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1. DESIGN OF ARM-BASED EMBEDDED ETHERNET
INTERFACE
With the development of network technology and communication technology, the need
that industrial control can be completed via network has become a trend. In traditional industrial
control system or data acquisition system, the structure that one host connects multiple serial
devices through multiport serial cards is adopted. The task of host is to communicate with each
serial device, process data and interact between the operator and computer. This structure is
feasible in the case of fewer devices, lower transmission rate. So a solution need be found to
realize the communication between industrial control devices and Ethernet. As the embedded
system itself has the performance of network and human-computer interaction, it is possible that
the embedded system replaces the previous control method based on microcontroller. So an
ARM processor based embedded Ethernet interface system is designed.
Existing System:
In existing system, if the host needs to connect more serial devices at the same time with
higher transmission rate and the data processing is more complex, the system performance is
poor. In addition, these serial devices connect the same host may be geographically far and this
will increase the length of wiring and drop communication quality.
Proposed system:
The design mainly consists of RF transceiver with SPI communication module, processor
module and Ethernet interface module. SPI communication module is the interface between
central processing unit and RF transceiver module. Its work is to receive data form RF
transceiver module and then transmit them to the microcontroller ARM7 LPC2129. Data from
the different source is received by RF transceiver through SPI communication. Then the received
data is fed to the microprocessor. The processor then uploads the data to internet using Ethernet
interface. In the Ethernet, in order to send the data to Ethernet in the system, the local IP address

2. and subnet mask must be set firstly, and the appropriate commands and data’s were sent to the
host computer through serial to Ethernet interface driver.
Block Diagram:
Sensor Node1:
Power Supply
LCD
Temperature
sensor
Sensor Node2:
PIC
16F877A
RF Transceiver

3. Power Supply
LCD
Gas sensor
PIC
RF Transceiver
16F877A
Main Node:
Power Supply
RF Transceiver
ARM7
LPC2129
Ethernet
Interface

4. Hardware Requirements:
 ARM7 LPC2129 Microprocessor
 PIC Microcontroller.
 LCD
 Ethernet converter
 Gas Sensor
 Temperature Sensor
 RF Transceiver
Software Requirements:
 Embedded C
 CCS or MP LAB Compiler
 Keil Compiler
Advantages:
 Higher data transmission rate.
 Long distance communication.