Hi, I am using a third party sensor (UVTron Flame Sensor) that outputs a number of pulses per second. It's pulses of 100 milliseconds and the value from the sensor during that time is 1. The rest of the time it's 0. So it's basically like a touch sensor.

I have to do different things depending on how many pulses there are per second (there can be 0 to 10 depending on the flame and distance to it). For this, I have to count the number of "tushes" the sensor sends. I wrote some test code, but the problem is in the function. The compiler says that:



numPulse is the name of the function that counts the number of pulses per second. Just in case, the code is this:



I hope you guys can help me. Also, I would think that there would be a function to do this, but I couldn't find it, so if anyone knows it, please tell me.

Thank you.

So the change you need to make it work is move the function declaration of numPulses to be above void main.
The computer hasn't heard of the function numPulses by the time it sees you use it for the first time.

It works! Thank you so much!
So, is there a function to do this automatically? (a push counter, or something similar)

So there would be a way to do it using built in functions. If you declared it as a single wire encoder in the motor and sensor setup and every second you check sensorValue[pulses] and then set it to be 0. This run a lot faster because the incrementing is done on a hardware level(could handle thousands of pulses per second). In your case it is probably not needed and would unintuitive as to why it works without a proper understanding of how encoders work. Your solution is the simplest and should never really have problems with 100 ms pulses.