ESP32 Forum

Hi,

I would like to build a spectrum analyzer that monitors all the 80 ISM bands with a high update rate.
Can I use one ESP32-MINI to monitor one band? So that I can build this analyzer using 80 modules?

To be able to a ESP32-MINI to monitor one band I would need to be able to set the receiver to the frequency of one of the bands and then periodically read the received power level.

So is this possible? Does a ESP32 report the received power level? And how fast does it update this value?

I don't know what ISM bands you mean, but the ESPs' RF subsystem is made for WiFi/Bluetooth and most likely cannot be used to receive/detect arbitrary RF signals, and definitely not outside the 2.4GHz (/5GHz) WiFi/Bluetooth band.
Even if the RF hardware could in theory detect arbitrary signals, the closed-source Espressif software ("driver") needed to control the RF hardware cannot.

With the ISM band I ment the 2.4Ghz - 2.4835GHz range which BlueTooth uses. I tought that this was the ISM band. But now I understand that the ISM band is much more then that. The 80 bands of BlueTooth are good for me.