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： Raspberry Pi 5 Official Original PCIe to M.2 HAT+ Compact Expansion Board NVMe SSD SIM8260G M2 3G/4G/5G/GNSS/GPS Sub-6G PCIe M.2 Moudle For LTE-A/NSA/SA For DFOTA /VoLTE For SIMCOM ESP32 C6 Development Board 1.47 inch LCD Display Screen ST7789 For Arduino WiFi6/LVGL/HMI Onborad SD-Port/RGB-LED Cortex-A53 Raspberry Pi 5 PCIe to M.2 Mini NVMe SSD Board (E) With Customized Active Cooler Together Raspberry Pi UART Industrial-grade isolated 2-way RS485 hub repeater One RS485 TO Two RS485 SpotPear ESP32 ST7789 configuration Raspberry Pi 1.54inch LCD Bookworm-Desktop Display and Touch Raspberry Pi 1.3inch LCD Industrial USB TO 4CH RS232/485/422/TTL Serial UART Converter FT4232HL Raspberry Pi User Guide ESP32-S3 Display Milk-V Duo Information CSI-to-HDMI Raspberry Pi display Raspberry Pi 5 CR2032 Jetson 64MP Camera Raspberry Pi PICO Keyboard

Modbus RTU IO 8CH Factory Reset Tutorial

Hardware Operation

Software Operation

DTOF Laser Lidar Sensor STL27L 360° Omni Directional Lidar UART Bus