My small tft monitor is disturbed by the loose Type-C cable, causing snowflakes that cannot be eliminated

[jason7766]

hi all;

I've tried re-uploading the code and pressing the rest key, but neither can get rid of the snowflakes,thanks for you help.

[theeccentricgenius]

Does your code fill the screen with black to start with?

I can only recommend redoing the TFT display jumper wires ohterwise.

[david_2018]

Are you certain you are using the correct library for that display?

The soldering on the header pins looks questionable.

[jason7766]

#include <Arduino.h>
#include <TFT_eSPI.h>
#include "I2Cdev.h"
#include "MPU6050.h"
#include "Wire.h"

#define WIDTH  128
#define HEIGHT 160

int16_t ax, ay, az;
int16_t gx, gy, gz;

MPU6050 accelgyro;
TFT_eSPI tft = TFT_eSPI();
TFT_eSprite spr = TFT_eSprite(&tft); 


void setup() {
  Serial.begin(115200);
  Wire.begin();

  accelgyro.setXGyroOffset(220);
  accelgyro.setYGyroOffset(76);
  accelgyro.setZGyroOffset(-85);

  spr.createSprite(WIDTH, HEIGHT); 
  tft.init();
  tft.setRotation(1);
  spr.fillScreen(TFT_BLACK);
  spr.setTextFont(2);
  spr.setTextSize(1);
  spr.setTextColor(TFT_GREEN);
  
  accelgyro.initialize();
  accelgyro.testConnection();
  
  if (accelgyro.testConnection())
   {
    Serial.println("MPU6050 connection successful");}
    
    else
    {Serial1.println("MPU6050 connection failed");}
  

}
  
  
void loop() {

  // accelgyro.getMotion6(&ax, &ay, &az, &gx, &gy, &gz);
  accelgyro.getAcceleration(&ax, &ay, &az);
  accelgyro.getRotation(&gx, &gy, &gz);
  
  spr.fillScreen(TFT_BLACK);
  spr.setCursor(0, 0);
  
  
  spr.drawString("X:" +String(ax), 0, 0);
  spr.drawString("Y:" +String(ay), 0, 40);
  spr.drawString("Z:" +String(az), 0, 80);
  spr.drawString("GX:" +String(gx), 70, 0);
  spr.drawString("GY:" +String(gy), 70, 40);
  spr.drawString("GZ:" +String(gz), 70, 80);


  spr.pushSprite(0,0);
  
  delay(1000);
  
}

There was no problem when I uploaded the code, but snowflakes appeared on the Type-C cable after shaking for a while. I also reconnected the jumper, but it didn't seem to work, but thank you for your suggestion.

[david_2018]

@jason7766

snowflakes appeared on the Type-C cable after shaking for a while

Do you have another cable that makes a more solid connection?

Alternatively, power the board using a mechanically secure connection from a power supply.

[theeccentricgenius]

Does it work if you disconnect the power then reconnect?

[jason7766]

TFT_eSPI

I am using this library, but the problem is not with the soldering. I heard the computer prompt that the Type-C cable shook a little, and snowflakes appeared.

[theeccentricgenius]

What happens when you unplug the Type-C cable then plug it back in?

[jason7766]

Re-inserting the Type-C cable did not solve it, but I used the code tft.setRotation(1); to rotate to parameter 3, and then rotated back to parameter 1, which solved most of the snowflakes, thank you for your help.