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...
X1 shield ESp8266 OLED learning kit
More ill advised purchases from far eastern electronics sites, you bet. This is another collection of ESP8266 boards and shields that I acquired, on...