Introducing stm32-rf-scanner
2.4GHz RF scanner
stm32-rf-scanner contains the source code of an nRF24L01+ and Blue Pill (STM32F103C8T6) based RF scanner. The Blue Pill scans frequencies from 2.400GHz to 2.525GHz (1MHz resolution) with nRF24L01+ and plots the activity on each frequency through UART.
This is what the UART output looks like (explained below):
|------------------------------------------------------------------------------------------------------|-----|-----|
|Frequency layout [GHz] |Ref. |Max. |
|2.4 2.41 2.42 2.43 2.44 2.45 2.46 2.47 2.48 2.49..2.52 |RPD |RPD |
|| | | | | | | | | | | |[pcs]|[pcs]|
|------------------------------------------------------------------------------------------------------|-----|-----|
| :-. :: ::..%%@%@#%@@@%%%%#@@@ .-: :: | 10 | 180 |
|. .... .. . @@#%@@#%@@@%%%%#@@ :: . | 10 | 180 |
| .... ... .%@#%%%%%%%####%##% .. ..:. | 16 | 180 |
| .. ...:##***###%@%%@@@%#@ .::: | 11 | 180 |
| .... ...:... %%%%@%%%%%#***%#%% | 16 | 180 |
|:. . : .:. ..-###%%@###%##%##=: ...:. : | 11 | 180 |
|.. .. .:....: %%%%%%%%%%%@@%%# ::... | 12 | 180 |
|.... ... .. ..@%%@@%%%@%%%%%%% .. .. | 18 | 180 |
| . .::. @%#%%%#########* . | 11 | 180 |
|.. .. ::%%%%@%%%%@%%@@@% .:..: | 12 | 180 |
|..:::: .. . @#**#%***##*#%## .. .-:. | 10 | 180 |
| ... .. ... @%%%%@%%@%%##%%* .. ... . | 13 | 180 |
| .. . .. :*%*%%%%%@%%%%@@% ....... .. | 14 | 180 |
|.. .... .-:::--::------:: .+@@@* ....... | 57 | 180 |
|... .. ....::.:............ -#@@@#. . .. | 72 | 180 |
| .. . .. .. ................ :*@@@# ... .. | 73 | 180 |
| .. ....:............... -+@@@# .. | 73 | 180 |
| ...... ... .................. .##@@%# ..... .. | 74 | 180 |
| .... .......:............... #@@%%= .. .. | 75 | 180 |
|. ... . .... :::::::::::::::: *#@@%* | 38 | 180 |
|:.... .. ..@#**##**%**+**** ... ... | 14 | 180 |
|... . ... %**%%%%@%%##%#*# .. .. | 16 | 180 |
| . .. ....##*#%###*%%#%@## .....: | 14 | 180 |
Unknown sig. Unknown sig. Wi-Fi (WLAN 6) Microwave oven Unknown sig.
The axes:
f[GHz]
------------->
|
t |
[s] |
|
V
The time difference between each line is ~4s. The greyscale characters represent the signal strengths relative to each other. The signal classification has been added manually.
The code of this project has been implemented using
A detailed description can be found in docs/project_description.md.
A similar, Arduino libraries based design by cpixip can be found at forum.arduino.cc.
Deployment
Important: the project has been developed and tested on Windows only.
Quick deployment process:
- Build the SW from command line with
makeandarm-none-eabi-gcc:
cd <path>\stm32-rf-scanner\src\Debug
make all
- Connect the configured pins (SWD, SPI and UART). Refer to docs/project_description.md#pin-description.
- Download the binary to the Blue Pill with STM32CubeProgrammer.
- Run the SW and plot the UART output using an USB-UART adapter and a serial port terminal.
Note: the SW can be built from Eclipse also. .project is stored in src.
Results
Measurement results are stored in the meas folder:
data0wi-fi+_microwave_oven.log
|------------------------------------------------------------------------------------------------------------------------------|-----|-----|
|Frequency layout [GHz] |Ref. |Max. |
|2.4 2.41 2.42 2.43 2.44 2.45 2.46 2.47 2.48 2.49 2.5 2.51 2.52 |RPD |RPD |
|| | | | | | | | | | | | | |[pcs]|[pcs]|
|------------------------------------------------------------------------------------------------------------------------------|-----|-----|
| :-. :: ::..%%@%@#%@@@%%%%#@@@ .-: :: | 10 | 180 |
|. .... .. . @@#%@@#%@@@%%%%#@@ :: . | 10 | 180 |
| .... ... .%@#%%%%%%%####%##% .. ..:. | 16 | 180 |
| .. ...:##***###%@%%@@@%#@ .::: | 11 | 180 |
| .... ...:... %%%%@%%%%%#***%#%% | 16 | 180 |
|:. . : .:. ..-###%%@###%##%##=: ...:. : | 11 | 180 |
|.. .. .:....: %%%%%%%%%%%@@%%# ::... | 12 | 180 |
|.... ... .. ..@%%@@%%%@%%%%%%% .. .. | 18 | 180 |
| . .::. @%#%%%#########* . | 11 | 180 |
|.. .. ::%%%%@%%%%@%%@@@% .:..: | 12 | 180 |
|..:::: .. . @#**#%***##*#%## .. .-:. | 10 | 180 |
| ... .. ... @%%%%@%%@%%##%%* .. ... . | 13 | 180 |
| .. . .. :*%*%%%%%@%%%%@@% ....... .. | 14 | 180 |
|.. .... .-:::--::------:: .+@@@* ....... | 57 | 180 |
|... .. ....::.:............ -#@@@#. . .. | 72 | 180 |
| .. . .. .. ................ :*@@@# ... .. | 73 | 180 |
| .. ....:............... -+@@@# .. | 73 | 180 |
| ...... ... .................. .##@@%# ..... .. | 74 | 180 |
| .... .......:............... #@@%%= .. .. | 75 | 180 |
|. ... . .... :::::::::::::::: *#@@%* | 38 | 180 |
|:.... .. ..@#**##**%**+**** ... ... | 14 | 180 |
|... . ... %**%%%%@%%##%#*# .. .. | 16 | 180 |
| . .. ....##*#%###*%%#%@## .....: | 14 | 180 |
Wi-Fi (WLAN 6) Microwave oven
Info: Wi-Fi idle state (no down- and uploading). A microwave oven is being used on a different floor.
data1_wi-fi_upload.log
|------------------------------------------------------------------------------------------------------------------------------|-----|-----|
|Frequency layout [GHz] |Ref. |Max. |
|2.4 2.41 2.42 2.43 2.44 2.45 2.46 2.47 2.48 2.49 2.5 2.51 2.52 |RPD |RPD |
|| | | | | | | | | | | | | |[pcs]|[pcs]|
|------------------------------------------------------------------------------------------------------------------------------|-----|-----|
|. .. ....:.--:-::::=+**ssss%%%%@ss%%++=:-----::..... .... | 65 | 250 |
|..... . ......:::--:::-+=+%%s*s%@*s%*%s%+++==---=-:.. ... ... | 58 | 250 |
|...... ...:-=:+--==--s+*@%*sss*s%%s*%s+==:-===-::... . .. | 56 | 250 |
| .. ..:--=--==--=++*%ss**ss*@**s+*==-:::-::...... .. ...... | 64 | 250 |
| . . ...:-===+-=:--+=*s**ss%%%%*%@@%**==+=-===::.. ......... | 55 | 250 |
|.. .. . ..:::--.:----+==s***ss%*s*s@s*+=--:--::-:... . ...... | 67 | 250 |
|....... ...::::---:--=++*@*%s%%s***++++==-::::::..... .. ...... | 63 | 250 |
|.. .. ...:-.::=====+sss%%%%%*s%%@s**s*+-:---.::.... .. .... | 52 | 250 |
|... ... ....:-+-+-+-=-=**s@%%%s%@s+%@@ss++---===--::.. .... | 56 | 250 |
|. ... ...::--====---:++*s%sss*ss%*s%@%%*+===+====... ... ..... | 63 | 250 |
| .. .. ...::-=====:--+*s%%%@%ss**s%@%%++----=--::... .... | 59 | 250 |
| ... ..:::---=----=*+*s+sss%s*%s*s@*===-----=::... .. .. . | 67 | 250 |
| ... .....::::--===++*+*****s*****@s+=-::-:-:::... ..... | 83 | 250 |
| .. ....--=++++++-+s*+@%ss***s%%s@%s*++==-==--:.. ... .. | 63 | 250 |
| .. .. ...::--==+=+++**+s@%sss%sssss*s+*==--===-:... . .... .. | 79 | 250 |
| ... ...:-=-=+====+*+s%s%%%%*%@s%sss*======--:-... ..... . | 60 | 250 |
| .. .. ...::==-----=+**+s%@ss******s**=+==-=--:-:.. ... .. . | 70 | 250 |
| . ....----=++===+*s%s@@s%%%sssss%+++==-===--... . .. | 78 | 250 |
| ..... .:::-=+===--:==+s@%%s**sss%%%s+==------:-:.. ..... .. | 72 | 250 |
|. ... ....::::::::---+s%*%s@%ss%s%%ss*-=:-:--:==:.... .. .. ... | 49 | 250 |
|... .. ...:---=:--==*+=**%ss**@s****+-+==---:.:... .. ... ... | 60 | 250 |
| .... . ...:-+===+=+-=*+*s**ss*ss%@%%%s+++==----::.. ... | 70 | 250 |
|. ...:===-==-==*=*s@ssssss%s%ss%**+==+=---:.. . . .... | 71 | 250 |
Wi-Fi (WLAN 6)
Info: uploading data through Wi-Fi.
data2_bluetooth_0.log
|------------------------------------------------------------------------------------------------------------------------------|-----|-----|
|Frequency layout [GHz] |Ref. |Max. |
|2.4 2.41 2.42 2.43 2.44 2.45 2.46 2.47 2.48 2.49 2.5 2.51 2.52 |RPD |RPD |
|| | | | | | | | | | | | | |[pcs]|[pcs]|
|------------------------------------------------------------------------------------------------------------------------------|-----|-----|
| .. . .. ...+=-**+*####*@##%#:-. .. .:.. | 17 | 180 |
|..--. .-:*%+#%@#%@@*++%+-=:- .. :. .. | 10 | 180 |
| ..... .....:=%%*#%@%###*++++*%+=:: ...... .......... | 19 | 180 |
|... . .. :-+*##%**++*%*#%##@#-:: . .. .. | 24 | 180 |
| .. ...-+=**++#*=**##*#**@=- .... .. .... .. | 21 | 180 |
|. ...=+=%#@%##**+#*++--+#.:. . . .. .. | 20 | 180 |
| .. . ... --.+*+#+=*+*=**#@+*+-=. . .. ... | 24 | 180 |
|. .... .. ..=-+%##@####%*#@%*#:-:: .... | 20 | 180 |
| .. ...:-:-***=*%=****+%%@-==. .. .. . | 24 | 180 |
| ... . .. :-=*#*#*#@@@%%##**=::. .... . | 25 | 180 |
|.. . ... =--+@%+*+*%%*++*%@#-*:. .. .. | 17 | 180 |
| .... . . .:-%#%@###***%%%#*+*:.:. . .. .. . . . .. . | 19 | 180 |
|... .. . .. : .. . .. ...:.%#*@@####*##*@#-:... . . . .. . .. | 19 | 180 |
| :..:: . . .. . .. :.::=.=.*#****%@%%@##@@:-.: .. . . ..:. | 18 | 180 |
| .:... . . .. . ..... :-.:@*####****++++#.... . . .. :. .... .. | 21 | 180 |
| . .. . ... . .. ...:..:+##%@@@**+*%#*#:.:. . ... . . .. ......... | 26 | 180 |
| .. : .. . . . .. .:.-:-%#%%@@%@##*+%*##+.:. . .. . . .. .. | 22 | 180 |
|.. . : . . . .. .. . ..:+#@@@%@##%%##+*+.::... .. . . . . ..: | 22 | 180 |
|. ..... . . . . . .::=******#*#@#%%%%%=-:.. . .. . . . . . | 27 | 180 |
|... .. . . . .. :.::+*++=**+=++++#@*-::-... .. . . .. .. .. ... | 23 | 180 |
| .. . . . . . :. . ..=#*+*%#*%#@@%%%%=.... . .. . .... ... | 26 | 180 |
| .. . .. :: . . ..:..:::%*+%%*@*=+=**%*-..: .. . .. .:-. ... | 18 | 180 |
| ... . .. . . :..:. . --*#@%#****#%%**+:.. . . . . . ...: .. | 28 | 180 |
Wi-Fi (WLAN 6)
Info: phone is trying to connect to turned off JBL (Bluetooth).
data3_bluetooth_1.log
|------------------------------------------------------------------------------------------------------------------------------|-----|-----|
|Frequency layout [GHz] |Ref. |Max. |
|2.4 2.41 2.42 2.43 2.44 2.45 2.46 2.47 2.48 2.49 2.5 2.51 2.52 |RPD |RPD |
|| | | | | | | | | | | | | |[pcs]|[pcs]|
|------------------------------------------------------------------------------------------------------------------------------|-----|-----|
|. :::----:::-:.... .. :++#*%%%*#**+*###*@@..- ....:-:-:+++-=-=+**=#+::..::. | 16 | 180 |
|:. .-=+=-::.:.... . .....-*#*%##@%#####@#%%+:. ..:::.--:..... ..::::::.. | 16 | 180 |
|..:. .:--==-==---.. .. ..:=@%@@#++##*+#*%*%+*+-. .:-=++*++--=---::::::..:. .. | 18 | 180 |
|..-=-:=*=--:-:.. . . .-=@@%%#++*##%*%*%@*%#:. ..::---::--::::==-==-..... .. | 18 | 180 |
|....:-----=-:::.. :--%+*++*+*+++*#+**+%@:: ..........:.::-:-::::::::... . | 26 | 180 |
|...::-:-:-:=-:... .. .=*##%*#*#@*#@+%=+#%#:: .::-:-----::...-:=-=.... | 20 | 180 |
| ..:::-::-:::::.. ......-+*+#+=+=+%%+@*+%###:. . .....-----::..:.....--::.... | 20 | 180 |
|.....::::----::.. . .::.*##+***%#**##%*#%@%-: ....:--:::.:::::::.::---:.. | 21 | 180 |
| ...::::::::..... .. .-+=%%%%%#%##%#%#@%*##+=- ..::::::.......:..:::...... | 29 | 180 |
|.................. ....::*#*####@##%%%%@%#%@:- ........................... | 38 | 180 |
|....:::::..::::-::: . ::.**%%%@%*%#%%%%#@%%#.. .. .......::::-::.:.... .. | 24 | 180 |
|......-=++**+*+::.. ... ...%@%#@%#*#@@###*+%@%:. . ..:=----:-:-:.:.:.... | 20 | 180 |
|.. .:-::--=----:.. ......#**##*#@*%@**%%+*#*.. ..::.:--=-==-:....... .. | 25 | 180 |
| ...---::.:...... .. ...%#*%**#+*#%##@@@%%@. .:::...:::..::-::::. . | 22 | 180 |
|..::----::--=-::::. . ...:.#++#*#+=#*+=+*#@*%#.. ...:.:::-:-----:=-.... | 21 | 180 |
| ...::::....:::.... ...-:%*##*%%#**%#**%#@@*:: ...::-.............. | 28 | 180 |
|..:......:.:.. ... .. ...++**#@#**=#*#%###*#:: . ....:::::..:....:..... | 29 | 180 |
| ...::.---::::.... ....+++*#*#%%*#@@%%**##:. ..........:.......:... | 30 | 180 |
| .....::--::+-::::: .. --%#**++-#*+*#%#%%*#@-: ..:-++=-:::..::---::. | 24 | 180 |
|. ..:-.::.:-:::.:. .....@%@%@%%@@*######+== . ...:::.:::.. ..:.:::.:.. .. | 21 | 180 |
| ...:::==:===-::. ..:.#+*%**##@%%#@@@#*%%:. .:....::..:::.::::::--.... | 17 | 180 |
|................... ......*++**++#*#***@***#%:.. ....:..::............. .. | 32 | 180 |
| .::...:::::-:..... .. .==#@%@##%##=+*++#****-- ......:................... .. | 35 | 180 |
Wi-Fi (WLAN 6)
Info: phone is playing music via JBL (Bluetooth).