Hi Koy,
When you turn on the Nextion, regardless of the Nano connection, you should get the KD8CEC screen. ?If not, there was an error loading the screen from the micfoSD card. ?You must also remove the card after the load into the Nextion. ? What I do is remove power after the screen loads from the microSD card, remove the card, and verify the correct screen coms up after applying power again.
If the above checks OK, verify the wiring.?
One other point, the stock regulator on the Raduino board can only supply a 3.5¡±. Nextion display. ?If you have a larger than 3.5¡± display the regulator could be dropping out with the power required to change frequencies.?
73
Evan
AC9TU
