EE895 An Arduino library for the EE895 CO2 sensor manufactured by E+E Elektronik Ges.m.b.H. Hardware setup D1 Mini on WeMos D1 Mini EE895 is supplied with 5V SDA on GPIO 4 / D2, 4k7 Pullup to 3.3V SCL on GPIO 5 / D1, 4k7 Pullup to 3.3V