In my evaluation, the effective range from Wifi AP was short:
Matrix(n=2) - 5m
Lite(n=2) - 8m, 10m
And also, I found the IO0 port driven by CH552 is 3.9V@ESP32. This level is NG in Absolute Maximum Ratings of ESP32. With another ESP32 device - Wemos D1 R32 - I found same issue and reported it to espressif github issue :
Just an experiment (NOT solution), I connected IO0 to 3.3V of Lite, then the effective range was expand from 8m(purple) to over 14m(light blue) (n=1).
I wish the improvement by CH552 VCC 5V->3.3V on next board rev of ATOM lite and matrix.