutdown and can restart again) If connected to GND, it will disable the automatic detection of power failure time function

FLY Host Computer Tutorial

info

Applicable only to FLY-Pi FLY-Pi-V2 FLY-C8 FAST system comes with it, no need to install

The FLY host computer needs to use SSH to execute the following command

sudo curl -kfSL --progress-bar https://cdn.mellow.klipper.cn/firmware/sun50i-h5-power-key.dtbo -o /boot/dtb/allwinner/overlay/sun50i-h5-power-key.dtbo
sudo grep -q "^overlays=.*power-key" /boot/FlyOS-Env.txt || sudo sed -i '/^overlays=/ s/$/ power-key/' /boot/FlyOS-Env.txt

Restart the system

sudo reboot

FLY Host Computer Wiring Tutorial

  • FLY-C8 Using 5V Wiring Check the wiring according to the picture

Raspberry Pi Host Computer Tutorial

The operation for the Raspberry Pi is similar to the above. The Raspberry Pi needs to insert the SD card with the system image into the computer, add the line dtoverlay=gpio-shutdown,gpio_pin=21 to the config.txt file, and then save and exit.

  • Raspberry Pi Using 5V Wiring
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