Спасибо Мареку
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The HelloDevice SS100 from Sena Technologies is a Linux-based serial to Ethernet converter with 32-bit Processor, Embedded web server, and open Linux platform to manage serial devices over the network. The HelloDevice SS100 supports RS232/422/485 serial communication allowing virtually any asynchronous serial device to be accessed over a network via its DB9 serial port and handles serial data transfer rate up to 230 kbit/s. The unit supports TCP/UDP based communication modes, and presents a modem interface to the attached serial device in modem emulation mode. It accepts AT modem commands and makes raw serial data to travel across a local LAN.
