I'm having weird characters on my LCD Display that I wanted to use for debugging LDR Values. Here's what it looks like in Serial Monitor:
[left]ldr_value [0-???]:
110
ldr_adjusted [0-1023]:
321
ldr:
40
light_level:
15[/left]
Here's a picture of what it looks like on the LCD:
And this is the code I'm using:
#include <FastLED.h>
#include <RCSwitch.h>
// Adafruits RTClib from https://github.com/adafruit/RTClib
#include <Wire.h>
#include "RTClib.h"
#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x3F, 16, 2);
RTC_DS3231 RTC;
RCSwitch mySwitch = RCSwitch(); // send wireless Data
String inString = "";
DateTime now;
char daysOfTheWeek[7][12] = {"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"};
#define NUM_LEDS 60
#define LED_TYPE WS2812B
#define DATA_PIN 6
#define COLOR_ORDER GRB
CRGB leds[NUM_LEDS];
// Filter averaging factor - higher value means more sluggish response to changes in ambient brightness
#define FILTER_LEN 8
// Brightness level initial value
int level=15;
// Brightness correction for Leds
unsigned char bright[] = {0, 2, 4, 7, 11, 18, 30, 40, 50, 65, 80, 96, 125, 160, 200, 255};
void setup()
{
mySwitch.enableTransmit(10); // Der Sender wird an Pin 10 angeschlossen
// init RTClib
Wire.begin();
RTC.begin();
// Following line sets the RTC to the date & time this sketch was compiled
// every time I upload to the arduino, it resets this time. After initial
// setup, this line needs to be removed.
//RTC.adjust(DateTime(__DATE__, __TIME__)); last: 8:24
// LCD Display
lcd.init(); //Im Setup wird der LCD gestartet
lcd.backlight();
// Setup FastLED Lib
FastLED.addLeds<LED_TYPE,DATA_PIN,COLOR_ORDER>(leds,NUM_LEDS).setCorrection(TypicalLEDStrip);
// setup measurement for LDR
digitalWrite(A0, HIGH); // set pullup on analog pin 0
pinMode(A1, OUTPUT);
digitalWrite(A1, LOW);
Serial.begin(57600); //was 57600
}
unsigned int ldr=0;
void doLDR() {
unsigned int ldr_value = analogRead(0); //reads the LDR values
//Adjust for LDR variations.
//dark = 1023
//light = 0
//If your LDR for example reaches a max analogRead value of 350 instead of 1023 for 100% dark.
unsigned int ldr_adjusted=map(ldr_value,0,350,0,1023); //was map(ldr_value,0,700,0,1023);
//the level for the original LDR by Freenove
// was 400
//set max limit (to avoid potential 'divide-by-zero's).
if (ldr_adjusted >= 1023) ldr_adjusted = 1023; //was 1023
//ldr follows ldr_adjusted, but is averaged so that values only change gradually
ldr = ((unsigned long)(FILTER_LEN-1)*ldr+ldr_adjusted)/FILTER_LEN;
unsigned int light_level=15; // was 15
//translate [0-1023] to [15-0]
//light_level = (1024-ldr)>>6;
light_level=map(ldr,0,1023,15,0);
if (light_level >= 15) light_level = 15; // was (light_level >= 15)
if (light_level <= 1) light_level = 1;
//DEBUG SPI
// /*
Serial.println("ldr_value [0-???]:");
Serial.println(ldr_value);
Serial.println("ldr_adjusted [0-1023]:");
Serial.println(ldr_adjusted);
Serial.println("ldr:");
Serial.println(ldr);
Serial.println("light_level:");
Serial.println(light_level);
// */
//DEBUG LCD-LDR BEGINN
lcd.setCursor(0, 0);
lcd.print(ldr_value);
lcd.println(" ");
lcd.println(ldr_adjusted);
// lcd.println("LDR:");
// lcd.println(ldr);
// lcd.println(" ");
// lcd.println(light_level);
//DEBUG LCD-LDR END
//level=2;
level = light_level;
}
DateTime old;
void loop() {
// get time
DateTime now = RTC.now();
/* // Begin LCD Time
lcd.setCursor(0, 1);
lcd.print(now.hour());
lcd.print(":");
lcd.print(now.minute());
lcd.print(" ");
// lcd.print(now.second());
lcd.print(now.day());
lcd.print('.');
lcd.print(now.month());
lcd.print('.');
lcd.print(now.year());
// lcd.print(" Uhr");
// END LCD
*/
// send serial Data
if (mySwitch.available()) {
int value = mySwitch.getReceivedValue();
if (value == 0) {
Serial.println("Unknown encoding");
} else {
Serial.println( mySwitch.getReceivedValue() );
}
mySwitch.resetAvailable();
}
// Read serial input:
while (Serial.available() > 0) {
int inChar = Serial.read();
if (isDigit(inChar)) {
inString += (char)inChar;
}
if (inChar == '#') {
long code = inString.toInt();
mySwitch.send(code, 24);
Serial.println(code);
inString = "";
}
}
// send serial Data
// DEBUG RTC
/*
Serial.print(now.year(), DEC);
Serial.print('/');
Serial.print(now.month(), DEC);
Serial.print('/');
Serial.print(now.day(), DEC);
Serial.print(' ');
Serial.print(now.hour(), DEC);
Serial.print(':');
Serial.print(now.minute(), DEC);
Serial.print(':');
Serial.print(now.second(), DEC);
Serial.println();
*/
if (now.second()!=old.second()) {
old = now;
doLDR();
}
// clear LED array
memset(leds, 0, NUM_LEDS * 3);
if(level == 1){
// this is the night mode
// set LED background
for (int i=0; i<NUM_LEDS; i++) {
leds[i].r = bright[level];
leds[i].g = (bright[level]+1)/2;
leds[i].b = 0;
}
...
leds[((59+hourpos)%60)%60].g = bright[level/2];
leds[(hourpos)%60].g = bright[level];
leds[((hourpos+1))%60].g = bright[level/2];
}
// update LEDs
//FastLED.setBrightness(100);
FastLED.show();
FastLED.delay(500);
// wait some time
//delay(500);
}
How can they be removed? I can't fit everything on the display, these are stealing my lcd real estate
The connection to this thread is that the symptoms are "Wierd characters appearing on the LCD" whenever it goes into transmit.