In this article, we will explore the concept of preventing Access Point (AP) switching drops using Dual WLAN Bonding on a Raspberry Pi, specifically for those using DonkeyCar and operating public Wi-Fi with multiple APs.
Context and Key Concepts
In a real-time video-feed setup, such as DonkeyCar, brief connection drops can result in significant disruptions. One of the primary causes of these drops is the handoff between multiple access points (APs) in a public Wi-Fi setup. Dual WLAN Bonding is a technique that can help mitigate this issue by combining two wireless links to increase bandwidth and provide network redundancy.
Access Point Switching Drops
Access point switching drops occur when a device transitions from one access point to another in a Wi-Fi network, resulting in a brief interruption in connectivity. In a real-time video-feed setup like DonkeyCar, these drops can cause significant issues, such as loss of control or temporary freezing of the video feed.
Dual WLAN Bonding
Dual WLAN Bonding is a technique that combines two wireless links into a single logical link, providing network redundancy and increased bandwidth. By using two Wi-Fi adapters and two access points, we can ensure that the Raspberry Pi stays connected to the network, even during AP switching.
Setting Up Dual WLAN Bonding on Raspberry Pi
The following steps will guide you through setting up Dual WLAN Bonding on your Raspberry Pi:
Install Required Packages
First, install the required packages by running the following commands:
sudo apt-get update
sudo apt-get install ifenslave bonding
Configure Wireless Interfaces
Next, ensure that both wireless interfaces are configured and brought up:
sudo nano /etc/network/interfaces
...
allow-hotplug wlan0
iface wlan0 inet manual
...
allow-hotplug wlan1
iface wlan1 inet manual
...
Configure Bonding Interface
Create a new bonding interface and edit the configuration file:
sudo nano /etc/network/interfaces
...
auto bond0
iface bond0 inet manual
bond-master bond0
bond-mode 802.3ad
bond-miimon 100
bond-downdelay 200
bond-updelay 200
bond-slaves wlan0 wlan1
...
Restart Networking Services
Restart the networking services:
sudo service networking restart
Troubleshooting
If you encounter issues with Dual WLAN Bonding, ensure that both wireless interfaces are configured correctly and that they are associated with different access points.
- Access Point switching drops can cause significant disruptions in real-time video-feed setups like DonkeyCar.
- Dual WLAN Bonding is a technique that combines two wireless links into a single logical link, providing network redundancy and increased bandwidth.
- By following the steps outlined in this article, you can set up Dual WLAN Bonding on your Raspberry Pi, improving the connectivity and reliability of your Wi-Fi network.
References
- Debian Bonding - Debian Wiki page describing the bonding feature
- Raspberry Pi Forums - Community discussion on bonding multiple interfaces
- Balena Blog - Improving Wi-Fi on Raspberry Pi using external USB adapters