NVDK-ESP32 WiFi Access, Security, Station, AP
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This document discusses WiFi technology, wireless devices, and wireless security. It provides an overview of WiFi including that it uses 2.4GHz and 5.8GHz bands and SSIDs to identify networks. Common wireless devices are access points, stations, routers, and repeaters. Basic security methods are disabling SSID broadcast and using MAC address filtering, but WPA2 is recommended. Instructions are given for configuring an ESP32 as a WiFi station to scan for networks and as a soft AP.
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NVDK-ESP32 WiFi Access, Security, Station, AP
- 1. NVDK-ESP32 WiFi WiFi Access, Network Security, Station, Access Point
- 2. WiFi - Overview • Technology for Wireless LAN based on 802.11 • MAC and PHY Layer specifications of Wireless LAN • Uses 2.4GHz and 5.8 GHz ISM Radio bands • Service Set Identifier ( SSID ) • 32 Byte identifier for every wireless network • Devices uses the WiFi Technology, • PC, Laptop, Smart Phone, Cameras, Smart TVs, Audio Player & Printers
- 3. Wireless Devices • Wireless Access Point • Connects a group of wireless device to an LAN • Wireless Station • Device which connects with the wireless network • Wireless Router • Connect wired and wireless device to single WAN device like ADSL, etc • Wireless network bridge • Connects a wired network to a wireless network • Wireless Repeater • Extends the range of existing wireless network
- 4. Wireless Security • Disable the SSID broadcast • Allow only the wireless device with known MAC Addresses • Wired Equivalent Policy • Protect against casual snooping, no longer considered secure • Can be easily recovered using tools like AirSnort, AirCrack-ng • WPA2 • WiFi Protected Access 2 • Supported by most of Wireless Devices / Networks
- 5. NVDK-ESP32 Station $ cd ~/esp $ cp –rf ~/esp/esp-idf/examples/wifi/scan/ ./ $ cd scan $ make menuconfig $ make all • bootloader.bin – 0x1000 • scan.bin – 0x10000 • partitions_singleapp.bin – 0x8000
- 6. NVDK-ESP32 Soft AP $ cd ~/esp $ cp –rf ~/esp/esp-idf/examples/wifi/scan/ ./ $ cd scan $ make menuconfig $ make all • bootloader.bin – 0x1000 • Simple_wifi.bin – 0x10000 • partitions_singleapp.bin – 0x8000
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