smallembedded

Wireless serial debugger

Overview

Using the crystal-free ch340c serial port to ttl chip, it can be directly plugged into the USB female port when selecting the appropriate board thickness for proofing. USB takes power, and the onboard 5V to 3.3V step-down ldo~~~~ can provide about 200ma current. The transparent transmission module is jdy-40, the default baud rate is 9600, pull down the SET pin level, and use the AT command to modify the configuration. For the AT command, see the attached manual. The SET pin has been lead out and can be used to proof two identical PCBs. The microcontroller is directly connected. One piece, plug directly into the host computer, the default configuration can be used directly~~~~ After proofing and verification, it can be used normally. Note: The TX and RX pins are directly connected to the microcontroller, and crossover lines are connected inside the PCB.

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Design Files

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Update:2025-08-04 20:01:16

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