Hey! Thank you for your time. Im trying to establish serial communication between an arduino and a node mcu (esp8266). I wrote a simple a sketch to send and recieve data. Everything works fine when i connect the tx and the rx together, bur i read that this can harm the esp due to the diferent serial voltages. I built a simple divider with resistors but when i use it the devices cant communicate. What im i doing wrong? atached a picture of the schematic.