Raspberry Pi Forum - Recent Threads

Trying the Pi Pico RX SDR Project

scottiebabe — Thu, 09 Apr 2026 14:17:27 GMT

The element14 community (shabaz) pointed me to a very neat SDR project using a RPI Pico.

I have a RPI Pico and lots of generic and jellybean electronic components.

So, I will have a go at building a copy of the open source project.

All of the projects schematics and documentation are available here:

https://101-things.readthedocs.io/en/latest/radio_receiver.html

I don’t have all the exact components used in the project.

I made the following substitutions with similar components I had on hand

The frontend low rdson analog multiplexer was replaced with a 74HC066 quad analog switch (plus a one hot decoder).

I also lowered the gain of the op-amp difference amplifiers.

On power up, the picorx software defaults to an LO frequency of 1.4085 MHz.

I used my signal generator to apply a 150 mVpp carrier with a frequency that sweeps from 10 kHz below the pico’s LO to 10 kHz above the pico’s LO.

I get wonderful sinewaves on the output I/Q channels:

The quadrature detector has significantly more bandwidth than I expected.

You will notice that for frequencies above the local oscillator the Q signal leads the I signal (and vice versa for frequencies below the LO).

The QSD’s response within 1 kHz of the LO is being partially rejected by the AC-coupled difference amplifiers.

The amplitude response of the I/Q channels is not very well matched (I will have to think about that for a bit)

More to experiment with, but impressive results for the simplicity of the project.

RPI Pico2 SDR - First Attempt

scottiebabe — Fri, 03 Apr 2026 13:52:11 GMT

Have been experimenting with implementing an SDR on a RPI Pico 2.

I put together a bare bones SDR for narrowband FM

Diagram created with https://app.diagrams.net/ Source: (remove the .txt extension)/cfs-file/__key/communityserver-discussions-components-files/91/pico2sdr.drawio.txt

The input is IF is oversampled, frequency translated to baseband, filtered, and then decimated by a factor of 3. A polar discriminator demodulates the narrow FM signal and is low-pass filtered and output to an I2S DAC.

As a first test I am applying a narrowband FM signal directly to the ADC input of the pico2

The I2S DAC I used has a class-d BTL output. I had to add an LC filter to the output for the scope to display the audio output and not the class-d pulse train.

A few different input signals and demodulated output shown on my o-scope

When the input is below 10 mVpp the SDR starts to struggle.

The output amplitude is a function of the frequency deviation, not the input amplitude.

Pretty cool.

I wrote a hands-on Raspberry Pi Pico 2 project book free review copies for embedded developers

micheal.embedded — Wed, 04 Mar 2026 15:01:44 GMT

Hi everyone,
I’m Michael Bell — I write embedded systems books for beginners and professionals.

I recently released:

Embedded Systems with Raspberry Pi Pico 2 and RP2350: Projects and Deep Dives

The book is built around the Raspberry Pi Pico 2 powered by the RP2350.

It’s project-based and practical starting from GPIO fundamentals and moving through timers, interrupts, communication interfaces, and full embedded system builds. The goal was to make it hands-on and realistic, not just theoretical.

I’m currently looking for honest feedback from embedded developers and hobbyists.

If you're interested, I can provide a free Kindle copy in exchange for an honest review on Amazon. No pressure I genuinely just want constructive feedback from people who actually build things.

You can explore the example code and projects here:
📌 https://github.com/michael-embedded/rp2350-edge-ai-lab

And here’s the Amazon page with full details:
📌 https://www.amazon.com/dp/B0G62PXWTP

Many projects include step-by-step explanations, debugging notes, and design reasoning so you can understand not just how things work but why.

If you’re interested, just comment or message me.

Thanks for supporting practical embedded learning.

— Michael

Ubuntu Server for RPi

Devcom5155 — Thu, 26 Feb 2026 19:34:37 GMT

I am trying to set up an Ubuntu Server on a Pi3 for a home file server.

Every time I install or update, something fails, generally the source becomes or is unavailable.

This then breaks my Server install and I have to reinstall, resulting in another 1.3GB download.

Is there a way of getting the iso downloaded to be reused for each reinstall?

Beginner looking for help building cyber deck

DoItForRodagia212 — Tue, 17 Feb 2026 19:16:26 GMT

I’m new to making cyberdecks. Right now I have a Raspberry Pi 4, and I was wondering what are some parts I could get right now that wouldn’t interfere with later additions? I’m looking to make a basic pentesting/music playing deck and eventually add a case (whether it’s prebuilt or 3d printed), screen, and other stuff that could still fit into a bag. Also I wanna skateboard with this thing, so durable parts that can handle some bumps would be nice. Any help would be greatly appreciated thank you! :))

hardware interrupts - can you

Nick Hanson — Wed, 11 Feb 2026 14:01:37 GMT

Hi,

i was wondering if it is possible to set an i/o port pin to generate a software interrupt. i am new on the Pi and have done this on the arduino, any pointers would be much appreciated.

Raspberry Pi 5 4GB

Alpha2026 — Thu, 29 Jan 2026 14:01:30 GMT

Hello,

I have a requirement of 400 devices, please guide me to any official distributor.

Looking for ideas: cheap but awesome project ideas

micheal.embedded — Sun, 11 Jan 2026 15:12:33 GMT

Hi everyone,

I’m currently in my final year at university and I’m required to design and build a project for my final-year submission. I’m really excited about this because I want to create something meaningful and technically solid.

The challenge I’m facing is budget I can’t afford expensive components or complex lab equipment. Because of that, I’m looking for ideas on how to build something that is low-cost but still innovative and impressive from an engineering point of view.

"x86" on arm, finally? How fex-ing!

stanto — Sat, 03 Jan 2026 00:22:19 GMT

www.youtube.com/watch

Won't be long until this seems into a lot of single board computers among other devices.

I wrote a handson Raspberry Pi Pico 2 project book free review copies for embedded devs

micheal.embedded — Mon, 29 Dec 2025 12:24:46 GMT

Hi everyone, I’m Michael Bell I write embedded systems books for beginners and professionals.
I just released “Embedded Systems with Raspberry Pi Pico 2 and RP2350: Projects and Deep Dives”.
This is a project-based book that takes you from blinking LEDs to building real embedded systems using the RP2350, GPIO, timers, interrupts, and communication interfaces.
I’m looking for honest feedback from developers and hobbyists.
If you’re interested, I can send you a free Kindle copy in exchange for an honest review on Amazon. No pressure I just want to make sure the book is practical and useful.
You can also check out the example code and projects on GitHub here:
📌 github.com/.../pico-embedded-book
And here’s the Amazon page to see the book details:
📌 www.amazon.com/.../B0G62PXWTP
Many of the projects include detailed walk-throughs and debugging notes so you can learn how and why things work.
Thanks for helping me make embedded learning better!

Hey Phil can I get your autograph?

colporteur — Tue, 16 Dec 2025 19:29:41 GMT

Who knew E14 would make the magazine.

https://magazine.raspberrypi.com/articles/meet-phil-hutchinson-element14-community-organiser

recommendation for smallest Pi for temp monitor

curious63 — Tue, 09 Dec 2025 05:46:36 GMT

new member as of today (12/08/25) and I'm a rookie to boot. I need some help with a project I wold like to do. I would like to use a Pi nano, or what ever is appropriate, to measure temperature from 3 temp sensors. I plan to put 1 sensor at ground level, 1 sensor at 24'" above ground level and a third sensor at about 60" above ground level. I would like to have a very small display showing all 3 temperatures at the same time. So my question is this: Is a Pi nano appropriate for this? and if not, what would be the best raspberry pi option for the lowest power consumption to accomplish this?

Any help would be appreciated.

Issue setting up Wi-Fi on Raspberry Pi Model B+ at University

Vinn111 — Sat, 22 Nov 2025 20:24:22 GMT

Hello everyone,

I recently got a Raspberry Pi Model B+ with a Vilros Wi-Fi adapter and wireless keyboard, but I’m having trouble connecting it to eduroam. On boot, the network shows greyed-out text with a prohibition symbol and two grey boxes. The Pi connects to guest Wi-Fi without any issues, so I’m not sure what the problem is.
If I can’t get it working, I may need an alternative way to access reliable Wi-Fi, but my budget is limited. Any advice would be appreciated.

Thank you.

A Raspberry Pi Case to solve

colporteur — Fri, 07 Nov 2025 05:24:23 GMT

How do you overcome the limited access to the SD card on Raspberry Pi case that is physically mounted to a surface?

Lately, I've deployed a number of Raspberry Pi in the company network. They are ideal for network UPS monitoring [NUT] servers and ad block pi-hole servers.

A power failure last Friday corrupted a memory card in one of the Pi's. Restoring the OS image got the Pi working. The pi are mounted to a wall using the mounting holes (Ellipse 1). In order to get at the memory card (Ellipse 2) I have had to unmount the case from the wall. My fingers are just not small enough and I haven't discovered a tool that can grip the card in such a small space with the case mounted to a surface.

The picture is of a new case I am trying. It suffers from the same problem as others. On a different case I've taken to cutting the plastic around the SD card to enlarge the hole. It looks like crap but works. Recently I've taken to extending a handle on the SD card with cellophane tape (Ellipse 3). Removing the SD card without having to unmount the case is possible by pulling on the tape handle. Getting the SD card back into the unit is a bit of a challenge.

I've struggled with SD card insertion on a Pi3B+ case I had mounted to my workspace. It took a pair of needle nose players and some wrist flexing to extract cards.

Please share your insight if you think it can help solve the case.

Raspberrypi B4 troubleshooting

Markoon96 — Tue, 28 Oct 2025 07:11:11 GMT

Need help troubleshooting my raspberrypi B4 and flashing micro SD card with Operating software on an Azus windows 10 desktop

Question about piface digital 2

acca — Mon, 29 Sep 2025 11:13:08 GMT

Hello

I have a piface digital 2, i'd like to know the max rated voltage for the relays

It is written 250VAC 10A on the relays body but 20V 5A on the element 14 product page.

Could someone help me please ?

Pi Desktop kit transforms your Raspberry Pi into a stylish

doudy — Sat, 30 Aug 2025 12:02:19 GMT

Hello,
I have a Desktop Transformer Kit for PI3 + SSD.
Purchased in 2018 from McHobby.
I would like to know if it is possible to use the "Pi Desktop" board and case with a Raspberry Pi 4 - Model B - 4 GB?

Thanks

7” Screen Nits/Lumens?

Cpk — Sun, 17 Aug 2025 20:18:16 GMT

D/5624-KIT-I.C

A family friend gave this display to me. I’m working on a project to put a screen in my car and route it through the factory harness and aftermarket system I have. All I am wondering is if this 7” touchscreen is bright enough to be seen during the day? Specific specs would help most!

Python Libraries

g_hash — Thu, 07 Aug 2025 16:51:13 GMT

Are there any available libraries that could be used to configure the I/O including pad properties such as Schmitt-trigger filtering and drive strength? Will be coding in Python

solved: Visual Studio Pico extension release "today" fails to blink the right led for a pico2_w

Jan Cumps — Fri, 25 Jul 2025 19:22:35 GMT

Raspberry pushed a new version of the Pico extension for Visual Studio.

This one doesn't seem to deal correctly with the board selection in the extension:

I deleted the build directory. Cleaned CMake. Configured CMake, Compiled. And it still thinks it's a non -w pico2 board with a LED on pin 25.

Anyone else tried it with a pico_w or a pico2_w?

edit 27-jul-2025

Solved. It was an error in my project's makefile. I had commented the board selection - expecting that the extension would manage it.
That caused that the extension couldn't switch the board. Removing the comment character fixed the situation:

Looking for price for Raspberry Pi4

techtreno — Thu, 26 Jun 2025 06:57:53 GMT

Please help with commercial for

RASPBERRY PI 4 8GB RAM WITH ACCESSORIES , Please give without and without

Regards

Santosh

Do you have a CMake script for Pico2 RISC that doesn't need the VSCode Pico Extension?

Jan Cumps — Mon, 23 Jun 2025 19:32:54 GMT

I can create new Pico 2 RISCV projects with the Raspberry Pico extension for VSCode.
Wondering if you have CMake CMakeLists.txt example that doesn't rely on the extension.
Dependencies on CMake, Ninja, SDK location, GCC toolchain are ok.

why? For projects I publish on github, I prefer that they are independent of IDE and OS

edit: solved - Use the Pico RP2350 in RISC-V mode without Pico VSCode Extension: build

have you debugged a Pico2 RISC program with a PICOPROBE / DEBUGPROBE?

Jan Cumps — Thu, 19 Jun 2025 22:57:50 GMT

Have you been able to debug a C Pico2 RISC project with a PicoProbe / DebugProbe?

edit: solution: RE: have you debugged a Pico2 RISC program with a PICOPROBE / DEBUGPROBE?

I use VSCode and the Raspberry Pico Extension - all up to date as of today - to create a Pico2 project.
If that project is using Pico2 ARM cores, the debugger manages to program the RP2350 and debug it.
If I switch that project to RISC (or create a fresh Pico2 RISC project), the build succeeds, but debugging doesn't.

Error:

[2025-06-19T22:57:07.909Z] SERVER CONSOLE DEBUG: onBackendConnect: gdb-server session connected. You can switch to "DEBUG CONSOLE" to see GDB interactions.
"C:\\Users\\jancu/.pico-sdk/openocd/0.12.0+dev/openocd.exe" -c "gdb_port 50000" -c "tcl_port 50001" -c "telnet_port 50002" -s "C:\\Users\\jancu/.pico-sdk/openocd/0.12.0+dev/scripts" -f "c:/Users/jancu/.vscode/extensions/marus25.cortex-debug-1.12.1/support/openocd-helpers.tcl" -f interface/cmsis-dap.cfg -f target/rp2350-riscv.cfg -c "adapter speed 5000"
Open On-Chip Debugger 0.12.0+dev-g75bc439-dirty (2024-08-08-15:04)
Licensed under GNU GPL v2
For bug reports, read
openocd.org/.../bugs.html
CDLiveWatchSetup
Info : Hardware thread awareness created
Info : Hardware thread awareness created
adapter speed: 5000 kHz
Info : Listening on port 50001 for tcl connections
Info : Listening on port 50002 for telnet connections
Info : Using CMSIS-DAPv2 interface with VID:PID=0x2e8a:0x000c, serial=4150323038323713
Info : CMSIS-DAP: SWD supported
Info : CMSIS-DAP: Atomic commands supported
Info : CMSIS-DAP: Test domain timer supported
Info : CMSIS-DAP: FW Version = 2.0.0
Info : CMSIS-DAP: Interface Initialised (SWD)
Info : SWCLK/TCK = 0 SWDIO/TMS = 0 TDI = 0 TDO = 0 nTRST = 0 nRESET = 0
Info : CMSIS-DAP: Interface ready
Info : clock speed 5000 kHz
Info : SWD DPIDR 0x4c013477
Info : [rp2350.dap.core0] datacount=1 progbufsize=2
Info : [rp2350.dap.core0] unavailable.
Error: [rp2350.dap.core0] Examination failed
Warn : target rp2350.dap.core0 examination failed
Info : [rp2350.dap.core1] datacount=1 progbufsize=2
Info : [rp2350.dap.core1] unavailable.
Error: [rp2350.dap.core1] Examination failed
Warn : target rp2350.dap.core1 examination failed
Info : starting gdb server for rp2350.dap.core0 on 50000
Info : Listening on port 50000 for gdb connections
Info : accepting 'gdb' connection on tcp/50000
Error: Target not examined yet
Error executing event gdb-attach on target rp2350.dap.core0:

Error: Target not examined yet
Error: Function FUNC_FLASH_EXIT_XIP not found in RP2xxx ROM.
Error: auto_probe failed
Error: Connect failed. Consider setting up a gdb-attach event for the target to prepare target for GDB connect, or use 'gdb_memory_map disable'.
Error: attempted 'gdb' connection rejected
[2025-06-19T22:57:10.180Z] SERVER CONSOLE DEBUG: onBackendConnect: gdb-server session closed
GDB server session ended. This terminal will be reused, waiting for next session to start...

bought a set of Pico 2

Jan Cumps — Tue, 17 Jun 2025 15:39:09 GMT

I purchased 2 Raspberry Pico 2W. To try the RISCs.

The 3 things that I want to get going first:

✅ debug session on 1 RISC with PicoProbe
✅ FreeRTOS SMP running on the 2 RISCS
✅ use 3 PIOs (I used the 3rd pio with the stepper motor design I made earlier)

customer action photo: Pico 2W on a pico-eurocard

customer action photo: Pico 2W runs 10 stepper motors on 3 PIOs

Programming MAX96717F and MAX96714F

bugtech — Fri, 13 Jun 2025 08:28:55 GMT

HI,

I am using SerDes MAX96717F Ser and MAX96714F Des (MAXIM INTEGRATED) along with raspberry pi 4 to get the output of Raspi Camera on RPi4.

1: The pipeline has been generated using the GMSL gui through script generation.

2: Once cpp file is loaded, i am able to get the display at the Rpi4.

The issue is whenever i power cycle the boards. I need to load the script again to get the output.

How can i program it for once and use it even after power cycle?

Any leads?