MH-z19B giving wrong values
Posted: 14 Jan 2019, 09:56
Hi,
I am using the MH-Z19B sensor to retrieve CO2 ppm values. The sensor is giving values over 5000ppm. It usually starts at 410ppm and after a minute, jumps to 5700.
The sensor itself works fine as I can get correct values when plugged in Raspberry Pi. Usually between 500 and 700ppm.
I am currently using built ESP_Easy_mega-20190110_normal_ESP8266_4096.bin, but also tried few previous built with same results.
sensor is connected to D5 and D6 for Tx and Rx.
I have attached the output from tools\show JSON if that helps.
If anyone has come across the same issue and found a solution, I would be grateful for info. Or it could be I am doing something wrong.
I am open to suggestions
Thanks
I am using the MH-Z19B sensor to retrieve CO2 ppm values. The sensor is giving values over 5000ppm. It usually starts at 410ppm and after a minute, jumps to 5700.
The sensor itself works fine as I can get correct values when plugged in Raspberry Pi. Usually between 500 and 700ppm.
I am currently using built ESP_Easy_mega-20190110_normal_ESP8266_4096.bin, but also tried few previous built with same results.
sensor is connected to D5 and D6 for Tx and Rx.
I have attached the output from tools\show JSON if that helps.
If anyone has come across the same issue and found a solution, I would be grateful for info. Or it could be I am doing something wrong.
I am open to suggestions
Thanks