AirGradient Forum

Old AirGradient – Wi-Fi connected but LEDs keep flashing red/blue

Support
#1

Old AirGradient ONE – Wi-Fi connected but LEDs keep flashing red/blue

Hi,

I recently got an AirGradient monitor, but I’m not sure about the exact model or hardware revision. It seems to be a fairly old version.

After powering it on, I went through the Wi-Fi setup. From my router, I can see that the device successfully connects to Wi-Fi and gets an IP address. However, the LEDs on the board keep alternating between red and blue, so it looks like something is not configured or working correctly.

I opened the enclosure and found that it uses an ESP32-WROVER-E. I also tried connecting the USB-C port to my computer, hoping I could flash or at least get serial logs from it, but the computer doesn’t detect any USB/serial device. The USB-C port does power the unit.

Does anyone know what the red/blue alternating LEDs mean on this older model, and whether there is any way to get debug logs from it?

If the original firmware is no longer usable, is there a way to flash newer/custom firmware onto this board?

Thanks!

#2

Hi @skatou! Could you try doing a clean firmware reflash first using the instructions here? Check “Erase device” while doing this.

https://www.airgradient.com/documentation/kb/kb-firmwares-airgradient-one-i-9psl-open-air-o-1pst-and-open-air-max-o-m-1ppst-firmware-versions

After the reflash, please try getting the debug log again:

https://www.airgradient.com/documentation/kb/kb-diy-online-debug

Since this seems to be an older hardware revision, it would also help if you could send us a few photos of the device through a support ticket. That should help us identify the exact model/revision and advise further:

https://www.airgradient.com/support/