sensor_hub_code include code for nano (/sensor_clock_module) and esp8266 (/ntp-clockV3), connected each other by i2c (ESP master)/

All sensors: mh-z14 (CO2) TGS2600 (VOC) or any other analog sensor DTH22(H&t) connected to arduino, which collect information and send packet to ESP8266. ESP send data to web site (place web on hostinger)) https://github.com/sergkit/sensor