Having different key codes along with using different frequency ranges, ensures that two remote controllers of different devices would not have interference.
Arduino camera infrared code#
Each remote controller has its own set of key codes while it’s possible that two controllers share the same code for different purposes.
The key code is a number normally presented as hexadecimal. In order to program Arduino to do something when you press a key on the remote, you should first have the code corresponding to that key. You can find a brief history of IR protocols on Wikipedia under Consumer IR title. One of the most known standard protocols is from NEC. The way a code should be modulated (modeled) as a signal is defined in different standard and each sensor manufacturer normally tries to produce a product compatible with them so that it could be used in different devices. Both sender and receiver agreed on a set of codes so that receiver knows what to do based on each code. On/Off, Volume Up, etc.) and sends it for a receiver (in this case your TV). When you press a button on your TV remote control, it generates a signal corresponding to the button code (e.g. Electric signals can be converted back to the actual data/code that sender has sent. IR communication protocolĮach signal represents a specific code.
The IR signals are mainly used for transmitting commands over the air on short distances (typically few meters) like what you’ve already worked with on TV remote controls or other similar electronic devices. An IR sensor is an electronic instrument that scans IR signals in specific frequency ranges defined by standards and converts them to electric signals on its output pin (typically called signal pin).
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