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Questions tagged [blynk]

IoT platform to connect your devices to the cloud, design apps to control them, and manage your deployed products at scale.

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Software Serial Communication Problem between ESP8266 and Arduino Mega for Plant Monitoring System (using Blynk IoT)

We're using the ESP8266 to receive data from the Arduino Megaboard where our sensors are connected. Supposedly, our ESP is connected to the Blynk App. However, the values showing up in our dashboard ...
Earth_Lovers's user avatar
2 votes
0 answers
65 views

My esp01 code keeps on erasing after reboot

I am uploading a simple Blynk cloud example code to control a led on GPIO2 of my esp01 board. #define BLYNK_TEMPLATE_ID "" #define BLYNK_DEVICE_NAME "" #define ...
Naman Kansal's user avatar
2 votes
0 answers
427 views

MAX30102 doesnt show data when it's interfacing with other sensors MLX90614 and MPU6050

The hardware I am using is ESP32 with MAX30102, MLX90614 and MPU6050 sensors and Using Blynk to show my data from the sensors. The issue I am facing is when I ran the code with all three sensors only ...
LLAMAFTW's user avatar
1 vote
2 answers
704 views

NodeMCU wont connect to Blynk

My NodeMCU wont connect to Blynk with my code but works fine with example code and same auth token and WiFi info. Cant figure out why its not working. Must be something in my code interfering with it (...
Randomaker's user avatar
2 votes
1 answer
257 views

How to attempt connection to WiFi only once?

I am working on a garden timer project, I connect to WiFi once and if its successful show time from NTPClient or else show time from RTC. I have been done the above, and it works in the sense that if ...
Coder9390's user avatar
  • 472
1 vote
1 answer
122 views

Node MCU not functioning correctly

i have a node mcu and i uploaded one example code to test it for rf signal decoding it worked. so after that i have written a code based on that and when i uploaded the code my node MCU suddenly isn't ...
rohithrathod banoth's user avatar
1 vote
1 answer
952 views

How to use millis instead of delay? [duplicate]

Sorry if something similar has been answered before... I am working on a garden timer project that runs on a ESP8266 based NodeMCU and is integrated with Blynk. I have a waterNow function that ...
Coder9390's user avatar
  • 472
0 votes
1 answer
3k views

Blynk, but continue program if Blynk connection fails

I'm having an issue with Blynk.begin(auth, ssid, pass); The problem is, when it fails to connect to the wifi, the rest of the program does not continue. I'm using a Wemos D1 and it is also controlling ...
Petrus's user avatar
  • 103
1 vote
0 answers
240 views

Need help - skipping over some serial.print statements

I have a project I'm working on for a chicken coop. I want to control the door with timing of the sunrise and sunset. Also looking to a few other things but somewhere along the way, I must have ...
Shane Petschonek's user avatar
1 vote
0 answers
390 views

Maximum baud rate for sending a byte of data via SoftwareSerial from master Arduino UNO to slave Arduino UNO

I am trying to read data from a Blynk widget via ESP8266 and Arduino UNO and trying to send it to another slave Arduino UNO. But, the problem is the data is taking some time to reach to the slave ...
coder-ari's user avatar
1 vote
1 answer
381 views

How to override automatic control in Blynk app?

I am a beginner to Blynk, and have successfully built a simple water temperature control project. It consists of an ESP32, a plug-in water heater, and an AC relay board. The ESP32 controls the relay ...
user3211857's user avatar
1 vote
0 answers
53 views

Arduino wait for incomming data from blynk terminal [duplicate]

I need to add wait command in code where it waits the next input value from blynk terminal to arduino? How can I do that? please help, I will appreciate your help, Thank you. Here is my code ...
Time Gold's user avatar
  • 103
1 vote
0 answers
622 views

Read from Blynk terminal number to arduino

I have a problem in sending numbers from blynk terminal to arduino serial monitor. When I send any number from blynk terminal the arduino always getting 1. How can I get any number please help me. ...
Time Gold's user avatar
  • 103
1 vote
1 answer
313 views

How I can send data information without work WiFi to LCD?

Hi everyone I am beginning learn coding and the second language English. I have small project I use Arduino uno , esp8266 , dht11 , lcd I2C and use blynk app in my project I have the code and work ...
AbuWeSaM's user avatar
1 vote
0 answers
729 views

Esp32(Arduino Core) + Blynk Wifi Connection Problems

So I am making a football playing robot which consists of 3 servo motors. Currently,i am only checking only a single servo(myservoKicker)which is operated via button in the blynk app and trying to ...
Informal Limits Lad's user avatar
0 votes
1 answer
126 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 ...
MLpranav's user avatar
1 vote
0 answers
2k 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 ...
zac5482's user avatar
  • 67
0 votes
1 answer
78 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 ...
Iulian Chirvasa's user avatar
2 votes
0 answers
2k 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 ...
maheshmt's user avatar
1 vote
0 answers
419 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, a DS3231 RTC, a JSN-SR04T - ULTRASONIC SENSOR, and a SIM800L along with a DFrobot ...
Roelof Loots's user avatar
0 votes
1 answer
322 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 ...
Maks Yarkovoy's user avatar
0 votes
1 answer
969 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 ...
tako's user avatar
  • 3
0 votes
1 answer
2k 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 ...
Wady's user avatar
  • 1
1 vote
1 answer
247 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 ...
turty_k's user avatar
  • 19
0 votes
1 answer
154 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 ...
mike6715b's user avatar
  • 103
0 votes
1 answer
838 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,...
gfuller40's user avatar
  • 107
0 votes
3 answers
2k 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 ...
Sagnik Pradhan's user avatar
1 vote
1 answer
4k 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), ...
Galinho Salonica's user avatar
0 votes
1 answer
605 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 ...
Galinho Salonica's user avatar