Heltec Wireless Stick and OLED

[kriistobal]

Hi, I recently bought the heltec wireless stick board that has a 0.49 "oled screen, using a very basic example from the heltec library to display text on the screen it works

#include "heltec.h"
void setup() {
  Heltec.begin(true, false, false); // Display, LoRa, Serial
  Heltec.display->clear();
}
void loop() {
  Heltec.display->drawString(0, 0, "Hello world"); 
  Heltec.display->display();
}

but my problem is that I don't want to use the heltec library (which includes the configuration for the display, LoRa and serial port), but if I need something I add it on my own. This is the code I made for the basic example, but it doesn't show anything on the display

#include <Wire.h>
#include "SSD1306Wire.h"

SSD1306Wire display(0x3c, 4, 15, GEOMETRY_64_32);

void setup() {
  display.init();
  display.flipScreenVertically();
  display.clear();
}
void loop() {
  display.drawString(0, 0, "Hello world");
  display.display();
}

[chrisknightley]

@kriistobal

heltec wireless stick board

This module uses RST signals as well as SDA and SCL for I2C OLED.
Probably requires operate RST pin of OLED.
Please use library corresponding to it.

[kriistobal]

@chrisknightley

Probably requires operate RST pin of OLED.

Thanks for your answer. I solved the problem by adding a reset to the pin of the OLED screen in the setup code.

pinMode(16, OUTPUT);
digitalWrite(16, LOW);
delay(50);
digitalWrite(16, HIGH);