Wi-Fi: Scan
The Scan sample demonstrates how to use the Nordic Semiconductor’s Wi-Fi® chipset to scan for the access points without using the wpa_supplicant.
Requirements
The sample supports the following development kits:
Hardware platforms |
PCA |
Board name |
Build target |
Shields |
|---|---|---|---|---|
PCA20053 |
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PCA10153 |
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PCA10090 |
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PCA10143 |
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PCA10143 |
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PCA10095 |
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PCA10056 |
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Overview
The sample demonstrates Wi-Fi scan operations in the 2.4 GHz and 5 GHz bands. The sample allows you to perform scan based on below profiles.
Default scan
Active scan
Passive scan
2.4 GHz Active scan
2.4 GHz Passive scan
5 GHz Active scan
5 GHz Passive scan
Scan only non-overlapping channels in the 2.4 GHz band
Scan only non-DFS channels in the 5 GHz band
Scan only non-overlapping channels in the 2.4 GHz and non-DFS channels in the 5 GHz band
Using this sample, the development kit can scan for available access points in STA mode.
Configuration
See Configuring and building an application for information about how to permanently or temporarily change the configuration.
Configuration options
The following sample-specific Kconfig options are used in this sample (located in samples/wifi/scan/Kconfig) :
- CONFIG_WIFI_MAC_ADDRESS
(string) WiFi MAC address
Wi-Fi MAC address to be used by the sample. If not set, the sample will use the default MAC address (locally administrative). This is only used when the nRF7002 OTP is not programmed with a MAC address.
- CONFIG_WIFI_SCAN_INTERVAL_S
(int) Scan interval (seconds)
Specifies the scan interval in seconds.
- CONFIG_WIFI_SCAN_BANDS_LIST
(string) Frequency bands to scan
Specifies the frequency bands to scan, as follows: 2 - 2.4 GHz, 5 - 5 GHz, 6 - 6 GHz, “” - All bands allowed by the regulatory domain. Multiple bands can be specified as comma separated band values. Only regulatory domain permitted values are allowed.
- CONFIG_WIFI_SCAN_CHAN_LIST
(string) Channel list for scan
Specifies the list of channels used to perform scan.
- CONFIG_WIFI_SCAN_DWELL_TIME_ACTIVE
(int) Active scan dwell time
Active scan dwell time (in ms) per channel.
- CONFIG_WIFI_SCAN_DWELL_TIME_PASSIVE
(int) Passive scan dwell time
Passive scan dwell time (in ms) per channel.
- CONFIG_WIFI_SCAN_PROFILE_DEFAULT
(bool) Scan in all bands and channels
Enable this profile to do Wi-Fi scan in all supported bands and channels.
- CONFIG_WIFI_SCAN_PROFILE_ACTIVE
(bool) Active scan
Enable this profile to do active scan where allowed.
- CONFIG_WIFI_SCAN_PROFILE_PASSIVE
(bool) Passive scan
Enable this profile to do passive scan on all channels.
- CONFIG_WIFI_SCAN_PROFILE_2_4GHz_ACTIVE
(bool) Scan in the 2.4 GHz band using active scan
Enable this profile to scan in the 2.4 GHz band using active scanning where allowed.
- CONFIG_WIFI_SCAN_PROFILE_2_4GHz_PASSIVE
(bool) Scan in the 2.4 GHz band using passive scan
Enable this profile to scan in the 2.4 GHz band using passive scanning on all channels.
- CONFIG_WIFI_SCAN_PROFILE_5GHz_ACTIVE
(bool) Scan in the 5 GHz band using active scan
Enable this profile to scan in the 5 GHz band using active scanning where allowed.
- CONFIG_WIFI_SCAN_PROFILE_5GHz_PASSIVE
(bool) Scan in the 5 GHz band using passive scan
Enable this profile to scan in the 5 GHz band using passive scanning on all channels.
- CONFIG_WIFI_SCAN_PROFILE_2_4GHz_NON_OVERLAP_CHAN
(bool) Scan only non-overlapping channels
Enable this profile to scan only non-overlapping channels (1, 6, 11) in the 2.4 GHz band.
- CONFIG_WIFI_SCAN_PROFILE_5GHz_NON_DFS_CHAN
(bool) Scan only non-DFS channels
Enable this profile to scan only non-DFS channels (36, 40, 44, 48, 149, 153, 157, 161, 165) in the 5 GHz band.
- CONFIG_WIFI_SCAN_PROFILE_2_4GHz_NON_OVERLAP_AND_5GHz_NON_DFS_CHAN
(bool) Scan only non-overlapping and non-DFS channels
Enable this profile to scan only non-overlapping channels (1, 6, 11) in the 2.4 GHz band and non-DFS channels (36, 40, 44, 48, 149, 153, 157, 161, 165) in the 5 GHz band.
Building and running
This sample can be found under samples/wifi/scan in the nRF Connect SDK folder structure.
When built as firmware image for the _ns build target, the sample has Cortex-M Security Extensions (CMSE) enabled and separates the firmware between Non-Secure Processing Environment (NSPE) and Secure Processing Environment (SPE).
Because of this, it automatically includes the Trusted Firmware-M (TF-M).
To read more about CMSE, see Processing environments.
To build the sample with Visual Studio Code, follow the steps listed on the How to build an application page in the nRF Connect for VS Code extension documentation. See Configuring and building an application for other building scenarios, Programming an application for programming steps, and Testing and optimization for general information about testing and debugging in the nRF Connect SDK.
To build for the nRF7002 DK, use the nrf7002dk_nrf5340_cpuapp build target.
The following are examples of the CLI commands:
Build to fetch only Device scan results
west build -b nrf7002dk_nrf5340_cpuappBuild to fetch only Raw scan results
west build -b nrf7002dk_nrf5340_cpuapp -- -DCONFIG_WIFI_MGMT_RAW_SCAN_RESULTS=y -DCONFIG_WIFI_MGMT_RAW_SCAN_RESULTS_ONLY=yBuild to fetch both Raw and Device scan results
west build -b nrf7002dk_nrf5340_cpuapp -- -DCONFIG_WIFI_MGMT_RAW_SCAN_RESULTS=y
Testing
After programming the sample to your development kit, complete the following steps to test it:
Connect the kit to the computer using a USB cable. The kit is assigned a COM port (Windows) or ttyACM device (Linux), which is visible in the Device Manager.
Connect to the kit with a terminal emulator (for example, nRF Connect Serial Terminal). See Testing and optimization for the required settings and steps.
The sample shows the following output:
Device scan only results:
Scan requested Num | SSID (len) | Chan | RSSI | Security | BSSID 1 | abcdef 6 | 1 | -37 | WPA/WPA2 | aa:aa:aa:aa:aa:aa 2 | pqrst 5 | 1 | -65 | WPA/WPA2 | xx:xx:xx:xx:xx:xx 3 | AZBYCXD 7 | 1 | -41 | WPA/WPA2 | yy:yy:yy:yy:yy:yy Scan request done
Raw scan only results:
Scan requested Num | len | Frequency | RSSI | RAW_DATA(32 bytes) 1 | 299 | 2412 | -44 | 50 00 3A 01 F4 CE 36 00 10 CE D4 BD 4F E1 F5 33 D4 BD 4F E1 F5 33 A0 7F 0B 05 75 7F D8 00 00 00 2 | 430 | 2412 | -37 | 50 00 3A 01 F4 CE 36 00 10 CE 3C 7C 3F DA DF 38 3C 7C 3F DA DF 38 90 11 69 36 EC 8A 02 00 00 00 3 | 284 | 2412 | -45 | 50 00 3A 01 F4 CE 36 00 10 CE D4 BD 4F 21 F5 38 D4 BD 4F 21 F5 38 20 CF 7B 20 75 7F D8 00 00 00 4 | 299 | 2412 | -43 | 50 00 3A 01 F4 CE 36 00 10 CE D4 BD 4F E1 F5 33 D4 BD 4F E1 F5 33 B0 7F EC 2B 75 7F D8 00 00 00 5 | 409 | 2412 | -38 | 50 00 3A 01 F4 CE 36 00 10 CE A0 36 BC 56 41 E0 A0 36 BC 56 41 E0 60 E2 C7 A5 0F 90 0D 00 00 00 Scan request done
Raw scan and Device scan results:
Scan requested Num | len | Frequency | RSSI | RAW_DATA(32 bytes) 1 | 299 | 2412 | -44 | 50 00 3A 01 F4 CE 36 00 10 CE D4 BD 4F E1 F5 33 D4 BD 4F E1 F5 33 A0 7F 0B 05 75 7F D8 00 00 00 2 | 430 | 2412 | -37 | 50 00 3A 01 F4 CE 36 00 10 CE 3C 7C 3F DA DF 38 3C 7C 3F DA DF 38 90 11 69 36 EC 8A 02 00 00 00 3 | 284 | 2412 | -45 | 50 00 3A 01 F4 CE 36 00 10 CE D4 BD 4F 21 F5 38 D4 BD 4F 21 F5 38 20 CF 7B 20 75 7F D8 00 00 00 4 | abcdef 6 | 1 | -37 | WPA/WPA2 | aa:aa:aa:aa:aa:aa 5 | pqrst 5 | 1 | -65 | WPA/WPA2 | xx:xx:xx:xx:xx:xx 6 | AZBYCXD 7 | 1 | -41 | WPA/WPA2 | yy:yy:yy:yy:yy:yy Scan request done
Default scan results:
Scan requested Num | SSID (len) | Chan | RSSI | Security | BSSID 1 | 0 | 11 | -39 | Open | C2:A5:11:A2:B1:E2 2 | abcdefg 7 | 11 | -39 | Open | BC:A5:11:A2:B1:E2 3 | hijklmno 8 | 48 | -43 | Open | 00:22:CF:E6:AE:99 Scan request done
Active scan results:
Scan requested Num | SSID (len) | Chan | RSSI | Security | BSSID 1 | 0 | 11 | -39 | Open | C2:A5:11:A2:B1:E2 2 | abcdefg 7 | 11 | -39 | Open | BC:A5:11:A2:B1:E2 3 | hijklmno 8 | 48 | -43 | Open | 00:22:CF:E6:AE:99 Scan request done
Passive scan results:
Scan requested Num | SSID (len) | Chan | RSSI | Security | BSSID 1 | 0 | 11 | -39 | Open | C2:A5:11:A2:B1:E2 2 | abcdefg 7 | 11 | -39 | Open | BC:A5:11:A2:B1:E2 3 | hijklmno 8 | 48 | -43 | Open | 00:22:CF:E6:AE:99 Scan request done
2.4 GHz Active scan results:
Scan requested Num | SSID (len) | Chan | RSSI | Security | BSSID 1 | abcdefg 7 | 11 | -39 | Open | BC:A5:11:A2:B1:E2 Scan request done
2.4 GHz Passive scan results:
Scan requested Num | SSID (len) | Chan | RSSI | Security | BSSID 1 | abcdefg 7 | 11 | -39 | Open | BC:A5:11:A2:B1:E2 Scan request done
5 GHz Active scan results:
Scan requested Num | SSID (len) | Chan | RSSI | Security | BSSID 1 | pqrst 5 | 48 | -43 | Open | 00:22:CF:E6:AE:99 Scan request done
5 GHz Passive scan results:
Scan requested Num | SSID (len) | Chan | RSSI | Security | BSSID 1 | pqrst 5 | 48 | -43 | Open | 00:22:CF:E6:AE:99 Scan request done
2.4 GHz non-overlapping channels based scan results:
Scan requested Num | SSID (len) | Chan | RSSI | Security | BSSID 1 | abcdefg 7 | 11 | -39 | Open | BC:A5:11:A2:B1:E2 2 | mnopq 5 | 6 | -75 | Open | F0:1D:2D:73:C4:C1 3 | pqrst 5 | 1 | -77 | Open | DC:33:3D:AB:D1:A8 Scan request done
5 GHz non-DFS channels based scan results:
Scan requested Num | SSID (len) | Chan | RSSI | Security | BSSID 1 | ABCDEFG 7 | 36 | -70 | Open | 48:5D:35:9C:4A:0B 2 | PQRST 5 | 161 | -78 | Open | 50:EB:F6:08:E1:6C 3 | abcd 4 | 165 | -78 | WPA/WPA2 | 08:86:3B:8B:52:9E 4 | KLMNO 5 | 40 | -90 | Open | E8:94:F6:C7:D8:8E Scan request done
2.4 GHz non-overlapping and 5 GHz non-DFS channels based scan results:
Scan requested Num | SSID (len) | Chan | RSSI | Security | BSSID 1 | pqrst 5 | 48 | -43 | Open | 00:22:CF:E6:AE:99 2 | abcdefg 7 | 11 | -39 | Open | BC:A5:11:A2:B1:E2 3 | ABCDE 5 | 40 | -90 | Open | E8:94:F6:C7:D8:8E Scan request done