HF HF2211A - Hardware Introduction; Interface Definition; Figure 2. HF2211 A Interface

HF2211A Serial Server Device User Manual
http://www.iotworkshop.com -
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2. HARDWARE INTRODUCTION
The HF2211A unit is a complete solution for serial port device connecting to network. This powerful
device supports a 10/100BASE-T Ethernet connection, a reliable and proven operating system stored
in flash memory, an embedded web server, a full TCP/IP protocol stack, and standards-based (AES)
encryption.
2.1. Interface Definition
Figure 2. HF2211A Interface