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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.

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

30 questions
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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 Mega board, where our sensors are connected. Supposedly, our ESP is connected to the Blynk App. However, the values showing up in our dashboard are 0 but, the app says that the device is…
Earth_Lovers
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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 BLYNK_FIRMWARE_VERSION "0.1.0" #define BLYNK_PRINT Serial //#define…
Naman Kansal
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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 the MAX30102 sensor doesn't show data. I tried…
LLAMAFTW
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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 I turn off the WiFi while the program is running,…
Coder9390
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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 board along with the GPS module. I am also…
maheshmt
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Can't sync ESP32 with Blynk

I was trying to display the readings of my dht11 sensor on the Blynk dashboard but I am struggling a lot. A little help would be really appreciated. #define BLYNK_PRINT Serial /* Fill in information from Blynk Device Info here */ #define…
KnightRiderDutt
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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 (Or something stupid I'm missing). Any ideas?…
Randomaker
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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 working as it should be. It is giving out some…
rohithrathod banoth
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How to use millis instead of delay?

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 activates when I press a button on the Blynk app, it…
Coder9390
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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 screwed up the placement of setup(), loop() and other…
Shane Petschonek
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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 Arduino for further processing and I need it to be…
coder-ari
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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 board, while the water heater is plugged into the…
user3211857
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Arduino wait for incomming data from blynk terminal

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 BLYNK_WRITE(V0) { String i = param.asStr();…
Time Gold
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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. Thank you. Here's my code BLYNK_WRITE(V0){ int…
Time Gold
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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 probably when WiFi ON but I have question How I can…
AbuWeSaM
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