DHT22 Temp reading drops 2 degrees after connecting CO2 MH-Z19B

[edwindred]

Hello,

I am running a Wemos D1 mini with ESP Easy
Connected are a
1. DHT22
2. MH-Z19B
Both are connected on the 5V (of the Wemos D1 mini)

wemos_dht_mh.JPG (61.29 KiB) Viewed 645 times

When running the DHT22 alone , the temperature reading is about 1,5 - 2 degrees Celcius higher , opposed to when I connect the MH-Z19B.

When i read the voltage values. With a normal multimeter, there is not much of a difference and if that was the issue. I would expect, one of the devices not returning a value. Now i added a Formula in Easpeasy to adjust it a bit more to the expected value, but that is not really the solution i would say.
Any ideas?


Firmware
Build:⋄ 20104 - Mega
System Libraries:⋄ ESP82xx Core bc204a9b, NONOS SDK 2.2.2-dev(38a443e), LWIP: 2.1.2 PUYA support
Git Build:⋄ mega-20191208
Plugins:⋄ 46 [Normal]
Build Md5: ffde61316ff9abf294525d4375efceb
Md5 check: passed.
Build Time:⋄ Dec 8 2019 18:04:38
Binary Filename:⋄ ESP_Easy_mega-20191208_normal_ESP8266_4M1M.bin