ESP32 with MAX485 module communicating to a Pacifier USB RS485 adapter using ESP IDF скачать в хорошем качестве

ESP32 with MAX485 module communicating to a Pacifier USB RS485 adapter using ESP IDF

This setup shows how an ESP32 communicates over RS-485 using a MAX485 transceiver and a Pacifier USB-RS485 adapter. The ESP32 uses 3.3V logic, while the MAX485 is powered with 5V so it can drive the RS-485 A/B differential lines correctly. The MAX485 converts the ESP32’s TX/RX signals into RS-485 signals that the USB-RS485 adapter can read on a PC. On the software side, the ESP32 runs ESP-IDF firmware using UART in RS-485 half-duplex mode. It configures the baud rate, TX/RX pins, and then sends strings through the MAX485. With this setup, the ESP32 can transmit data—like sensor readings or debug messages—over RS-485 to a computer. The Pacifier USB-RS485 adapter shows the incoming data on serial terminals such as Tera Term or PuTTY. This method is commonly used for stable, long-distance communication in industrial systems.