Add details :
• Hardware model + communication type. For example: Arduino UNO with Ethernet Shield
• Smartphone OS (iOS or Android) + version
• Blynk server or local server
• Blynk Library version
• Add your sketch code. Code should be formatted as example below.
Simply paste your code between ``` If you don’t format your code, your topic can be deleted by moderators.
Without that level of details we can only guess at what the issue might be.
It would also help if you explained how you’ve wired-up your Arduino and ESP-01 and how you’re powering them.