how do I know out the noise level on the channel?

[digital]

How to I know out the noise level on the channel on the esp32 ? WiFi or BLE



it is necessary to make a radio scanner

[Craige Hales]

What will you use it for?

Here are some WIFI thoughts...both ideas want some long term averaging...

1) I get signal levels from about -65 (very good) to -99 (very bad) from all the neighbor's beacons. If you have a always-on device at a fixed location and the ESP at a fixed location, you might use that signal level as a proxy for channel noise. -80 yesterday and -85 today is relatively more noise today.

2) In the US band plan you should use channels 1, 6, or 11. The other channels overlap and add noise. I pick 1, 6, or 11 based on how many neighbors are misusing the between channels...every time a neighbor transmits on channel 3, it raises the noise floor on channels 1 and 6. Channels 1 and 6 can't detect channel 3 is transmitting, so they may transmit at the same time, adding to channel 3's noise floor. But...you might use the number of beacons you hear in the 2 or 3 adjacent channels to each side as a proxy for noise in your channel.

Not a recommendation, but a concise discussion: https://www.metageek.com/training/resou ... ls-1-6-11/