Wemos and MQ-4 gas sensor
The MQ-4 Methane Gas Sensor is a gas sensor that detects the presence of methane gas at concentrations from 200 ppm to 10,000 ppm, a range...
Wemos mini shields
In a previous post I looked at the Wemos Mini - http://www.esp8266learning.com/wemos-d1-mini-hardware.php. I also noticed that there were a number of shields that you can...