Hi Guys
I am new with the theme of arduino and microcontrollers, but I urgently need help to send data via serial from a sparkfun weather shield that is connected to an arduino one to a nodemcu, so that this later sends the data via wifi to a base of data.
What has i2c got to do with this?
Also, perhaps it might be simpler to disconnect the weather sensors and hook them directly to the Node-MCU, thereby allowing arduino to be gainfully employed elsewhere.
Serial and I2C are two different things.
Assuming you have a 5V Arduino you'll need level shifters to not blow your NodeMCU's pins no matter what.
Indeed if you don't have too many sensors just connect them straight to the NodeMCU and move the Arduino out of the way.