arduino_code_errors
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Arduino code errors
long
Make sure long is the first item after the = like in
varA = ((long) varB * varC * varD)/ varE;
Display issues with I2C displays
When the text is not displayed correct check
- The 5V powersupply
- The two 10k pullupresistors on SCL and SDA to +5V
- The adress of the display. It should look like: LiquidCrystal_I2C lcd(0x3F, 20, 4); where 0x3F is the I2C address of the display
- Test with an other Arduinoboard and display
- Check LiquidCrystal_I2C.cpp . It should contain, if you are using the LCD_I2C library,:
#define printIIC(args) Wire.write(args) inline size_t LiquidCrystal_I2C::write(uint8_t value) { send(value, Rs); //return 0; return 1; }
Serial.print()
When Serial.print does not show the number represented by the variable, or shows a rectangle, use
Serial.print(somevariable, DEC);
Also BIN, HEX and OCT can be used
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arduino_code_errors.txt · Last modified: 27-05-2020 16:15 by wim