Hari Wiguna has shared on Hackaday.io his interesting scheme of making a 16-channel Wifi remote using the ESP8266 and PCF8574 I/O expander chips. PCF8574 device provides an 8-bit I/O expansion for any microcontroller through an I2C
![16-channel remote control using ESP8266](https://easy-esp.com/wp-content/uploads/2016/09/remote1.jpg)
Hari Wiguna has shared on Hackaday.io his interesting scheme of making a 16-channel Wifi remote using the ESP8266 and PCF8574 I/O expander chips. PCF8574 device provides an 8-bit I/O expansion for any microcontroller through an I2C