ledb | Lightweight embedded database

I'm writing a code where I will be able to turn on 4 arduino leds via wifi, the issue I have is that it only turn on led #1 when I'm trying to turn on led #2, I've checked the code and it should be correct as to how its written but I can't find the reason as to why it doesn't work

I've tried changing the conditions on the ifs to see if it detects them, say I change in the code that it should find pin 5 when it should be pin 4, if I try to turn on pin #4 with that condition, it will still turn on pin #1

Note: the if and else if I've changed how they're written and everything but the result is still the same, led #1 is the only one that will turn on

Is it possible to ensure a certain template parameter (or combination of template parameters) is used - at most - once? Would it be possible to track the number of times it's used, and throw a static_assert error if it was used more than once?

As an example - let's say I wanted to create a static, template-based GPIO class:

I have a function which is basically a Whack-A-Mole game using LEDs and Push Buttons. LED-A lights up, and the user has to push BTN-A to turn it off... and we move on to the next LED/BTN combo.

My circuitry works and i can turn each LED on/off individually and detect each button push as well. However, once in my game loop (see below), I see some odd behavior.

My code looks like this:

In this sketch the Arduino connects to an Android app and receive data through a bluetooth connection. It works as intended, but the sketch is getting stuck in the while loop if the bluetooth is not connected and the sketch is not receiving serial data. It works just fine if the bluetooth is connected, and it is receiving serial data, but I can't figure out how to make the sketch break the while loop so it can read the button state. I need the sketch to break the while loop to read the button state. Anybody have any ideas? The data received looks like these examples: L178: R215: L-125: R-115: There is always either an L or R followed by a - sign or no minus sign followed by numbers -255 to 255 followed always by a :

I am working on a small college project using Raspberry Pi. Basically, the project is to provide an html interface to control a sensor attached to the Pi. I wrote a very simple Python code attached with a very basic html code also. Everything is done in this path /var/www/NewTest. However everytime I try to access it throws a 500 internal error. I tried simple "Hello World" examples that worked with me and tried to do this example the same way but didn't work.

led.py