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This way we just see how to read digital signal using ESp8266.

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So for that purpose we just go to Developer Zone create new template.

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In this I just name it Digital read.

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So I am using ESP 8266 connection type.

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Wi-Fi.

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Just click on done.

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Now you just create a data stream for this new data stream.

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My data stream should be virtual pin.

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So just I'm over here.

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I'm using the zero pin.

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So just name it.

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Let's say d one or D zero.

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D0D8.

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So right now d zero is there.

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I just connect d zero with plus five volt or plus three volt and ground volt and ground.

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So that I just acquire when it is connected with three volt we just get I mean we just connect it with

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ground.

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We just acquire zero or low signal.

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Okay.

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So now I just go to the web dashboard over here.

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I just drag the input state or LED.

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So I just drag this LED over here.

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You just increase the size.

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So right now this is the LED.

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Just click over here.

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You just select the data stream.

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The color may be red.

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You just select save it.

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Now you just check the output of the V0 pin over this d0 led.

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Okay.

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Now just go to device before this.

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You just need to save it.

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Also right now as you see I forgot to save it.

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So again I need to create new data stream virtual pin.

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So this is my D zero.

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308.

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Now web dashboard go to the LEDs.

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Let's drag over here.

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is the size.

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We just change the color.

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Also, I am just putting red over here.

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Save it.

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Save it from here.

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Now it is saved.

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So go to the device.

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Create new device from template.

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You just select the template name.

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Create.

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Right now this is my authentication ID.

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Template ID and template name.

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So just copy this.

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Go to the code over here.

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You just paste it.

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So this is the same.

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My wifi ID password is same.

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So over here there is a little bit difference in the code.

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Void setup Serial.begin.

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It is the baud rate.

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Blink dot begin.

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You have to call pin mode.

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I'm using pin number 16.

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That is d0 pin European.

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According to the diagram, then in the void loop you just blink, run it, then we have a variable signal

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state.

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We just use digital read from pin number 16 and we just write it over the blink virtual write v0.

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Okay.

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So we just use v0 and over v0.

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We just put the signal state and at a one millisecond delay okay.

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So you just need to write this code for me.

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Selected ports board is selected.

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Just run it.

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So it will take some time.

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So now code is compiling.

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So now it is writing in the ESP controller.

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70% 30% 38%.

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Hardly.

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Take one minute and writing the code.

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So now.

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Code is successfully burned in the ESP 266.

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Now we require signal.

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So we just go to the hardware part.

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Part.

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As you see right now I just connect D zero pin.

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So this is my D D0 pin over here.

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This is my d0.

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Now I just connect.

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Three volt signal to my D0 pin.

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Okay so right now I already just reset it.

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So let's check what happened on the dashboard.

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Go to the device.

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Go to the device over here.

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Device is online.

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Digital read.

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As you see color is red.

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Let's check what happened when I just connect.

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In place of three volt.

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So I just remove this and connect Ground signal over here.

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So what happened now?

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Signal is off.

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So when I just connect this three volt signal over here, my signal is high after some delay.

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As you see, signal is red.

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So now we just see the signal over the mobile phone also.

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So as you see over here this is my digital read.

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You just configure it add a signal right now.

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Add EV require a LED.

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So go to the LED.

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So this is my LED over here.

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You just need to select the data stream.

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My data stream is D0.

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Back.

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Back.

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So right now let's check.

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Right now it is connected with three volt.

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So it is its color is blue.

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Let's check what happened when I just connect the ground over here.

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As you see it is off.

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It is in off condition.

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It is up to you how you show the off condition, how you show the on condition.

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Let's change the color of LED.

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So I just go to the device on the dashboard.

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I just added this.

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I want to change the color to let's say orange okay.

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So let's check what happened.

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Save.

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Again go to the device Digital read.

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So right now it is in off condition when I just connect it with three volt.

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So now it is glowing or it is in high state.

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So this is how you can read digital signal using ESP 82366.

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You can connect any sensor that generate digital signal using this code.

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Also like if you want to interface IR sensor, if you want to interface LDR.

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If you want to interface Pir sensor, you just use this code only.

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So using this code you can read any digital signal using ESP 8266.

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Thank you.