Raspberry PI Wi-Fi Config

README.md

1. Disable Wi-Fi Power Saving

1.1 Concept

NetworkManager may enable Wi-Fi power saving by default. To ensure stable networking, set wifi.powersave = 2 to disable power saving.

NetworkManager Power Save Values

Value	Meaning
0	Default
1	Enable power saving
2	Disable power saving
3	Force enable

1.2 Create or Modify Configuration File

Open the configuration file:

sudo nano /etc/NetworkManager/conf.d/wifi-powersave.conf

Insert the following content:

[connection]
wifi.powersave = 2

• [connection] defines the NetworkManager connection configuration section.
• wifi.powersave = 2 disables Wi-Fi power saving.

1.3 Restart NetworkManager

Apply the changes by restarting the service:

sudo systemctl restart NetworkManager

Check service status:

systemctl status NetworkManager

2. Enable Automatic Wi-Fi Reconnection

2.1 Verify Connection Profile Name

List available connections:

nmcli connection show

Example output:

NAME       UUID                                  TYPE      DEVICE
mywifi     xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx  wifi      wlan0

Ensure the connection name is exactly mywifi.

2.2 Enable Autoconnect

sudo nmcli connection modify mywifi connection.autoconnect yes

Function

• Automatically reconnect when Wi-Fi disconnects.
• Automatically connect at system boot.

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2.3 Set Autoconnect Priority

sudo nmcli connection modify mywifi connection.autoconnect-priority 20

Priority Behavior

If multiple Wi-Fi profiles exist, NetworkManager selects the highest priority value.

Default priority: 0 Higher value = Higher connection preference.

Example:

Profile	Priority
home	10
mywifi	20
mobile	5

In this case, mywifi connects first.

2.4 Verify Configuration

nmcli connection show mywifi | grep autoconnect

Expected output:

connection.autoconnect:                 yes
connection.autoconnect-priority:        20

3. Troubleshooting

3.1 Confirm Configuration File

cat /etc/NetworkManager/conf.d/wifi-powersave.conf

3.2 Check Current Power Save Status

iw dev wlan0 get power_save

Expected output:

Power save: off