On Tuesday, 21 July 2020 20:46:21 UTC+1, Dave Liquorice wrote:

(*) On 2.4 GHz only channels 1, 6 & 11 don't mutually interfere with
each other. If there is a strong signal on one of the other channels
it may well be worth picking 1,6, or 11 that is furthest away from
it.
Only if 20MHz channels are used. If two networks use 40MHz
channels then it is impossible to avoid some overlap.

John