MH-Z19 only reports temperature when connected to ESP-01
Posted: 17 Jan 2022, 00:24
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 value of 5000 sometimes (500). The Temperature is changing as you can see in the log:
An ESP12E DevKit connected to the same MH-Z19C hardware but with firmware ESP_Easy_mega_20210503_normal_ESP8266_4M1M.bin the PPM Value is reported correctly.
Is it possible that the memory of the ESP-01 is not sufficient?
Should I use a different firmware?
Kind regards
Martin
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 value of 5000 sometimes (500). The Temperature is changing as you can see in the log:
Code: Select all
501427: MHZ19: PPM value: 5000 Temp/S/U values: 20/0/0.00
1501855: WD : Uptime 25 ConnectFailures 0 FreeMem 17424 WiFiStatus 3 ESPeasy internal wifi status: Conn. IP Init
1503425: MHZ19: PPM value: 5000 Temp/S/U values: 21/0/0.00
1505427: MHZ19: PPM value: 5000 Temp/S/U values: 21/0/0.00
1507425: MHZ19: PPM value: 5000 Temp/S/U values: 21/0/0.00
1509425: MHZ19: PPM value: 5000 Temp/S/U values: 21/0/0.00
1511425: MHZ19: PPM value: 5000 Temp/S/U values: 21/0/0.00
1513426: MHZ19: PPM value: 5000 Temp/S/U values: 21/0/0.00
1515425: MHZ19: PPM value: 5000 Temp/S/U values: 22/0/0.00
1517425: MHZ19: PPM value: 5000 Temp/S/U values: 22/0/0.00
1519425: MHZ19: PPM value: 5000 Temp/S/U values: 22/0/0.00
1521426: MHZ19: PPM value: 5000 Temp/S/U values: 22/0/0.00
1523425: MHZ19: PPM value: 5000 Temp/S/U values: 22/0/0.00
1525425: MHZ19: PPM value: 5000 Temp/S/U values: 22/0/0.00
1527425: MHZ19: PPM value: 5000 Temp/S/U values: 22/0/0.00
1529425: MHZ19: PPM value: 5000 Temp/S/U values: 22/0/0.00
1531425: MHZ19: PPM value: 5000 Temp/S/U values: 23/0/0.00
1531855: WD : Uptime 26 ConnectFailures 0 FreeMem 17424 WiFiStatus 3 ESPeasy internal wifi status: Conn. IP Init
1533425: MHZ19: PPM value: 5000 Temp/S/U values: 23/0/0.00
Is it possible that the memory of the ESP-01 is not sufficient?
Should I use a different firmware?
Kind regards
Martin