arduino-co2 Some CO2 sensors with Arduino for IER-UNAM DFRobot SEN0219 - Gravity Analog Infrared CO2 Sensor Winsen MH-Z14A - the one used by SEN0219 TelAire T3022 - IP65 CO2 Sensor for OEM Installation DFRobot SEN0220 - Infrared CO2 Sensor 0-50000ppm SenseAir S8 - LP Miniature CO2 Sensor Module 4-digit 7-segment LED display Show CO2 ppm values in simple LED display TODO Make libraries for each sensor Use GPL 2.0 or later (C) 2021, Héctor Daniel Cortés Gonzalez hdcg@ier.unam.mx (C) 2021, Instituto de Energías Renovables http://www.ier.unam.mx/ (C) 2021, Universidad Nacional Autónoma de México http://www.unam.mx/