I read about the max distances on different data communications.
My project is about a magnetometer on an antenna tower indicating azimuth direction. More exactly a HMC5883 board. The HMC will be like 30 meter from the house, where I need to see the value. I read that the I2C prrotocol can't handle that distance. Also moving the whole arduino outside, but with that method I can't connect a small LCD display in house.
What do you reccomand?
I thought about buying 2 arduino boards, putting one of them at the tower and the other one in house and connecting them with CAT5 cable as a SERIAL connection.
Do you have any other cheaper / safer ideas?