Flipper Zero WiFi Multiboard (ESP8266) — Complete Guide
One-liner: the WiFi multiboard is an ESP8266-powered WiFi tool for the Flipper Zero — typically pre-flashed with the ESP8266 Deauther firmware — giving you AP scanning, packet monitoring and (on your own networks) deauth testing, plus a standalone web UI you control from any browser.
Specs at a glance
| Item | Specification |
|---|---|
| WiFi chip | Espressif ESP8266 (2.4 GHz, 802.11 b/g/n) |
| Firmware (typical) | ESP8266 Deauther v2 (Spacehuhn) or ESP8266 Marauder port |
| Frequency band | 2.4 GHz only (no 5 GHz) |
| Interface | UART serial to Flipper GPIO (TX/RX) |
| Power | From the Flipper GPIO (3.3 V) |
| Extras (board-dependent) | Socket for a second radio module (NRF24 / CC1101), dip switch for radio selection |
| Web UI | AP mode at 192.168.4.1 (default SSID pwned, password deauther) |
What you can do with it
The ESP8266 Deauther is the classic pocket tool: scan for networks, pick a target, and run attack modes (deauth, beacon spam) — with the Flipper as the control surface. Because the ESP8266 also exposes its own access point, you can drive everything from a phone browser at http://192.168.4.1 — the Flipper screen is optional.
Use it on networks you own or have explicit permission to test. Deauth attacks actively disrupt other people's connections; using them on networks you don't control is illegal in most places. The whole point of this tool in a university lab is to learn why unsecured WiFi fails and how to defend it.
Setup
1. Firmware on the Flipper
Install a custom firmware (Momentum, Unleashed, Xtreme) so the WiFi deauther/Marauder apps are available — see the Flipper Zero section.
2. Flash the ESP8266 (first time only)
Most boards ship pre-flashed with Deauther. To (re)flash:
- Put the board in flash mode per your vendor's instructions (often a button while powering).
- Connect via USB/UART (or use the Flipper's own flasher app).
- Flash the ESP8266 Deauther v2 binary — sources and pre-built files: SpacehuhnTech/esp8266_deauther.
3. Wire / attach to the Flipper
| ESP8266 | Flipper GPIO |
|---|---|
| TX0 | 14 or 16 (RX pin) |
| RX0 | 13 or 15 (TX pin) |
| VIN | 1 (5V) or 9 (3.3 V) |
| GND | 8 or 11 (GND) |
On multi-radio boards, set the dip switch to the WiFi/ESP8266 position before use.
4. First run — scan
- Plug the board in, open
Apps → WiFi → WiFi Deauther. - Wait for the startup scan to finish (the blue LED goes off).
- A list of nearby APs appears: SSID, channel, RSSI.
Expected app screen:
# SSID CH RSSI
1 yupitek-lab 6 -55
2 Library_Guest 1 -78
...
Using the web UI
- On your phone/PC, join the WiFi network
pwned(passworddeauther). - Browse to
http://192.168.4.1. - The full Deauther interface loads: scan, select target, configure attacks, save settings.
- Tip: when only using the Flipper for serial control, you can disable the web interface (
set webinterface false, save, reboot) to hide thepwnedAP.
Troubleshooting
| Problem | Cause | Fix |
|---|---|---|
| Web UI unreachable | Client joined another network | Disable auto-join/mobile data; join pwned; browse 192.168.4.1 |
| App freezes at startup | Interrupted startup scan | Wait for the blue LED to go off before touching controls |
| No networks listed | Wrong dip switch / pins | Set switch to WiFi; re-check TX/RX wiring |
| Board not detected | UART pins wrong | Use pins 13/15 (TX) and 14/16 (RX) |
| Weak or no signal | 2.4 GHz antenna orientation | Attach/aim the SMA antenna |
More help: the SDRLAB troubleshooting hub.
Related
- 5G Expansion Board — 2.4/5 GHz Marauder with GPS.
- NRF24 module — 2.4 GHz packet radio sniffing.
- Flipper Zero section — firmware basics.