Goouuu-S1 ESP8266
This is an ESP8266 based board, in case you buy one of these here is some info I have found
Goouuu-S1 ESP8266 WiFi module is...
Wemos and MQ8 Gas Sensor
The MQ8 Gas Sensor module is useful for gas leakage detection. They are used in gas leakage detecting equipments in home and industry, are...