How to Build a DIY WiFi Extender from Scraps to Boost Your Signal


Having weak WiFi signal in parts of your home or office can be frustrating. A simple DIY WiFi extender made from spare parts can help boost your signal coverage quickly and cheaply. In this guide, I will walk through the process of building your own WiFi extender from scraps to amplify your wireless network.

Benefits of a DIY WiFi Extender

Building your own WiFi extender has several advantages:

How WiFi Extenders Work

WiFi extenders work by picking up the existing WiFi signal, amplifying it, and rebroadcasting it. This helps reach areas where the original signal is weak. There are two main types of extenders:

We will build a simple repeater-style extender for seamless signal boosting throughout your environment.

Parts and Tools Needed

Building a WiFi extender from scratch requires gathering some key components:

You will also need basic tools like a soldering iron, drill, pliers, and screwdriver.

Software Setup

With the hardware ready, software configuration is next:

  1. Flash Raspberry Pi OS onto the MicroSD card and insert into the Pi.

  2. Connect the Pi to your router via Ethernet and power it on. Alternatively, connect a monitor and keyboard to configure.

  3. SSH into the Pi or access the terminal. Update packages - sudo apt update && sudo apt full-upgrade.

  4. Install required software like DNSMasq and Hostapd - sudo apt install dnsmasq hostapd.

  5. Edit Hostapd config at /etc/hostapd/hostapd.conf to set SSID, WiFi password, and channel.

  6. Edit Dnsmasq config at /etc/dnsmasq.conf to set IP address range and DHCP options.

  7. Set static IP on the WiFi adapter by editing /etc/dhcpcd.conf.

  8. Enable IP forwarding in Sysctl - sudo nano /etc/sysctl.conf. Set net.ipv4.ip_forward=1.

  9. Reboot Pi to apply changes - sudo reboot now.

Constructing the Hardware

With software configured, construct the physical extender unit:

Troubleshooting Issues

If your DIY WiFi extender isn't working properly, a few fixes to try:


Building your own WiFi extender from spare parts is a fun, educational project that can significantly improve your wireless signal coverage. With the right Raspberry Pi setup and configuration, you can make an inexpensive and customizable repeater-style extender perfect for your environment. Boost your home or office WiFi today!