# ESP8266 standalone

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![](https://camo.githubusercontent.com/38e041c5e75007dc2b15300d41d13d364cd6695a/68747470733a2f2f73746174696373332e736565656473747564696f2e636f6d2f696d616765732f313133393930313035253230312e6a7067)

ESP8266-based boards, like `NodeMCU, Huzzah, WeMos D1, Seeed Wio Link, ...` can run Blynk directly on the chip, using this board support package: <https://github.com/esp8266/Arduino>

### Tutorials <a href="#tutorials" id="tutorials"></a>

* Getting started with Blynk: <https://learn.sparkfun.com/tutorials/esp8266-thing-development-board-hookup-guide/example-sketch-blink-with-blynk>
* Getting started with ESP8266: <http://www.esp8266.com/wiki/doku.php?id=getting-started-with-the-esp8266>

### Troubleshooting <a href="#troubleshooting" id="troubleshooting"></a>

* ESP8266 can't be powered directly from 3v3 pin on most Arduinos, as it requires more than 400 mA current supply.&#x20;
* ESP8266 flash might get broken. The code executes without problem right after flashing, but stops working after first reboot.
* This WiFi module can somehow interfere with PIR sensors -> PIR sensor starts producing random values ;)
* ESP8266 currently has troubles with connecting to **WPA2-Enterprise** networks, and WiFi hotspots that have **Captive Portal** (webpage that requires you to sign-in to get Internet access).<br>

### Low level debugging <a href="#low-level-debugging" id="low-level-debugging"></a>

1. In the IDE switch to **Generic ESP8266** board.
2. In setup() add the following as the first line:\
   &#x20;   `Serial.setDebugOutput(true);`
3. In the IDE set **Debug port** to `Serial`  and **Debug level** to `All` .

You will see a huge amount of debugging information in Serial Monitor.


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