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  • outdated ESP core version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 Product 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_DEVICE_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

There are no devices in Blynk.Apps Automation

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
Last modified 2mo ago