Connect LED to Open EVSE with free pin

[DylanVautrin]

Hi !
After looking at this issue : lincomatic/open_evse#98
I tried to connect RGBLED to open evse without I2C, so after looking for free pin , i've undefined the RGBLCD to use pin of the LCD in first time, but when i try to write a HIGH/LOW levels on pin SDA, the Open EVSE restart continually.
I used the shortcut "SDA" in the code.
Maybe i do something wrong, someone have a solutions or a different way to proceed ?
Thanks
PS: I just do a digitalWrite(SDA,HIGH);