ESP8266 Community Forum

The code uses a number of modules
#include <Arduino.h>
#include <ESP8266WiFi.h>
#include <SPI.h>
#include <SD.h>
#include <Ticker.h>
#include <Adafruit_ILI9341esp.h>
#include <Adafruit_GFX.h>
#include <XPT2046.h>

The XPT2046 library module compiles and works with the ILI9341 LCD in 1.6.5 ( no warnings)

Due to Multicast UDP issues in 1.6.5 I'm testing with the Arduino IDE 1.6.9 and staging version 2.3.0 rc1
In the compile I get the warning below but it does complete but the code when run is not working at all.

I don't know where to start with this warning.

The runtime failure ( screen doesn't initialize ) could be in the other modules but I need to first start by eliminating the XPT2046 warning.
I have some reservations about the Adafruit modules since they may be coded in a way that increases vulnerabilities to upgrading or using hardware not purchased from them.
Do others have issues with them working with 1.6.9?

[quote]
WARNING: Category '' in library XPT2046 is not valid. Setting to 'Uncategorized'
Build options changed, rebuilding all.

[/quote]

this is just a warning (library manager can't categorize this lib) and has no effect to your project at all ...

you could just go to the XPT2046 directory and edit library.properties to set the category.
See other libs as example.