I Can’t Sign Up or Log In

Check that correct hardware and port are used when uploading the sketch
Potential Reasons:
  • Wrong email address
  • The password is incorrect
  • The user with the specified email address is not registered in the system
Check that your device connects to 2.4 WiFi network
  • 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

Potential Reasons:
  • You entered an incorrect email address
  • The email got into the SPAM folder
  • Email server issues
  • Specify correct email address
  • Check your SPAM folder
  • Contact you mail server administrator

No Connection to Cloud Server

Potential Reasons:
  • You do not have an Internet connection
  • The server is rebooting
  • Intermediate providers issues
  • 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

Device is Offline

Potential Reasons:
  • Connectivity issues
  • Incorrect SSID or password in the sketch code
  • SSID or password are not specified in the sketch code
  • Old version of library or even beta version is used
  • Outdated ESP core version
  • Check if the device is powered on
  • Check your Internet connection between the device and Blynk.Cloud (mind Wi-Fi signal strength and distance)
  • 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
Checked all of the above and are still unsure what’s going wrong? Contact our technical support team for prompt help (available with PRO plan).