USR IOT USR-K2

The USR-K2 is a compact serial-to-Ethernet module that enables transparent data transmission between an RJ45 Ethernet port and a TTL serial port. It can also be applied to RS232 and RS485 interfaces via level-shifting circuits.

The K2 module features low power consumption, drawing minimal current at full operating speed. Equipped with an M0-series 32-bit processor, it delivers fast processing speeds and higher efficiency. Its versatile functionality further meets the diverse needs of customers.

The K2 module is easy to operate and highly compatible. While introducing new features, it remains compatible with the K1 configuration protocol, ensuring a seamless experience for existing users. Additionally, since the K2 and K3 share similar configuration protocols, customers using the K3 protocol only need minor adjustments to apply it to the K2.

• 10/100Mbps adaptive Ethernet interface with AUTO-MDIX automatic crossover/straight-through cable switching
• Operating modes: TCP Server, TCP Client, UDP Client, UDP Server, Httpd Client
• Serial baud rate configurable from 600bps to 460.8Kbps; supports None, Odd, Even, Mark, Space parity
• Custom heartbeat packet mechanism for reliable connection verification and dead connection detection
• Custom registration packet mechanism for connection status detection, module identification, and custom packet header definition
• In TCP Server mode, the number of connected clients is configurable from 1 to 16 (default: 4); connected client IPs are displayed on the built-in web status page; TX/RX data counted per connection
• In TCP Server mode, configurable option to kick existing connections when the maximum connection count is reached
• Parameter configuration via web page, AT commands, serial protocol, and network protocol; configuration protocol provided for integration into customer software
• TCP Client short connection support with customizable disconnection timeout
• Timeout restart (no-data restart) support with customizable restart interval
• Configurable data buffer clearing before TCP connection establishment
• DHCP support for automatic IP address acquisition
• Modifiable MAC address; factory-programmed globally unique MAC with custom MAC support
• DNS support for domain name resolution
• Customizable DNS server address
• Firmware upgrade over network for convenient updates
• Virtual COM port support via USR-VCOM software developed in-house
• Factory reset via both software and hardware
• Operates across gateways, switches, and routers
• Supports both LAN operation and external network access