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Introduction
Getting Started
Quickstart
Developer Mode
Device Activation Methods
Template Quick Setup
Control Devices (GPIOs and beyond)
Send Data From Hardware To Blynk
Events
Notifications (Alerts)
Manage Notifications
OTA: Firmware Over-The-Air updates
Metadata Tutorial
Sign Up / Sign In
Platform overview
Blynk Products and Services
Products
Services
General Concepts
Device
Device Template
Users
Organizations
Multi-tenancy
Automations
Downloads
Blynk Mobile Apps
Blynk.Edgent
Blynk.Console
Overview
Search Data
Devices
Locations
Organizations
Users
Device Templates
Widgets (Console)
Blynk.Air
Settings
User Profile
Limits
Blynk.Apps
Overview
Mobile Dashboard Editor
Pages
Widgets (app)
Main Menu
Devices
Groups
Automations
Notifications
Blynk.Edgent - firmware API
Supported Boards
Installation
Configuration
Connection Management
Device Online/Offline Status
Digital/Analog Pins
Virtual Pins
Widget Properties
State Syncing
Timer
Time (RTC clock)
Timezone / Location
Log Event
Over-The-Air Firmware Updates (OTA)
Metadata
Debug
Reboot
Other
Limitations and Recommendations
Blynk Protocol
BLYNK.CLOUD (HTTPS API)
HTTPs REST API
Get Datastream Value
Get Multiple Datastream Values
Update Datastream Value
Update Multiple Datastreams Simultaneously
Upload a Set of Timestamped Data
Update Widget/Datastream Property
Send/Log An Event
Get Device History Data
Get Device Metadata Value
Is Device Connected
HTTPS API Troubleshooting
Security
Troubleshooting
General Issues
Developer Mode
Changes from Blynk 0.1
Glossary
Links
Commercial Use
Deploying Products With Dynamic AuthTokens
Deploying Products With Static Tokens
Working With Clients (PRO plan)
Supported topologies
Business Plan (White Label Solution)
Legacy Platform Help Articles
Legacy articles
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Limitations and Recommendations
  • Don't put Blynk.virtualWrite and any other Blynk.* command directly inside void loop()- it will cause lot's of outgoing messages to our server and your connection will be terminated;
  • We recommend calling functions with intervals. For example, use BlynkTimer​
  • Avoid using long delays with delay() – it may cause connection breaks;
  • If you send more than 100 values per second - you may cause Flood Error and your hardware will be automatically disconnected from the server;
  • Be careful sending a lot of Blynk.virtualWrite commands as most hardware is not very powerful so it may not handle many requests.
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