[russellb]

Hi,

Seems there are progresses:

Code:

I2Scanner now gives:
Scanning...
I2C device found at address 0x50  !
I2C device found at address 0x68  !
I2C device found at address 0x76  !
done

I2C devices are now detected correctly.

Code:

ESP8266 FW Version: AT+GMR

AT version:1.2.0.0(Jul  1 2016 20:04:45)
SDK version:1.5.4.1(39cb9a32)
Ai-Thinker Technology Co. Ltd.
Dec  2 2016 14:21:16
OK
Mode station OK
Multiple mux OK
Join AP failure
WiFi connection is OFF

I had noticed the 3.3 v regulator getting hot, that is now behaving normally.

However the display continues to behave the same.

I have //   Internet Settings
// --------------------------------------------------------------------------------------
#define ENABLE_INTERNET     1                        // 1= Enable Internet connection, 0= Disable


and Wi-Fi credentials are in and valid, but still not connecting to the router

From this I can see that there is communication between the Meduino and the WiFi module, so despite it is not connecting to your WiFi network, seems that the WiFi module is working.
Check if your are not using any special chars (char above ASCII 127) in both WIFI_SSID and WIFI_PASSWORD (and in your router too, obviously).
(There are also reports that the ESP8266 modules may have problems to connect with some older router - Foneras is one of the cases).


Regarding the TFT display, its not easy for me try to guess what is happening:
Firstly the model of your TFT display is different (PCB is quite different) from the recommended model, however, at least, the display should work, but I can't assure that. Considering that you have two TFT displays, and both are not working, and supposing that those displays are compatible, or there is a problem with the connections with the TFT, or in the worst case, the logic level converter chip is damaged (hope not). My best guess is for double check the connections to the TFT display.
Leave SDO(MISO) unconnected, this signal line is not used.

Thanks, I've checked the wiring (again) and can't find any errors.
so I've bitten the bullet and ordered a new display from one of the recommended suppliers.
Meanwhile I'll try climbing the steep learning curve of Arduino interfacing, and see if I can achieve anything with the ones I have.
Hopefully may have an update in a few weeks.