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Questions tagged [blynk]

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38 views

Adding WiFi to my Arduino Keypad Lock

I'm a really passionate beginner with arduino and electronics and I've built a Keypad lock for my room's door (inside the house). I've used an arduino that activates a motor using a transistor to ...
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0answers
67 views

Blynk.Begin(auth, ssid, pass) causing watchdog reset

I am trying to follow this tutorial and I keep hitting a problem repeatedly. I checked in my code that every time it hits the line Blynk.begin(auth, ssid, pass);, the serial monitor shows me that ...
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1answer
31 views

Esp and blynk app

It is possible to control one relay using Blynk app and also using an atmega? To a better understanding think at a relay that will turn on a fan when you use the blynk app. but when you don;t have the ...
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376 views

Using 2 serial ports on NodeMCU

I am using a NodeMCU ESP 12E board which will be programmed using the Arduino IDE. I intend to use it to send GPS data to the Blynk app server. I also want to interface a Bluetooth module HC-05 to the ...
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0answers
131 views

Arduino Pro mini does not wake up after a few interrupts from DS3231

I hope someone can help me. I'm building a GSM water level meter that runs on solar power, using an Arduino pro mini, DS3231 RTC, JSN-SR04T - ULTRASONIC SENSOR, SIM800L along with a DFrobot DFR0535 ...
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0answers
71 views

Device is not online yet while trying to connect Arduino uno (with USB) to Blynk App

I am trying to run my Arduino Uno using Blynk app. I have Arduino IDE , Blynk library on the same folder within the Arduino library folder, changed the AuthCode using the one provided , checked all ...
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1answer
79 views

Management issues through Blynk

I wrote a sketch for controlling the stepper motor under the controls of the Blynk application, the sketch was compiled but there was a problem in that no control was taking place. Receipts and ...
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0answers
112 views

Problem in the library blynk

there was a problem loading the sketch, writing that the BlynkSimpleSerial.h library is missing. I tried to find on the Internet I did not tell me how to fix this error. #include <SoftwareSerial....
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1answer
439 views

Combining two code of two sensor in one program

I'm using two sensors, which is Galvanic Skin Response sensor and Heartrate sensor. The problem is that when I combined both of the codes, the only output that is showing up is from Heartrate only ...
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1answer
301 views

ESP8266 too many argument to function

My project uses ESP8226 to allow: 1) user to set an alarm. 2) after 20 sec of the alarm ringing, it will notify to phone via blynk app using motion sensor. 3) after 40 sec it will turn off ...
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1answer
142 views

Blynk app, DotStar bluetooth control code help

This is my setup: Arduino Mega; HM-10 bluetooth module (bought off ebay, so not sure if genuine but works); Adafruit Dotstar addressable LED strip; iOS Blynk app; Hardware-wise, everything is ...
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1answer
93 views

Changing outputs infinitely for no reason

Im a student and working on a arduino project for IoT competition and me and my team have built a house and I made this code below. For some reason when I upload it to my Arduino MKR1000 it constantly ...
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1answer
287 views

Notifications in constant loop (Blynk) trying to trigger along with serial function

This is an extension from a previous thread that was getting lengthy and off the original topic. I have the following code which monitors the state of a float switch (high or low). I upload the sketch,...
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3answers
643 views

How to use the HC-05 properly?

It all started when I was working on my Arduino project, which involves an Arduino Nano, an HC05 module and a bunch of sensors (DHT 11, soil moisture and LDR) with Blynk App. Everything worked as it ...
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1answer
950 views

Update button state in Blynk app through the code

I'm using Blynk along with a WeMos D1 R2 and i can change modes through an ON/OFF button. I can succesfully change mode and make my application go from mode 1 (irrigation) to mode 2 (Fertilization), ...
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1answer
110 views

Problem with action that should happen in loop(continuously)

I’m using WeMos D1 R2 and latest Blynk library and app. I am also using Arduino IDE 1.6.13. I am trying to read a button from the app, which works fine, but i want to read it continuously. Through the ...