Peerajak Witoonchart asked 3 years ago
https://randomnerdtutorials.com/esp32-esp8266-i2c-lcd-arduino-ide/
Hi I follow the above tutorial to do hello world I2C LCD
I am using ESP32 WROOM32
I managed to show i2c address 0x27 on the serial monitor.
However, when I ran the code, only black light showed up, and nothing else.
the following was shown in serial monitor.
rst:0x1 (POWERON_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
configsip: 0, SPIWP:0xee
clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
mode:DIO, clock div:1
load:0x3fff0018,len:4
load:0x3fff001c,len:1216
ho 0 tail 12 room 4
load:0x40078000,len:9720
ho 0 tail 12 room 4
load:0x40080400,len:6352
entry 0x400806b8
What is the possible cause?
Peerajak Witoonchart answered 3 years ago
solved. Just use 5V to power LCD, and the Hello World is shown.
It was because3.3V to power LCD , Hello World was shown too but was too faint.
Sara Santos Staff answered 3 years ago
Hi.
I’m glad the problem is solved.
I’ll mark this issue as resolved.
If you need further help, you just need to open a new question in our forum.
Regards,
Sara