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Download the new firmware binary from here https://playground.github.io/liquid-prep-web-tools/wifi-ble/firmware.bin
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Turn on ESP32 by pluging it to a computer via USB cable
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On your computer, change the WiFi to join “esp32ap”
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Once your computer has joined “esp32ap”, a portal should pop open.
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If the portal didn't pop open, you can access the portal by going to http://172.217.28.1/_ac/config
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Select "Configure New AP" from the menu options
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Your WiFi AP should be listed as one of the options
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Select the WiFi you would like join
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Provide the passphrase to join your WiFi, if you want to assign a static ip to the sensor, uncheck "Enable DHCP" then key in the proper values.
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Click "Apply" to save the settings. After it's saved successfully, join back to your home WiFi.
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You can now access the ESP32 UI by going to http://the-assigned-ip-of-this-esp32/_ac/update
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Choose the file (firmware.bin) you have downloaded
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Click "Update" to upload the new firmware.bin. If upload is successful, it will reboot itself. Congratuation! You're done.
