Industrial Modbus RTU 8 ch Relay Module, RS485 Bus, Multi Protection

Hardware Operation

Open the casing, hardware connection diagram:

Software Operation

Using Securecrt: (Download Link: https://www.waveshare.com/w/upload/b/b7/SecureCRT.7z)
Use SecureCRT to connect to the serial port, with the default settings of 115200 baud rate, N, 8, 1. Make sure not to select XONXOFF, and choose a Ymodem packet size of 1024 bytes.

Before powering on, short the SWDIO and GND pins to enter the bootloader program.
Once the bootloader program runs, the following interface will be displayed. The program starts with the LED constantly on, detecting the SWDIO pin. If shorted, it enters the bootloader program and the LED remains constantly on. If not shorted, it jumps to the user program, and the LED slowly blinks. If the user program fails to start, the LED will blink rapidly, indicating the need to re-download the user program.

When the above interface appears, select:

Here, we directly choose option 2 to Restore device default parameters.

TAG： Jetson Orin Nano UGV Beast PT ROS2 AI OpenCV Robot Car MediaPipe 0.99inch JETSON NANO MINI Expansion Board Gyroscope Industrial Modbus RTU 8 ch Relay Module EyeLink-RC-S1 Industrial Edition 5.5 inch Touchscreen Camera R1M Card Recording Flight Controller FPV Drone ground station image transmission remote spotpear RS232 to RJ45 SpotPear Raspberry Pi Autofocus Camera Milk-V Duo S Extend Partition on SD Card or eMMC RM520N GL 5G/4G/3G M.2 Moudle IoT EMBB For LTE-A/NSA/SA And GNSS For DFOTA /VoLTE For Quectel Raspberry Pi Pico 2 RP2350-Tiny/Tiny-Kit Super Mini Board RP2350A Raspberry Pi Triple Screen HAT Raspberry Pi 5 Gen3 LuckFox Core3566 14 inch Dual LCD Computer PC Monitor Display Double Secondary Screen Type C Mini HDMI 1080P For Windows/MacOS Sipeed NanoCluster Mini Cluster Board mini data center For Raspberry Pi CM45 / Computer /LM3H /M4N CAN FD Analyzer spotpear

Modbus RTU IO 8CH Factory Reset Tutorial

Hardware Operation

Software Operation

Banana Pi M5/M4 Development board acrylic case with radiator fan option