Hi all I have a infrared combat game that I want to expand it uses infrared sensors on a interrupt to decode the data (I use a interrupt because it receives data analyses to see if the shot was a hit or miss then sends a command over serial Bluetooth to another microcontroller to play sound this ensures it seems instant) I would love to add more sensors but I want to know which sensor was hit to determine scoring is there any way of doing this without having to tie each sensor into individual pins.
I looked at a i2c expander board but I believe this may slow it down on processing time.
Quick update I've ordered multiple sensors and an i2c expander board going to try linking the i2c input on an interrupt and then reading the sensor il see if this works.
Shandy:
A little disappointed nobody else has any input.
Maybe no-one reading this board over the past two days has done anything similar? This is actually quite likely, you know. There are a couple dozen frequent contributors around but the rest just comes and goes.
Other than that, you didn't have any actual questions.
Nonetheless your description doesn't sound like it will work. I2C is a communications protocol, and doesn't trigger events other than related to its own communication. But with the very limited info you have provided, that's all there can be said about it.
Received extra sensors i now have a nice stock of them however i have moved twice since receiving each time not being able to setup my kit so have not yet been able to play.
The concept i was going for is that i split an input from the arduino (an input with attached interrupt) to an i2c expander board so i now have lets say 4 sensors connected to the expander and that connected to a single arduino input.
When a shot is fired at any of the sensors it will trigger the interrupt on the arduino input pin that triggers the routine to decoding the shot packet and detecting from which sensor it recieved the signal from or at least that is the concept.
I suppose what i am trying to do is to multiplex multiple infrared sensors while still knowing which individual sensor the signal is from.
Which exact sensors?
Which exact I2C expander?
What's your application/project trying to achieve?
Why are you using an I2C expander?
And finally: how do you think your sensor (with an I2C interface) can trigger an interrupt in the first place?
Sensor TSOP4856
I2c expander from ebay
My code decodes infrared packets from a game using an interrupt to increase the speed (rounds per minute) as described above, I want to have multiple sensors still triggering an interrupt but don't want to link them in parallel as I want to know which one was triggered.
I have not yet tried to use an expander was hypothetical and after pondering on your comment did a little research to now find out that won't work.