Read an input from Arduino Moderators: adafruit_support_bill, adafruit

[Arduinobrenn]

Hi
I'm also struggling to do the following: I want to be able to send a High signal (3.3v) from an Arduino to the ESP8266 ESP-12E, and for the ESP8266 ESP-12E to publish it.
I can get the read a Low signal from ground as follows,

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pinMode(SENSOR1, INPUT_PULLUP);

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      current1 = digitalRead(SENSOR1);

  // return if the value hasn't changed
  if(current1 == last1)
    return;

  int32_t value1 = (current1 == LOW ? 1 : 0);

  // Now we can publish stuff!
  Serial.print(F("\nSending sensor1 value: "));
  Serial.print(value1);
  Serial.print("... ");

  if (! sensor1.publish(value1))
    Serial.println(F("Failed."));
  else
    Serial.println(F("Success!"));

  // save the button state
  last1 = current1;

How can I read a signal from my arduino?

[franklin97355]

How is the Arduino connected to the ESP8266? On what pin?

[Arduinobrenn]

It's not actually connected yet, I am just wanting to use one of the digital pins on the arduino as an output.
I was thinking I can pass it through a logical level shifter to drop from 5v to 3.3v.
Then set the pin as output high, when the alarm on the Arduino is triggered, to then switch to low.
Many thanks.

[franklin97355]

That will work.

[Arduinobrenn]

Just one last question, do I need to edit the code from:- pinMode(SENSOR1, INPUT_PULLUP);
To just:- pinMode(SENSOR1, INPUT); ?

Do I need any pullup resistors or just straight in?

Thanks

[Arduinobrenn]

SOLVED:

I have changed it to pinmode, Input and it works a treat.

Thanks for your help.

Now all I need is to find out how to read more than one button :(