I disabled the the settings as proposed. But with no effect. After some Inverstigation I found the Solution. The MH-Z19 needs 5V Input Voltage to work properly. I was confused by the Technical data stated "Working voltage 3.6 ~ 5.5 V DC". But this dose not mean that it can work with this v...

Hello ESPler., Hoping sombody had the same problem with an solution. I try to us an MH-Z19C Sensor with an ESP-01 Board with fimrware ESP_Easy_mega_20211224_normal_ESP8266_1M.bin. (I also tried older fimware with the same result) The sensore only reports the correct temperature an always reports PPM...