Introduction

The 2-CH UART TO ETH provides an easy way to communicate between UART TTL and RJ45 Ethernet, allowing bi-directional transparent data transmission. It is easy to use, along with features like fast data rate, low power consumption, high stability, suits applications such as safety & security, IoT, and so on.

Resources

Examples Codes / Config Software / User Manauls

Embedded Ethernet MAC and PHY layersFeatures

• Bi-direction transparent data transmission between UART and Ethernet
• 10/100M, full-duplex/half-duplex auto-negotiation Ethernet interface, 802.3-compliant
• Auto-MDI/MDIX, detect and switch cable type automatically
• Supports DHCP auto-obtained IP and DNS domain access
• Network parameter configuration like chip operating mode, port, IP, via host computer software or UART command
• Four operating modes: TCP CLIENT, TCP SERVER, UDP CLIENT, UDP SERVER
• 2-CH UART concurrent operation, standalone transparent transmission for each channel
• Full-duplex or half-duplex UART communication supports RS485 RX/TX auto switch
• Supports virtual serial port software (provided)
• KEEPALIVE mechanism support

Specifications

• Operating voltage:3.3V/5V
• Operating current: 140mA
• Operating mode: TCP/UDP
• UART baud rate: 300bps !921.6Kbps
• UART TTL level: 3.3V/5V compatible
• Storage temperature: -55°C ~ 125°C
• Operating temperature: -40°C ~ 85°C
• Dimensions: 53.00 x 22.00mm

Pinout

CH9121

CH9121 is a network serial port transparent transmission chip, which can realize the two-way transparent transmission of serial data and network data. It supports 4 working modes of TCP CLIENT/SERVER, UDP CLIENT/SERVER, and the serial port baud rate support range is 300bps～921600bps, which needs to be configured before use. The host computer software NetModuleConfig.exe or serial command configures the network parameters and serial parameters of the chip. After the configuration is completed, CH9121 will saves the configuration parameters to the internal storage space. After the chip is reset, CH9121 will work according to the saved configuration values.

Default configuration

The UART2 is disabled, UART1 works in TCP CLIENT mode by default. The default setting of ETH is as below:

• Device IP:192.168.1.200
• Subnet Mask: 255.255.255.0
• Gateway: 192.168.1.1
• Device Port: 2000
• Target IP: 192.168.1.100
• Target port: 1000

The default setting of the UART1 is as below:

• Baud rate: 9600
• Timeout: 0
• data bit: 8
• Stop bit: 1
• Parity: None
• Clearing buffer: Never

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