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How many devices can be on UART?
The UART protocol typically allows for only two devices to be connected to each other. There is no easy way of connecting multiple UART devices to a single interface.
What devices use UART?
Complex peripheral devices such as GPS modules, LCD displays, and XBee radios typically use Universal Asynchronous Receiver Transmitter (UART) ports (often simply called serial ports) to communicate. The UART is a generic interface for exchanging raw data with a peripheral device.
Is RS-232 serial or parallel?
The current version of the standard is TIA-232-F Interface Between Data Terminal Equipment and Data Circuit-Terminating Equipment Employing Serial Binary Data Interchange, issued in 1997. The RS-232 standard had been commonly used in computer serial ports and is still widely used in industrial communication devices.
How does a UART communicate with multiple devices?
The industry standard way of making a UART able to communicate with multiple devices is through converting it to a standard bus system, such as EIA-422 or EIA-485 (AKA RS-422/RS-485). A half-duplex multi-drop EIA-485 is probably the simplest to arrange, and there are breakout boards for the Arduino that will convert UART to EIA-485.
Can a MCU talk to more than one UART?
Likewise, the process is duplicated when the MCU wants to talk to device 2. The above approach works well if all UART channels are operating in a master/ slave configuration—the peripheral device will only send data when requested by the MCU acting as the master. So, what if the system needs a combination of both master and slave devices?
How can I transfer data from one UART to another?
Use edge interrupts or direct an input capture signal onto the inactive UART receive pin with the flexible I/O pin-mapping feature. If a device starts an asynchronous data transfer, the control program serves an interrupt and immediately switches the hardware UART module to the appropriate pins to receive this data.
How does serial communication between multiple devices work?
Serial communication between multiple devices (or Arduinos) What I know from my search on the internet, for both SPI and I2C protocols, communication between multiple devices needs a master, which initiates the communication, and slaves, which respond to the master’s request. Basically slaves can’t initiate a transfer.