Here is the solution I finally use:
Code: Select all
byte rowPins[ROWS] = {25, 39, 34, 35};
byte colPins[COLS] = {33, 26, 32};
Francis
Search found 4 matches
- Thu Jan 14, 2021 9:54 am
- Forum: Hardware
- Topic: sensor_vn used as GPIO39 input
- Replies: 2
- Views: 2510
Re: sensor_vn used as GPIO39 input
Thank you very much!
Here is the solution I finally use:
Cheers,
Francis
Here is the solution I finally use:
Francis
- Wed Jan 13, 2021 4:21 pm
- Forum: Hardware
- Topic: sensor_vn used as GPIO39 input
- Replies: 2
- Views: 2510
sensor_vn used as GPIO39 input
Hello, I am trying to connect a 3x4 keyboard using Keypad.h library example. I wish to use GPIO 26, 25, 33, 32, 35, 34, 39 as input. I put 10k pull-up resistors for GPIO 35, 34 and 39. I have to use code as follow: byte rowPins[ROWS] = {R1, R2, R3, R4}; byte colPins[COLS] = {C1, C2, C3}; Case 1 work...
- Tue Jan 12, 2021 2:38 pm
- Forum: Hardware
- Topic: esp32, use HSPI pins for ST7735
- Replies: 1
- Views: 2604
Re: esp32, use HSPI pins for ST7735
I changed ESP32 board and used shorter wires. Then the problem got solved!
- Mon Jan 11, 2021 2:17 pm
- Forum: Hardware
- Topic: esp32, use HSPI pins for ST7735
- Replies: 1
- Views: 2604
esp32, use HSPI pins for ST7735
Hello everyone! I am trying to connect my ST7735 to my esp32 devkit v1 via HSPI pins. Unfortunatly, I can't make it work. My code: #include <Adafruit_GFX.h> #include <Adafruit_ST7735.h> #include <SPI.h> #define TFT_CS 15 #define TFT_DC 2 #define TFT_RST 4 #define TFT_MOSI 13 #define TFT_SCLK 14 #def...