Does the txd pin on your module connect to the rxd or txd pin on my microcontroller?

TxD works with 5V TX pin on Arduino (e.g. pin 18). Didn’t work with 3.3V pin on Raspberry Pi 4. Watch out for GND and VCC cables. Their colors are mixed up.

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ATNSINC 5Pack TTL to RS485 Adapter Module, 485 to TTL 3.3V/5.0V Signals Serial Port Power Supply Converter with Indicator Lights

Product ID: 490274139

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⚡DC 3.0V ~ 30V

📡Baud rate 110 ~ 256000bps

🌡️-40℃ to +85℃

Description

🔌 Connect with Confidence!

COMPLETE PACKAGE - Includes 5 modules and a 2.54 white socket with 4P lines for immediate deployment.
ROBUST PROTECTION - Built-in lightning protection and anti-jamming features ensure uninterrupted performance.
UNMATCHED VERSATILITY - Compatible with both 3.3V and 5.0V signals for seamless integration.
LONG DISTANCE CHAMPION - Achieve reliable communication over distances up to 800 meters with minimal signal loss.
VISUAL MONITORING MADE EASY - TXD & RXD indicator lights provide real-time status updates for hassle-free monitoring.

The 5Pack TTL to RS485 Adapter Module is a high-performance converter designed for seamless communication between TTL and RS485 signals. With an operating voltage range of DC 3.0V to 30V and a baud rate of 110 to 256000bps, it supports a wide array of applications. Its robust design features lightning protection and anti-jamming capabilities, making it ideal for both long-distance and indoor use. The package includes five modules and a socket for easy installation.

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