Test of mic and speaker with Raspberry Pi zero
Follow instructions http://wiki.seeedstudio.com/ReSpeaker_2_Mics_Pi_HAT/
use install for pyaudio >> sudo apt-get install portaudio19-dev python-pyaudio python3-pyaudio
For filtering https://healthyalgorithms.com/2013/08/22/dsp-in-python-active-noise-reduction-with-pyaudio/
Raspberry Hotspot config https://www.raspberrypi.org/documentation/configuration/wireless/access-point.md
wifi reboot: sudo wpa_cli -i wlan0 reconfigure