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Xinyuan-LilyGO / LilyGo-T-Call-SIM800

https://www.aliexpress.com/item/33045221960.html
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TCall SIM800 Cannot connect to ST7789 lcd display #135

Closed danluigitating closed 3 years ago

danluigitating commented 3 years ago

Hi to Liligo Team!

Thank you for providing us with this almost perfect microcontroller for IOT projects (TCall Sim 800)!

I am having a problem, I wanted to integrate a ST7789 LCD display module and seems there are no specific guide or instructions for doing this.

Based on the pinouts of SIM800L_IP5306, I used the SPI Pins (VPSI MOSI, VPSI SCK and VPSI SS) using Adafruit ST7789 or the TFT_eSPI library but only shows blank screen with backlight. I also tried to manually edit the setup of the library but it also does not work.

Also, there is no specific board for T-Call SIM800, I used the TTG0 T1 in the Arduino program.

See this pinout of the module to the microcontroller LCD -> TCall VCC -> VCC GND -> GND DIN -> VPSI MOSI (Pin 26) CLK -> VPSI SCK (Pin 25) CS -> VPSI SS (Pin 5) DC -> Pin 2 RST -> Pin 4 BL -> VCC

Can you help to confirm if you can connect ST7789 to TCall SIM800?

image

Thanks for your help.

LilyGO commented 3 years ago

Hello. You need to modify the pins.You need to look at the schematic which pins are not being used.For example, 26 pins have been used