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Samsung Refrigerator Integration

Overview

My fridge is an: RF23M8070SR

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Samsung WiFi Dongle

I purchased the Samsung Smart Home Adapter (HD39J1230GW) to integrate the kitchen fridge (Samsung RF23M8070SR) with Home Assistant. The dongle works poorly so I'd like to figure out how it works to see if I can improve it's functionality. There are no datasheets available, so comparing the images below, it appears that the "USB" connector is actually carrying a UART serial port signal.

This makes sense since the cabling to the port on the fridge is not shielded and due to the level shifting FETs on the top-left of the board.

The dongle uses the Qualcomm QCA4531 SoC: - https://www.qualcomm.com/products/technology/wi-fi/qca4531#Overview

Teardown

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USB Pinout

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Qualcomm QCA4531 SoC

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References

Refrigerator System Board

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Last update: 2023-03-30