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How does a serial Library handle sending and receiving information?
The hardware or software serial libraries handle sending and receiving information. This information often consists of groups of variables that need to be sent together. For the information to be interpreted correctly, the receiving side needs to recognize where each message begins and ends.
Why do you need a serial bus for serial communication?
Serial communication is designed to allow just two devices to communicate across one serial bus. If more than one device is trying to transmit on the same serial line you could run into bus-contention. Dun dun dun…. For example, if you’re connecting a GPS module up to your Arduino, you may just wire that module’s TX line up the Arduino’s RX line.
Do you have to call the serial.begin ( ) function?
Your sketch must call the Serial.begin () function before it can use serial input or output. The function takes a single parameter: the desired communication speed. You must use the same speed for the sending side and the receiving side, or you will see gobbledygook (or nothing at all) on the screen.
How does serial communication work on an Arduino?
The Arduino serial libraries insulate you from most of the hardware complexity, but it is helpful for you to understand the basics, especially if you need to troubleshoot any difficulties with serial communications in your projects. Serial hardware sends and receives data as electrical pulses that represent sequential bits.
How are serial bits represented in an Arduino?
Serial hardware sends and receives data as electrical pulses that represent sequential bits. The zeros and ones that carry the information that makes up a byte can be represented in various ways. The scheme used by Arduino is 0 volts to represent a bit value of 0, and 5 volts (or 3.3 volts) to represent a bit value of 1.
Why are dates stored as serial numbers in Excel?
Excel stores dates as sequential serial numbers so that they can be used in calculations. By default, January 1, 1900 is serial number 1, and January 1, 2010 is serial number 40179 because it is 40,178 days after January 1, 1900. If your results appear as serial numbers, select the cells in question and continue with the following steps: