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**Referring to this project as "jammer" is prohibited! Name the project by its correct name.**
I disabled the issue section because of the flood of invalid questions, unrelated to this project.
All necessary information is described below. Do not open issues about this project on any other of my projects, otherwise you will be blocked immediately!
**This project is a proof of concept for testing and education only.**
Neither the ESP8266, nor the SDK was meant and build for such purposes.
Bugs can occur!
**New official supported boards available!**
Go to [Supported Devices](#supported-devices) for more.
- [Sources and additional links](#sources-and-additional-links)
## Introduction ##
### What it is
Basically it’s a device which performs a [deauth attack](https://en.wikipedia.org/wiki/Wi-Fi_deauthentication_attack).
You select the clients you want to disconnect from their network and start the attack. As long as the attack is running, the
selected devices are unable to connect to their network.
Other attacks also have been implemented, such as beacon or probe request flooding.
### How it works
The 802.11 Wi-Fi protocol contains a so called [deauthentication frame](https://mrncciew.com/2014/10/11/802-11-mgmt-deauth-disassociation-frames/). It is used to disconnect clients safely from a wireless
network.
Because these management packets are unencrypted, you just need the mac address of the Wi-Fi router and of the client device which you want to disconnect from the network. You don’t need to be in the network or know the password, it’s enough to be in its range.
### What an ESP8266 is
The [ESP8266](https://en.wikipedia.org/wiki/ESP8266) is a cheap micro controller with built-in Wi-Fi. It contains a powerful 160 MHz processor and it can be programmed using [Arduino](https://www.arduino.cc/en/Main/Software).
You can buy these chips for under $2 from China!
### How to protect against it
With [802.11w-2009](https://en.wikipedia.org/wiki/IEEE_802.11w-2009) Wi-Fi got an update to encrypt management frames.
So make sure your router is up to date and has management frame protection enabled. But note that your client device needs to
support it too, both ends need to have it enabled!
The only problem is that most devices don’t use it. I tested it with different Wi-Fi networks and devices, it worked every time! It seems that even newer devices which support frame protection don’t use it by default.
I made a [Deauth Detector](https://github.com/spacehuhn/DeauthDetector) using the same chip to indicate if such an attack is running against a nearby network. It doesn't protect you against it, but it can help you figure out if and when an attack is running.
## Disclaimer
Use it only for testing purposes on your own devices!
I don't take any responsibility for what you do with this program.
Please check the legal regulations in your country before using it.
**It is not a frequency jammer as claimed falsely by many people.** Its attack, how it works and how to protect against it is described above. It uses valid Wi-Fi frames described in the official 802.11 standard and doesn't block or disrupt any other communications or frequencies.
Referring to this project as "jammer" is prohibited! Name the project by its correct name.
[](https://www.youtube.com/watch?v=SswI-J-M2SE)
[](https://www.youtube.com/watch?v=YYsSDXRgD10)
## Installation
The only things you will need are a computer and an ESP8266 board.
I recommend you to buy a USB breakout/developer board, because they have 4Mb flash and are very simple to use.
It doesn’t matter which board you use, as long as it has an ESP8266 on it.
You have 2 choices here. Uploading the bin files is easier but not as good for debugging.
**YOU ONLY NEED TO DO ONE OF THE INSTALLATION METHODS!**
### Uploading the bin files
**Note:** the 512kb version won't have the full MAC vendor list.
The NodeMCU and every other board use the ESP-12 which has 4mb flash on it.
**0** Download the current release from [here](https://github.com/spacehuhn/esp8266_deauther/releases)
**1** Upload using the ESP8266 flash tool of your choice. I recommend using the [nodemcu-flasher](https://github.com/nodemcu/nodemcu-flasher). If this doesn't work you can also use the official [esptool](https://github.com/espressif/esptool) from espressif.
**That's all! :)**
Make sure you select the right com-port, the right upload size of your ESP8266 and the right bin file.
If flashing the bin files with a flash tool is not working, try flashing the esp8266 with the Arduino IDE as shown below.
### Compiling the source with Arduino
**0** Download the source code of this project.
**1** Install [Arduino](https://www.arduino.cc/en/Main/Software) and open it.
**2** Go to `File` > `Preferences`
**3** Add `http://arduino.esp8266.com/stable/package_esp8266com_index.json` to the Additional Boards Manager URLs. (source: https://github.com/esp8266/Arduino)
**4** Go to `Tools` > `Board` > `Boards Manager`
**5** Type in `esp8266`
**6** Select version `2.0.0` and click on `Install` (**must be version 2.0.0!**)
**7** Go to `File` > `Preferences`
**8** Open the folder path under `More preferences can be edited directly in the file`
**9** Go to `packages` > `esp8266` > `hardware` > `esp8266` > `2.0.0` > `tools` > `sdk` > `include`
**10** Open `user_interface.h` with a text editor
**11** Scroll down and before `#endif` add following lines:
`int wifi_send_pkt_freedom(uint8 *buf, int len, bool sys_seq);`
**don't forget to save!**
**12** Go to the SDK_fix folder of this project
**13** Copy ESP8266Wi-Fi.cpp and ESP8266Wi-Fi.h
**14** Paste these files here `packages` > `esp8266` > `hardware` > `esp8266` > `2.0.0` > `libraries` > `ESP8266WiFi` > `src`
**15** Open `esp8266_deauther` > `esp8266_deauther.ino` in Arduino
**16** Select your ESP8266 board at `Tools` > `Board` and the right port at `Tools` > `Port`
If no port shows up you may have to reinstall the drivers.
**17** Depending on your board you may have to adjust the `Tools` > `Board` > `Flash Frequency` and the `Tools` > `Board` > `Flash Size`. In my case i had to use a `80MHz` Flash Frequency, and a `4M (1M SPIFFS)` Flash Size
**18** Upload!
**Note:** If you use a 512kb version of the ESP8266, you need to comment out a part of the mac vendor list in data.h.
**Your ESP8266 Deauther is now ready!**
### Adding OLED display
**0** Follow the steps [above](#compiling-the-source-with-arduino) to get your Arduino environment ready.
**1** Install this OLED driver library: https://github.com/squix78/esp8266-oled-ssd1306
**2** Customize the code for your wiring.
In `esp8266_deauther.ino` uncomment `#define USE_DISPLAY`.
Then scroll down and customize these lines depending on your setup.
I used a Wemos d1 mini with a SSD1306 128x64 OLED and 3 push buttons.
