8266 ESP-01 (stand alone) connect to Wi-Fi but not to Blynk

[PeteKnight]

@jchonghing

Blynk Library version: 1.0.0 beta 3

First things first, uninstall this library and install 0.6.1 instead and re-test.

@jchonghing

using a USB to ESP-01 Adapter (have a switch to program or uart)

In UART mode, what does your serial monitor show?

@jchonghing

a led connected to the GPIO2

Try disconnecting the LED and re-testing.

Incidentally, your sketch shows no code to control the LED attached to GPIO2, so I assume that you are planning on using digital pins for your app widgets.
Once you have your current code working, you should forget digital pins and switch to virtual pins for your actual project.

Read this:

Using Virtual Pins to control physical devices

I thought I’d write a guide about how to use virtual pins with app widgets such as buttons, to control physical devices such as relays, LEDs etc… Why use virtual pins anyway? I’d always recommend using virtual pins over physical pins when developing your code. There are a number of reasons, but here are what I consider to be the main ones: Virtual pins are hardware independent. This means that it’s far easier to port your code from one hardware platform to another in future (when you realise…

Pete.