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One of the most common needs in electronic projects and industrial applications is ensuring communication between different devices. However, not every device uses the same communication standard. This is where serial converter boards come into play.
What Is Serial Communication?
Serial communication is the method of transmitting data bit by bit, over a single line.
- Requires fewer cables
- Reliable communication over long distances
- Simple and low-cost hardware
This communication can be established with different protocols: the most common ones are RS232, RS485, and TTL.
What Is RS232?
- One of the oldest serial communication standards between computers and devices.
- Operates at ±12V levels.
- Commonly used with a DB9 connector.
- Advantage: Simple and widespread.
- Disadvantage: Short distance (up to about 15 meters).
Applications: Legacy computer peripherals, industrial machines, microcontroller – PC connections.
What Is RS485?
- Developed for long-distance and multi-device communication.
- Uses differential signaling → allows communication up to 1000 meters.
- Up to 32 devices can communicate on the same line.
- Widely used in industrial environments.
Applications: PLC and automation systems, Modbus protocol, sensor networks, building automation.
What Is TTL?
- Represents “Transistor-Transistor Logic” levels.
- Operates at 0V (LOW) and 5V / 3.3V (HIGH).
- Directly used by microcontrollers (Arduino, STM32, ESP32).
- However, it cannot be directly connected to a PC → a converter is required.
Applications: Arduino and other development boards, sensor modules, small circuits based on serial communication.
Why Are Serial Converter Boards Necessary?
Since not every device operates on the same standard, a converter board is required.
- If a computer has RS232 output but the device uses RS485 → an RS232-RS485 converter is needed.
- If Arduino has TTL output but needs to connect to a PC via USB → a USB-TTL converter is needed.
Serial Converter Boards Available at Motorobit
- TTL-RS485 Serial Converter Board – MAX485
- USB – TTL Converter Modules
- RS232 – RS485 Converters
With these products, you can easily connect your different devices and achieve safe and fast communication.
Conclusion
Serial converter boards serve as a bridge between different communication standards. In industry, automation, and hobby projects, choosing the right converter is crucial for ensuring seamless communication between devices.
Explore all serial converter boards here: Motorobit Serial Converters
