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  • Introduction
  • Getting Started
    • Supported Hardware
    • Quickstart
      • Next Steps After Quickstart
      • Quickstart Device: Code Overview
      • Troubleshooting
    • Device Activation Methods
      • Manual Device Activation
      • WiFi provisioning
      • Static Token
    • Template Quick Setup
      • Set Up Datastreams
      • Set Up Web Dashboard
      • Set Up Mobile App Dashboard
      • Prepare Your Code
      • Test your Template
    • Send Data From Hardware To Blynk
    • Control Devices (GPIOs and beyond)
    • Events
    • Notifications (Alerts)
    • Sign Up / Sign In
  • General Concepts
    • Developer Mode
    • Device
    • Device Template
    • Connection Lifecycle
      • Disconnections And Heartbeat
    • Users
      • Multi-tenancy
    • Organizations
    • Automations
      • Forward Device Data
  • Message Usage
  • Integration Guides
    • Node-RED
    • The Things Stack
      • Getting Started
      • Device Grouping
      • Automated Device Onboarding
      • System DataStreams
    • Blues
    • NCD Industrial Vibration Sensor
    • Particle - monitor with Blynk
    • Particle - control with Blynk
    • AWS IoT Core
  • Myriota
  • OpenWeather
  • Blynk.Console
    • Overview
    • Dashboards
      • Dashboard Widgets
    • Devices
      • Device profile
        • Dashboard
        • Device Info & Metadata
        • Notifications & Events
        • Developer tools
          • General
          • Datastreams
          • Testing
          • Actions Log
      • Actions with devices
      • Segments
      • Filters
      • Notifications Settings
      • Device Sharing
    • Locations
      • Location Profile
      • Assigning Devices to the Locations
    • Organizations
      • Create a Sub-Organization
      • Working with Sub-Organizations
    • Users
      • User Profile
    • Device Templates
      • Working With Templates
      • Info
        • Offline Ignore Period
        • Manufacturer
        • Template ID
        • Categories
        • Hotspot Prefix
      • Datastreams
        • Datastream Settings
          • Name
          • Alias
          • Virtual Pin
          • Color
          • Data Type
          • Min Value
          • Max Value
          • Default Value
          • Save RAW Data
          • Invalidate Value
          • Wait for confirmation from device
          • Sync with latest server value every time device connects to the cloud
          • Expose to Voice Assistants
        • Virtual Pin
        • Location
        • Enumerable
      • Web Dashboard
        • Multiple Dashboard Tabs
      • Metadata
        • Metadata Tutorial
      • Connection Lifecycle
      • Events
        • Custom Events
          • Event Settings
          • How to Send/Log Events
          • Content Events
        • Notifications Settings
          • Custom Sounds and Critical Notifications
      • User Guides
      • Assets
    • Widgets (Console)
      • Switch
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      • Number Input
      • Image Button
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      • Custom Chart
      • Heatmap Chart
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      • Bitmask Table
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      • Segmented Switch
      • Alarm & Sound Widget
      • Modules
    • Blynk.Air
      • Shipment Details
      • Shipment Management
        • New Shipping
      • Device shipment statuses
      • User-Controlled Shipments
    • Settings
      • Organization Settings
        • General
        • Users
        • Locations (Job Site or Facilities)
        • Tags
      • Roles and Permissions
      • Developers
        • OAuth2
        • Webhooks
        • Create New Webhook
      • Integrations
    • User Profile Menu
    • Limits
  • Blynk.Apps
    • Overview
    • Mobile Dashboard Editor
    • Device Header Constructor
      • Header Design
      • Header Mini Widgets
        • Connection Status Widget
        • Last Reported Widget
        • Tabs Widget
        • Datastream Value Widget
        • Image Widget
        • Battery Level Widget
        • Signal Level Widget
        • Tags Widget
      • Header Buttons
    • Pages
    • Widgets (app)
      • Common Widget Settings
      • List of Datastreams types supported by Widgets
    • Widgets Controllers
      • Button
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      • Joystick
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      • RGB Light Control
      • Step H
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      • Level Slider with Switch
    • Widgets Displays
      • Value Display
      • Labeled Value
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    • Widgets Interface
      • Tabs
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      • Music Player
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      • Alias Name
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    • Devices
      • Add New Device
    • Automations
    • Notifications & Events
  • Blynk.Edgent
    • Blynk.Edgent overview
    • Blynk.Inject and Blynk.Air
    • OTA: Firmware Over-The-Air updates
  • Blynk.NCP
    • Blynk.NCP overview
    • Supported Connectivity Modules
    • OTA: Firmware Over-The-Air updates
  • Blynk Library - firmware API
    • Installation
      • Install Blynk Library in Arduino IDE
      • Install Blynk Library for Platformio.org
      • Install ESP8266 core for Arduino IDE
    • Configuration
    • Connection Management
    • Device Online/Offline Status
    • Digital/Analog Pins
    • Virtual Pins
    • Widget Properties
    • State Syncing
    • Timers
    • Time (RTC clock)
    • Timezone / Location
    • Log Event
    • Metadata
    • Debug
    • Reboot
    • Over-The-Air Firmware Updates (OTA)
    • Other
    • Limitations and Recommendations
    • Blynk Protocol
  • BLYNK.CLOUD MQTT API
    • Device MQTT API
      • Authentication
      • Topic Structure
      • Datastreams
      • Widget Properties
      • Events
      • Metadata
      • Timezone/Location
      • OTA
      • Miscelaneous
      • Code Examples
  • BLYNK.CLOUD HTTPS API
    • Device HTTPS API
      • Get Datastream Value
      • Get Multiple Datastream Values
      • Get Historical Data From Device
      • Update Datastream Value
      • Update Multiple Datastreams Simultaneously
      • Upload a Set of Timestamped Data
      • Update Widget/Datastream Property
      • Send/Log An Event
      • Get Device Metadata Value
      • Update Device Metadata Value
      • Is Device Connected
      • Upload a File
      • HTTPS API Troubleshooting
    • Platform API
      • Authentication
      • Ogranization API
        • Get Own Organization Info
        • Get Organization Info
        • Search Organizations
        • Create Organization
        • Get Static Tokens
        • Get Organization Tags
        • Get Organization Automations
      • Devices API
        • Get All Devices
        • Search Devices
        • Get Devices by Owner Email
        • Get Devices in user organization
        • Get Recently Activated Devices
        • Get Device Info
        • Get Connection Status
        • Create Device
        • Edit Device
        • Get Datastream Values
        • Update Datastream Value
        • Update Multiple Datastreams Values
        • Import Datastream Values
        • Update Datastream Property
        • Get Datastream Historical Data
        • Get Device Metadata
        • Update Device Metadata
        • Get Device Tags
        • Get Device Timeline Log
        • Log a Device Event
        • Get Actions Log
        • Erase All Data
        • Remove Device Owner
        • Transfer Device
        • Delete Device
      • Users API
        • Get All Users
        • Search Users
        • Create New User
        • Invite User
        • Get User Info
        • Update User Role
      • Templates API
        • Get All Templates
        • Get Template Info
        • Get Template Metadata
        • Get Template Datastreams
        • Get Template Events
    • Security
  • Downloads
    • Blynk Mobile Apps
    • Blynk Library
  • Troubleshooting
    • General Issues
    • Developer Mode
    • Changes from Blynk 0.1
      • Migrating to the new Blynk - Full Guide
    • Glossary
    • Links
  • Commercial Use
    • Deploying Products With Dynamic AuthTokens
    • Deploying Products With Static Tokens
    • Working With Clients
    • Supported topologies
    • Business Plan (White Label Solution)
      • App Publishing Process And Timeline
      • What's Needed To Publish Your Apps And Go Live
      • Branding Materials
      • Custom Email Address For Transactional Emails
      • Application Settings
        • General
        • Design
        • Mobile Apps
        • Sign Up
  • Add-Ons
    • Add-on list
    • Amazon Alexa
    • Google Assistant
    • Localization
    • Database Access
    • Marketing
Powered by GitBook
On this page
  • Can’t log in
  • No email received
  • No connection to server
  • I can't see all metadata in Blynk.Apps
  • Device is offline
  • "Not correct device" during add device
  • I can't erase data from a device
  • There are no devices in Blynk.Apps Automation
  • I press button or move slider and nothing happens to the device
  • I can't download device report
  • My hardware constantly disconnected

Was this helpful?

  1. Troubleshooting

General Issues

Can’t log in

What could be the reason:

  • wrong email address

  • the password is incorrect

  • the user with the specified email address is not registered in the system

What’s the solution:

  • specify correct email address

  • be sure to type the correct password

  • reset password

  • check the specified email inbox to be sure it's registered in the system

  • register with a different email address

No email received

What could be the reason:

  • you entered an incorrect email address

  • the letter got into the spam folder

  • email server issues

What’s the solution:

  • specify correct email address

  • check your spam folder

  • contact you mail server administrator

No connection to server

What could be the reason:

  • you do not have an internet connection

  • the server is rebooting

  • intermediate providers issues

What’s the solution:

  • check your internet connection

  • you should wait for a while to reboot the server

  • run traceroute command in your OS terminal, contact your ISP and provide them with this data

I can't see all metadata in Blynk.Apps

What could be the reason:

  • not all metadata can be viewed now due to it's not implemented yet

What’s the solution:

  • view full metadata list in Blynk.Console

  • wait for Blynk.Apps full metadata support and update Blynk.Apps regularly

Device is offline

What could be the reason:

  • connectivity issues

  • auth token was changed

  • Wi-Fi network SSID or password was changed

  • old version of library or even beta version is used

  • outdated ESP core version

What’s the solution:

  • check if the device is powered on

  • check your internet connection between the device and Blynk.Cloud (mind Wi-Fi signal strength and distance)

  • connect to your device and check if it's auth token matches one in Blynk.Cloud

  • be sure to use the latest version of library, otherwise re-flash and launch Device Reprovision process

  • check your ESP core version is up to date, otherwise re-flash and launch Device Reprovision process

"Not correct device" during add device

What could be the reason:

  • device board hardware is not supported by the Template

  • device Template ID mismatch

  • wrong Template Name

What’s the solution:

  • be sure to use the hardware that is mentioned in Template's Info page

  • be sure you paste correct BLYNK_TEMPLATE_ID to the sketch

  • be sure you paste correct BLYNK_TEMPLATE_NAME to the sketch

I can't erase data from a device

What could be the reason:

  • some time is required to erase all device data

  • there was network disconnection during the command send

What’s the solution:

  • wait for up to 5 minutes and re-check device's data

  • check your network connection, re-send the command

What could be the reason:

  • there are no templates you can use at the moment

  • there are no devices added and available to access

  • device template has no datastreams allowed for automations

What’s the solution:

  • create a template or ask your organization admin for it

  • add a device so you can access it from Devices tab

  • check for the template to have required datastreams are exposed to automations

I press button or move slider and nothing happens to the device

What could be the reason:

  • connectivity issues

  • device issues

What’s the solution:

  • check your internet connection for both: device and smartphone/PC (Blynk is a cloud platform, there's no offline support)

  • be sure that device is powered on and has no circuit or physical damage

I can't download device report

What could be the reason:

  • connectivity issues

  • no data for the selected device

  • you have no permissions to do that

What’s the solution:

  • check your internet connection

  • no report can be provided for download if there's no data for it

  • contact your organization administrator

My hardware constantly disconnected

There are multiple reasons why your hardware could be disconnected. In order to eliminate some obvious reasons, please do the next:

  • Run ping blynk.cloud. If your connection is good you should see the ping less than 200ms. If you see the higher ping it could be a reason for disconnections

  • In case your hardware uses Wi-Fi - check your Wi-Fi signal strength, and make sure there is no other noise that case decrease the signal level

  • Make sure you don't use delay() instructions in your firmware, long delay in your sketch can break the persistent connection with Blynk Cloud

  • Checkout your serial console output, make sure it doesn't contain crashes or other error that may lead to connection interrupts

  • Make sure you don't send a huge number of virtualWrite commands per seconds. Blynk Cloud doesn't allow to send more than 20 requests per seconds. Connections that exceeds the limit are closed

PreviousBlynk LibraryNextDeveloper Mode

Last updated 2 years ago

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Automation