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• outdated ESP core version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

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