RPI

I want to install the JDK 16 on a RPi 3B and I downloaded the Linux ARM 64 Compressed Archive from the Oracle site. Every time I run the command to check the version of java I get the same error: bash: ./java: cannot execute binary file: Exec format error

I already tried to untar it again and download the archive from zero, but I get the same error every time. Considering the RPi 3B not able to support the JDK16 for some reason, I downloaded and installed the Kit on a RPi 4 too, but the result is always the same. I used the checksum to make sure the downloaded archive was intact and it was.

Am I downloading the wrong package or have I missed anything important?

I'm trying to set up my environment to use Yocto's generated SDK to compile my out-of-tree module, but for some reason, I'm getting an error.

cp: cannot stat 'arch/arm/kernel/module.lds': No such file or directory

I'm using Poky distribution and meta-raspberrypi which is needed because I'm using the RPI ZeroW board. Apart from this everything works fine. I'm able to compile the entire image and load it on the board.

Here is the line I've added to local.conf

TOOLCHAIN_TARGET_TASK_append = " kernel-devsrc"

as I've found in the documentation.

Also below you can find the whole log from the compilation.

I am running a main python program on a Windows PC that is hooked to equipment that cannot be ran on an Raspberry pi. At a certain point in the main program, I want to call/execute a Rpi program to run. I need the GPIO pins from the Rpi to turn on a relay/s. Is there a way to wirelessly(or serially) open and run the program on the raspberry pi from the main program already running on the Windows PC?

Maybe I am not thinking of something, is there an easier and just as cheap solution to turn on a relay from the Windows PC program?

Any points in the right direction would be greatly appreciated.

I'm trying to setup a python camera app that streams to a browser and am using bottle. My javascript in the index.html is this:

I’m doing a home project with a raspi and a rain sensor.

Basically, with cronjobs, i run isitraining.py every 30 min.

If it is raining, i want it to increment a specific variable from another module (rains.water)

If it stops raining, i want it to decrease the same variable.

here are my codes:

rains.py

What I try to do: I want to write a Python program running on an RPI which communicates to a software called QLab4 via OSC. It should display the received workspace data (JSON format) in a table, while the user is able to select a cue from the table and fire it using a key press.

So far I got two scripts (just proof of concept stage), but I struggle to combine them into one program. Any hints to how to do it would be greatly appreciated.

Script 1: Starts OSC client & server and sends and receives OSC to/from QLAB. At the moment it just prints out the JSON (workspace) and the selected cue.

I'm working on a project in Python that uses two or more serial ports to manage some devices from my RPi. When ports are open in the same file and I send commands to different instances of serial.Serial object everything works fine. This is an example:

I am a software engineer working on a microcontroller system for a side project. The microcontroller I am using is the SparkFun ProMicro (based on the RP2040 board). I am trying to flash the board so that I can write data to the onboard flash memory.

All of the tutorials I have found online suggest starting in boot mode, dragging and dropping the UF2 file, and done!

When I do this, the microcontroller ejects from my computer. Is that meant to happen? It just reboots then doesn't reboot in bootloader?

Once I got MicroPython installed I moved on to writing and flashing code to the board.

I am using the Thonny IDE which identified the correct board (albeit the PICO), then saved the following file as main.py (taken from RPI foundation). It prints toggle, and I believe the output shows that it is being printed from the board, but the light on the board isn't blinking. (code and output below)

I considered that the pinout could be different from this board and the PICO, but some research shows they both use Pin 25 for the LED control.

All this leads me to believe I am on the right path, but I think I am missing something that is taken for granted in the tutorials. My end goal is to write arbitrary text data to flash storage, but I understand it can only take about 8000-10,000 writes before it becomes unreliable, so I want to test that I can write working code before I use some of those.

Is there something I am missing, or am I not thinking about this in the right way?

I want to delete some files every day at 6am. I was thinking about using crontab to schedule this task with something like