Qwiic Real Time Clock Module not working when changing I2C pinout

Asked Aug 12 '19 at 09:01

Active Aug 12 '19 at 09:01

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I am trying to get the Qwiic Real Time Clock Module by Sparkfun working. I am using an esp8266. The clock works fine with the standard I2C pinouts, but when I change it with Wire.begin(2, 3);, it suddenly doesn't work anymore.

I've tried changing the pinouts to other examples (Wire.begin(0, 1); etc.) but nothing semes to work. I checked the wiring a ton of times and I think it is correct.

As code, I am just using a modified example written by Sparkfun.

This is my code:

void setup() {
  Wire.begin(2 , 3);

  Serial.begin(9600);
  Serial.println("Read Time from RTC Example");

  while(1) {
    if (rtc.begin() == false) {
      Serial.println("Something went wrong, check wiring");
    } else
      break;
    delay(1000);
  }

  if (rtc.setToCompilerTime() == false) {
    Serial.println("Something went wrong setting the time");
  }

  Serial.println("RTC online!");
}

void loop() { }

When i run the Program, it just stays in the while loop and never progresses further.

asked Aug 12 '19 at 09:01

ILikeSahne

pins 0 and 3 are Serial – Juraj Aug 12 '19 at 09:13
I know, but I rly need to use them, as no other pins are free to use. – ILikeSahne Aug 12 '19 at 09:14
then don't do Serial.begin() – Juraj Aug 12 '19 at 09:18
i also need to use Serial connection for a E-Paper Display – ILikeSahne Aug 12 '19 at 09:18
I have 3 empty pins left: 1, 2 and 3 – ILikeSahne Aug 12 '19 at 09:19
correction: 1 and 3 are Serial. – Juraj Aug 12 '19 at 09:19
you don't have 1 and 3 if you use Serial – Juraj Aug 12 '19 at 09:20
what esp8266 board is it? – Juraj Aug 12 '19 at 09:20
Universal e-Paper raw Panel Driver Board, ESP8266 WiFi Wireless – ILikeSahne Aug 12 '19 at 09:22
what occupies io 4 and 5? – Juraj Aug 12 '19 at 09:28
Thank you for your help, D4 isn't free but D5 is and it works with `Wire.begin(14, 2);` – ILikeSahne Aug 12 '19 at 09:31
14 is used for SPI for the e-paper – Juraj Aug 12 '19 at 09:35
io 4 and 5 are labeled D1 D2. this are default Wire pins for esp9266. how do you use them? – Juraj Aug 12 '19 at 09:37
I have a ink-Display connected. It uses the pins: 4, 5, 15, 16 – ILikeSahne Aug 12 '19 at 10:12
The red pinnouts are the ones my programm uses: https://imgur.com/a/XQQLV3W, so if spi uses 12, 13, 14 and 15 and serial uses 1 and 3, i would only have pin 2 left. Is this correct? – ILikeSahne Aug 12 '19 at 10:18
the 4, 5, and 16 are additional connections of the SPI display? 15 is CS. how are 4, 5 and 16 used? – Juraj Aug 12 '19 at 10:44
I don't really understand what you mean. 4, 5 and 16 are used by the display. – ILikeSahne Aug 12 '19 at 10:46
Ok i figered out a way to save the 0 pin. Now it works – ILikeSahne Aug 12 '19 at 12:29

Qwiic Real Time Clock Module not working when changing I2C pinout

0 Answers0