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Serial Ports Deep Dive: Custom Frames for Multi-Device Communication

This tutorial explains UART asynchronous serial communication, frame structure, parity check, baud rate concepts and data transmission workflow.

ruilixin6

Published August 03, 2026

Serial Ports Deep Dive: Custom Frames for Multi-Device Communication

Project description

【Preliminary Note】The original hardware example in this article was written based on the RP2040. The actual hardware used in this hands-on demonstration features the W55RP20 as the main controller chip. The circuit logic and UF2 flashing operation principles are universally applicable, with only the main controller model differing. The original chip model mentioned in the circuit descriptions below is provided for reference purposes only. Tweet 1. Basic Concepts Consider the following application scenarios: The receiver needs to receive data of variable length The sender will send different…

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