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Product Introduction

The FLY-KPPM installation shutdown module is specifically designed for development boards like Raspberry Pi to ensure data security. It prevents data loss caused by power outages. With advanced technology, when a power outage occurs, it automatically switches to capacitor power, ensuring the development board can still operate stably for 15 seconds during the power failure, guaranteeing effective data preservation. Compact and convenient, it is easy to install.

Product Precautions​

Note

The input power only supports DC12-24V. When wiring, make sure to distinguish between positive and negative poles. Wiring must be done in a power-off state. Confirm that the wiring is correct before powering on. We are not responsible for any losses caused by incorrect wiring.

Note

The +5V at the 5V OUT socket is an emergency power output and should not be used as a regular power supply. Please use USB-OUT or SIG/IO to power the host machine.

Note

When using with the safety shutdown module, a 12V-24V power supply is required. To ensure normal module operation, 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 its internal boost circuit, keeping the capacitor continuously charged, which may cause the module to overheat.

Screen Display Content Explanation​

Screen Content ExplanationLeft Side ExplanationRight Side ParameterRight Side Explanation
IN:Input VoltageOUT:Output Voltage
CA:Total Capacitor VoltageOI:Output Load Current
C1:C1 Capacitor VoltageC2:C2 Capacitor Voltage
Temp:Safety Shutdown Module TemperatureE:Status Prompt, 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 off within 10 seconds and then powered on again, this prompt will appear, showing a countdown. After the countdown ends, restart the host machine.

Fixed Shell Model Download​

https://cdn.mellow.klipper.cn/STEP/KPPM.zip

Pin Description​

  • OUT-RST Reset

  • OUT-PDN Power Off

  • IN-PIN

    Default pull-up, the module automatically detects the last power-off time when powered on. If the power-off time is less than 10 seconds, it will wait for 10 seconds and automatically switch the 5V output once (ensuring the host machine completes shutdown and can be restarted). If connected to GND, it will disable the automatic detection of power-off time function.

FLY Host Machine Usage Tutorial​

info

Only applicable to FLY-Pi FLY-Pi-V2 FLY-C8

The FLY host machine needs to execute the following commands via SSH:

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 Machine Wiring Tutorial​

  • Connect FLY-C8 using 5V wiring, check the wiring diagram for correspondence.

Raspberry Pi Host Machine Usage Tutorial​

Similar to the above operations, for Raspberry Pi, insert the SD card with the system image into the computer. Add the command dtoverlay=gpio-shutdown,gpio_pin=21 to the config.txt file, then save and exit.

  • Connect Raspberry Pi using 5V wiring.