SPI display does not work with ESP32 & Alexa

[AntonioTesta]

Does anybody know why a SPI TFT Display does not work with ESP32 using the library Espalexa.h ? It seams to be some kind of conflict between timers pins maybe used by Espalexa.h and SPI pins... but I can not be sure about that suspecius... My SPI pins are those standars: CS=15, RST=4, DC=2, MOSI=23, CLK=17, MISO=19, without any other connection. After Espalexa functions are called the display shows only strange things and colors !!!

[AntonioTesta]

I also tried some other pins for CS but the result was the same...

[Idahowalker]

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If you are using a 9V battery like this.

Don't.

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Info about multi-things

Demonstration code for several things at the same time

NOTE for newcomers. The demo is entirely contained in this Post and Reply #1. There is no need to read further unless you are interested. ...added 25Sep2014 There have been a few occasions recently where newcomers seemed to have difficulty applying the "blink without delay" and "state" concepts to a sketch that is intended to manage a number of concurrent actions. Its very time consuming to respond with suitable code examples - particularly as every case is a little different. I have prepared…

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I2C scanner

https://www.arduino.cc/reference/en/libraries/i2cscanner/

Arduino | How to Scan and Detect I2C Addresses | Adafruit Learning System

What did the I2C scanner report?

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Bread board power rail split

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Serial Input basics.

Serial Input Basics - updated

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The search box is a useful tool.

For instance, using the words "9v battery" in the search box one could find lots of reasons why this may be a bad idea.

Other search words include "level shifter", "round", "millis()",
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code merging

How to combine two Arduino sketches | Arduino FAQs

http://www.thebox.myzen.co.uk/Tutorial/Merging_Code.html

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Servo stuff

Power externally.

Arduino : How to Use a Servo Motor With an External Power

power distribution blocks.

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[AntonioTesta]

Your long and detailed suggestion & rules does not apply to my case but thanks anyway !!!