WEMOS D1 mini IO pins

Projects Networking, Protocols, and Devices
1

I've noticed I can't use certain IOpins when running the WEMOS D1 mini, esp8266.
When I run the simple LED blink example which blinks TX pin. Pin D4/2 is taken up and blinks the reverse of TX, like is on when TX is off and vice versa. When using the WIFI, pin D3/0 & D4/2 are used.

Is this normal?

2

Solved it. The pins read high. I just needed to set the pins to LOW on setup.

pinMode(D1, OUTPUT);
digitalWrite(D1, 0);
pinMode(D2, OUTPUT);
digitalWrite(D2, 0);
pinMode(D3, OUTPUT);
digitalWrite(D3, 0);
pinMode(D4, OUTPUT);
digitalWrite(D4, 0);