Why can't I get HIGH on digital output?

I want 2 LEDs to blink every second with my D21G, but it didn't work so I used lcd to see what's going on and it's always 

HIGH Dig: 00

LOW Dig:00

#include <Wire.h>
#include <UC1701.h>
#include <Indio.h>

static UC1701 lcd;

void setup() {
 
  Indio.digitalMode(1, OUTPUT); // Set CH1 as an output
  Indio.digitalMode(2, OUTPUT); // Set CH2 as an output
  Indio.digitalWrite(1, LOW); 
  Indio.digitalWrite(2, LOW);
  lcd.begin();  //set the resolution of the LCD screen

  for (int y = 0; y <= 7; y++) {
    for (int x = 0; x <= 128; x++) {
      lcd.setCursor(x, y);
      lcd.print(" ");
    }
  }
}

void loop() {
 
  lcd.clear(); //clear the screen
  lcd.setCursor(0, 2);
  lcd.print("HIGH Dig: ");
  Indio.digitalWrite(1, HIGH);
  Indio.digitalWrite(2, HIGH);
  lcd.print(Indio.digitalRead(1), BIN);
  lcd.print(Indio.digitalRead(2), BIN);
  delay(1000);
  lcd.clear(); //clear the screen
  lcd.setCursor(0, 2);
  lcd.print("LOW Dig: ");
  Indio.digitalWrite(1, LOW);
  Indio.digitalWrite(2, LOW);
  lcd.print(Indio.digitalRead(1), BIN);
  lcd.print(Indio.digitalRead(2), BIN);
  delay(1000);
  
}

Nikola
Nikola
4
| 0 0 0
Asked on 5/4/18, 9:40 PM
0
vote
77 Views

Hi Nikola,

Can you confirm that you are powering the INDIO with external 12/24V, as the I/O will not work on USB power only.

If you already had the external power connected, then i suggest you include a digitalMode(x, INPUT) before you do the digitalRead() and/or a digitalMode(x, OUTPUT) before digitalWrite(). I'm not sure if you can Read when the channel is defined as output and vice versa Write on input. Let us know if you need more help on this.

Tom
Tom
5210
| 0 0 1
Answered on 5/5/18, 1:40 AM
0
vote

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Asked: 5/4/18, 9:40 PM
Seen: 77 times
Last updated: 5/5/18, 1:40 AM