Dear Ladies and Gentlemen,
I'd like to let a LED blink base on the time of the day. So I took Wemos D1 mini and a WS2818B shield and a RTC DS107 Shield for the before mentioned ESP8266 model.
Based on my observation, I can let the LED blink on its own without starting the initialization of the RTC. As soon as I initialize the communication with the DS1307 shield, the LED shield won't translate any commands toward the desired behavior (e.g. the LED won't blink anymore).
What am I doing wrong?
I'm using the Ardunio IDE to program the D1 mini.
I stacked the shields and kept an eye on the pins to be sure I did wire everything the right way.
Libraries in use:
RTC: https://github.com/Makuna/Rtc
LED: Adafruit NeoPixel
Code:
// WIFI
#include <ESP8266WiFi.h>
// RTC
#include <RtcDateTime.h>
#include <RtcUtility.h>
#include <Wire.h> // must be included here so that Arduino library object file references work
#include <RtcDS1307.h>
RtcDS1307<TwoWire> Rtc(Wire);
// LED
#include <Adafruit_NeoPixel.h>
#define PIN D2
#define NUMPIXELS 1
Adafruit_NeoPixel pixels(NUMPIXELS, PIN, NEO_GRB + NEO_KHZ400);
int DELAYVAL = 1000; // Time (in milliseconds) to pause between pixels
void setup() {
Serial.begin(57600);
Serial.println();
Serial.flush();
setupLed();
setupWifiConnection();
setupRtc();
}
void loop() {
pixels.clear(); // Set all pixel colors to 'off'
pixels.show(); // Send the updated pixel colors to the hardware.
delay(DELAYVAL); // Pause before next pass through loop
pixels.setPixelColor(0, pixels.Color(0, 150, 0));
pixels.show(); // Send the updated pixel colors to the hardware.
delay(DELAYVAL); // Pause before next pass
}
void setupRtc () {
Rtc.Begin();
RtcDateTime compiled = RtcDateTime(__DATE__, __TIME__);
Serial.println();
if (!Rtc.IsDateTimeValid())
{
if (Rtc.LastError() != 0)
{
// we have a communications error
// see https://www.arduino.cc/en/Reference/WireEndTransmission for
// what the number means
Serial.print("RTC communications error = ");
Serial.println(Rtc.LastError());
}
else
{
// Common Causes:
// 1) first time you ran and the device wasn't running yet
// 2) the battery on the device is low or even missing
Serial.println("RTC lost confidence in the DateTime!");
// following line sets the RTC to the date & time this sketch was compiled
// it will also reset the valid flag internally unless the Rtc device is
// having an issue
Rtc.SetDateTime(compiled);
}
}
if (!Rtc.GetIsRunning())
{
Serial.println("RTC was not actively running, starting now");
Rtc.SetIsRunning(true);
}
RtcDateTime now = Rtc.GetDateTime();
if (now < compiled)
{
Serial.println("RTC is older than compile time! (Updating DateTime)");
Rtc.SetDateTime(compiled);
}
else if (now > compiled)
{
Serial.println("RTC is newer than compile time. (this is expected)");
}
else if (now == compiled)
{
Serial.println("RTC is the same as compile time! (not expected but all is fine)");
}
// never assume the Rtc was last configured by you, so
// just clear them to your needed state
Rtc.SetSquareWavePin(DS1307SquareWaveOut_Low);
}
void setupLed () {
pixels.begin();
pixels.clear();
pixels.show();
}
void setupWifiConnection () {
WiFi.begin("some ap", "some password");
Serial.print("Connecting");
while (WiFi.status() != WL_CONNECTED)
{
delay(500);
Serial.print(".");
}
Serial.println();
Serial.print("Connected, IP address: ");
Serial.println(WiFi.localIP());
}
