Unable to update firmware

#1

I’m trying to update my new device to the latest firmware. Its an AirGradient ONE Indoor Monitor I-9PSL (Kit) with firmware 3.1.4.

I see the device when I click the link in Chrome. However when I try to run it I get this error:

Failed to execute ‘open’ on ‘SerialPort’: Failed to open serial port.

#2

Try the steps here under “BOOT Error During Flashing”
The AirGradient ONE Air Quality Sensor (Presoldered-Version, PCB Version 9)

If that doesn’t work, others have reported trying a different browser or restarting your computer may help free up the serial port.

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