16-channel
There are 3 repositories under 16-channel topic.
allenxiang/gt-esp32
Home brew ESP32 curity panel with 4 channel relay, 19 channel GPIO, bluetooth, wifi, ethernet, screw terminals.
MarphXL/De-Multiplexer
CD74HC4067 - 16-Channel Analog/Digital Multiplexer/Demultiplexer
cctweaker/ESPlights
Multi channel WiFi mains voltage controller software & hardware based on the ESP8266.