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README.md

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+# PiFi
+
+This is a simple tool to create and manage a hotspot on a Raspberry Pi (ARM64).  
+The code is based on https://github.com/NetworkManager/NetworkManager/blob/main/examples/python/dbus/wifi-hotspot.py
+and adds following features:
+
+- Environment variables or intput parameters for SSID and password
+- Option to remove the connection
+
+## Build
+
+```bash
+make build
+```
+
+## Usage
+
+```bash
+sudo ./pifi wlan0 up "My Hotspot" "my password"
+sudo ./pifi wlan0 down
+sudo ./pifi wlan0 remove
+```
+
+## Environment variables
+
+The hotspot will use the environment variables `WIFI_SSID` and `WIFI_PASSWORD` if they are set.
+
+```bash
+export WIFI_SSID="My Hotspot"
+export WIFI_PASSWORD="my password"
+
+sudo -E ./pifi wlan0 up
+```