I found the following answer on here (in the comments) and on the Raspberry Pi Forums here, but I am sharing it to be of use to anyone who might stumble upon my question above.
First, run the command sudo rfkill list all and you should get something like this:
0: phy0: Wireless Lan
Soft Blocked: no
Hard Blocked: no
Then, run the command sudo rfkill ...
The Flask framework is fine, your code has all the right logic and procedures as far as I can tell. But the structure (architecture) and control flow is not optimized for quick response or for multiple connections.
The problem is that all the control logic (with hardware interactions) happens during the request/response processing. This is fine for a ...
Check vcgencmd get_camera result.
It will return how many cameras are supported and detected.
Normally you will get "supported=1 detected=1".
If you get "detected=0" then camera is not detected : double check your connection, ribbon cable integrity and orientation, or consider that a picamera can fry from times to times.
I never met "supported=0", but ...
I share my updated version of the script for Raspbian-buster-lite guest on Ubuntu host.
QEMU=$(command -v qemu-system-arm)
I ran into the same issue, see Java 11 not working
There doesn't seem to be a Java version for older Pi's and the zero as they use an ARM6 processor, while the newer boards have a 7 or 8 and those are completly different processors.
I just installed Buster on my old Pi1 B+ and ran into the same problem.
sudo apt-get install default-jdk
the JavaVM didn't run.
I removed it and installed
sudo apt-get install java-8-jdk
now it starts.
I did some more research and did manage to get the MEMS mic working.
Apparently the guide was updated after I did setup my RaspberryPi using the guide which Johnny789 did point out in a comment.
This page (Raspberry Pi Wiring & Test) was last updated on Nov ...
What went wrong?
The most likely reason is that the 3.3V converter you used for 12V sensing via GPIO got powered while the SoC was still down. RPi doesn't start immediately once you feed it with 5v, it takes tens of milliseconds to start which is an eternity in electronics' time.
As a result, you applied 3.3V to a pin of an unpowered SoC, which you shouldn'...