Hi Everyone.
Why is there MISO , MOSI , SCLK on the left and right side , what pin numbers is used on the Left side?
You can choose which set of pins to use.
In the image I posted you can see:
On the top left, the schematic of the ESP8266 module used in your ESP8266 - E12.
On the bottom left, the schematic of the pins of your ESP8266 - E12.
On the right, an image of the ESP8266 seen from below.
You can observe that the ESP8266 has 22 pins, with pin 1 being RST and pin 22 being TXD.
Pins 9 to 14 (CS0, MISO, GPIO9, GPIO10, MOSI and SCLK) are used for two purposes:
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To use the memory inside, (on image right SO8W), the module for firmware, sketches, and data (4 MB).
-
To use an external SD card for firmware, sketches, and data (4 MB).
Note: I'm not sure if the firmware is stored on the SD card.
In the schematic you will see that these SD boot pins are connected to the pins on the left side of your E12 module.
These pins should not be used as a general-purpose SPI.
Using this SPI for other purposes may cause errors in the normal operation of the ESP8266.
The general-purpose SPI pins are on the right side of your module.
I hope this helps.
And I thank anyone who identifies any inconsistencies in my post.
PS: ESP8266 inside squematic :
In the IO CONN diagram J1 is numberd Pin1 to 15 , J2 is also numberd 1 to 15.
The above mentioned pins 9 to 14 does not match J1 or J2 for MISO , MOSI.
Maybe I read it wrong?
The picture in post #1is from the site link you posted, thanks.
My board is the exact one from post#1.
OK , I used the MOSI,MISO,CLK on the right side and my TFT is working.
Just weird that there is no power led on this board.