Datenblatt MH-Z19B https://www.winsen-sensor.com/d/files/MH-Z19B.pdf Hardware LoRa-Shield https://github.com/TheNitek/WeMos-Lora/ Software Tasmota-Code https://github.com/arendst/Tasmota/blob/c97ea4d9176eb7e87abff5f963a0f1c60f0a5e52/sonoff/xsns_15_mhz19.ino