Levoit Air Purifier Integration for ESPHome

Supported Devices

• Levoit Core 200s (Confirmed)
• Core 300s (Confirmed)
• Core 400s (Confirmed, thank you @SeveranExp)

Disassembly

For details on the teardown, please read this blog post. * Place device upside down and remove base cover and filter. * On the Core 300s, 8 screws will be exposed, 4 black screws and 4 with washers attached. * On the Core 200s, there will only be 4 screws with washers attached. * Remove all exposed screws. (Be careful, these are made out of a soft metal.) * Using a pry tool, press into the tabs and gently separate the two pieces. * Completely separate the base (holds the filter) and the top (holds the fan). * Slide the entire fan out of the top. * Unplug logic board from the fan. There's a clip, on the plug, that must be pressed in order for the plug to be removed.

Flash

• Copy the provided sample configuration for your model to a new ESPHome configuration, while keeping the generated passwords.
• Compile and download the binary (Choose the modern format once compilation has completed).
• If using esphome on the command line, run esp compile levoit300s.yaml. The modern format binary will be located in .esphome/build/levoit300s/.pioenvs/levoit300s/firmware.factory.bin.
• Solder wires to pins TXD0, RXD0, IO0, +3V3, and GND near the ESP32 on the logic board, and connect these to a USB UART converter. On some boards, if these are through holes, soldering may not be necessary.
• The Core 200s has a spot for +5V and no IO0.
• Connect IO0 to ground while applying power to boot into the bootloader.
• If no IO0 is available, use the GPIO0 pin directly on the ESP32 (right side, very bottom).

Backup Existing Firmware

esptool read-flash 0 ALL levoit300s-stock_firmware-$(date +"%Y%m%d").bin

Erase Flash

esptool erase-flash

Install New Firmware

esptool write-flash 0x00 esphome-firmware.bin

Disconnect and reconnect the USB UART to make sure the ESP32 restarts. Once powered, check to make sure the ESP32 connects to your wireless network.

After confirming, reassemble, and enjoy :)

Contributing

All contributions are welcome! Please open an issue or a PR.

Contributors

• Aiden (@acvigue) - Original code & Core300s support
• Ryan Lang (@ryan-lang) - Core400s support
• Havarius (@Havarius) - Core200s support
• Haydon (@haydonryan) - Documentation & testing