The WifiManager is not able to store URLs which contains a port, e.g., 192.168.1.2:8000

The root cause is that WifiManager is storing the setting in a JSON file.

Adding "192.168.1.2:8080" should be handled as it a string. The log output is suggesting that the URL was saved.

*WM: [2] -------------------- 
*WM: [2] URL: "192.168.1.2:8080"
*WM: [2] -------------------- 

But it's not.

I am looking into adding mdns support to the co2ampel so that it can announce a webservice providing access to the current sensor data ... using the mDNS_Clock example as a basis.

The wifi config screen would be extended to provide an mdns name for the device

In connection with that I then intend to write a mobile app with flutter that shows the co2ampel services available on the local network with the option of sending a notification to the phone when one of them reaches a configurable PPM ...

so if anyone else is interested in this, please be in touch maybe we can join forces ...

Button not working (maybe only in my setup?)

++ #define BTNPIN 0 // D3 on Wemos D1 mini = 0

-- boolean btnPressed = !digitalRead(D3);
++ boolean btnPressed = !digitalRead(BTNPIN);

Hi

I‘m looking for a co2 sensor with MQTT support. So I could easy integrate it in homeassistant.

Any plan to integrate MQTT?

When compiled the LEDs do not work.

The LED PIN is defined as D8. However the GPIO PIN number needs to be used, which is 15.

--#define PIN D8
++#define PIN 15