## 4 Implementation and Results
### System Configuration of Prototype Version 1  
The initially manufactured prototype version 1 of the agricultural environment monitoring server system is shown in Figure 6, and comprised soil sensors, environmental sensors, CCTV, and GPS module to collect information on the outdoors environment and image information, solar cells to supply power for the server system, and a server to process and store the collected information.  
The soil sensors collect information on soil temperature and soil moisture in the outdoors environment, and Figure 7 and Table 1 show that the specifications of the soil sensors and the specific hardware used in the agricultural environment monitoring server system.  
Figure 6: Prototype Version 1 of the Agricultural Environment Monitoring Server System.  
Figure 7: Soil sensor.  
The environmental sensor node receives the sensor data from temperature, humidity, luminance sensors. It processes the data using a MSP430 MCU [27] and transmits them to relay nodes and gateways, using a CC2420 RF chip [28]. In order to reduce the impact of the heat the sensor receives from the node, the node and the sensor are kept at a certain distance from each other. The MSP430 is a 16 bit RISC with 48 Kbyte program memory and 10 Kbyte RAM inside. It can process multiple sensor data at high speed. CC2420 is a RF chip supporting Zigbee. It supports the 2,400 \(\sim\) 2,483.5 MHz frequency band. It operates in DDDS method, supports the O-QPSK modulation method and 250 kbps baud rate. It enables real time wireless communication with small power consumption. Figure 8 and Table 2 show that the specifications of the environmental sensor and the hardware used in the agricultural environment monitoring server system.  
For the CCTV an IP-based surveillance camera was installed. These cameras are normally used to determine when a burglary or an accident _etc._ has occurred, or to check the current outdoors environment in real time by monitoring and recording the outdoors environment 24 hours a day.  
The GPS module collects the location of the server system installed outdoors and the location information of the collected outdoors information. Figure 9 and Table 3 show that the specifications of GPS module and hardware used in the agricultural environment monitoring server system.  
\begin{table}
\begin{tabular}{l|l} \hline
**Hardware Type** & **Hardware Specifications** \\ \hline Processor & Data Bus Width: 16 bit \\ (MSP430F1611) & Program Memory Size: 48 KB \\  & Data RAM Size: 10 KB \\  & Maximum Clock Frequency: 8 MHz \\  & On-Chip ADC: 8-chx12-bit \\  & On-Chip DAC: 2-chx12-bit \\  & Number of Programmable I/Os: 48 \\  & Interface Type: USART \\  & Operating Supply Voltage: 1.8 V to 3.6 V \\  & Maximum Operating Temperature: 85 °C \\  & Minimum Operating Temperature: \(-\)40 °C \\ \hline RF Device & Radio Frequency (Mhz): 2,400 \\ (CC2420) & Max. Data Rate (kbits/sec): 250 \\  & Antenna: PCB Antenna or SMA \\ \hline Temperature Humidity & Vmax (VDD): 2.4–5.5 \\ Sensor & Humidity range: 0–100\% RH \\ (SHT-71) & Humidity Accuracy: \(\pm\)3% RH (20–80\% RH) \\  & Repeatability: \(\pm\)0.1\% RH \\  & Temperature Accuracy: \(\pm\)0.4 °C @ 25 °C \\ \hline Luminance & Vmax (VDC): 150 \\ Sensor & Pmax (mW): 100 \\ (GL5547) & Ambient Temp ( °C): \(\times\)30 \(\sim\) +70 \\  & Spectral Peak (nm): 540 \\  & Response Time (ms): Rise 20, Decay 30 \\ \hline \end{tabular}
\end{table}
Table 2: Hardware Specifications of the Environmental Sensors.  
Figure 9: GPS Module.  
Even though the prototype version 1 manufactured as described was shown to monitor environmental and soil information, image information, and location information acquiring from WSN sensors and other physical devices through the GUI, it has serious power consumption issues that limited its practical use.