Speed up: ESP32 MH-ET live mini 1.44 128x128 RED_PCB

[podaen]

Dear I have made my tft weather app on my esp32 and I used smooth fonts for my text. Now it takes about 3 sec to load all data an images. My question is how I could speed up this. I am using an sd card to load jpg from. Maybe I could make a screenshot to my sd card because I update the weather arround evry 1.5hours.

I tried to speed up the like this

//#define SPI_FREQUENCY  27000000
#define SPI_FREQUENCY  40000000

But the screen gets dizzy.

This where my settings when I started to program.

TFT_eSPI ver = 2.4.25
Processor = ESP32
Frequency = 240MHz
Transactions = Yes
Interface = SPI
Display driver = 7735
Display width = 128
Display height = 128

R0 x offset = 2
R0 y offset = 3
MOSI = GPIO 23
MISO = GPIO 19
SCK = GPIO 18
TFT_CS = GPIO 21
TFT_DC = GPIO 2
TFT_RST = GPIO 4

Font GLCD loaded
Font 2 loaded
Font 4 loaded
Font 6 loaded
Font 7 loaded
Font 8 loaded
Smooth font enabled

Display SPI frequency = 27.00

[Bodmer]

Determine what is taking up the time.
How have you stored the smooth fonts.

[podaen]

Soo generating a picture is not an option instead of displaying it? I'm loading jpeg's, bmp and fonds from the sd card. I change six times from font during filling the the screen and that's what causing it.

An other question, could the sdfat library be used instead of the sd library from the sdk? I have a lot of coding from the sdfat that I could use for other things to do.

[podaen]

Soo generating a picture is not an option instead of displaying it?

Stupid question of me. The different overlays I use are hard to catch all in one sceen.

[Bodmer]

Fonts stored in FLASH array are the quickest to load, see examples. Reducing the number of characters in the font helps too.