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35 I S M O S A T, Proceeding International Symposium For Modern School Development, ....
Fig. 9 Thingspeak Channel Performance
4.3 IoT Control System
The work principle of IoT control system is that use the network as an intermediary for
the data that is sent through the server thing- speak channel. In this research, the data sent
from the microcontroller to thingspeak chan- nel will trigger commands that allow thing-
speak channel to communicate with another device. For example relay module. When
thingspeak channel gets the data value is 1 then thingspeak channel will trigger the mi-
crocontroller to power on the relay, but if it is 0 then thingspeak channel will trigger the
microcontroller to turn off the relay Fig. 10
Fig. 10 IoT Control System on Thingspeak Channel
4.4 Overall Result
The overall result of this research will appear on Table 1 below.
Table 1 Result of Delphi-IoT System
No Parameter Result
1 Thermal N ≤ 30
Lamp On 2
Thermal N ≥ 31 Lamp Off
3 Thermal N ≥ 33
Fan On 4
Thermal N ≤ 31 Fan Off
5 Delphi Button Lamp
ON Local Service Lamp On
6 Delphi Button Lamp
Off Local Service Lamp off
7 Delphi Button Fan ON
Local Service Fan On
8 Delphi Button Fan Off
Local Service Fan off
9 Datalogging Sensor on
Local Service Stored on Delphi,
Access 10
Datalogging Sensor on Interlocal Service
Stored on Thingspeak
Channel 11
Control Electric Devices Interlocal Service
Thingspeak Channel
5 Conclusion
This research has several outcome such as monitoring sensor, datalogging sensor and
controlling electric devices. This research can run on two mode, interlocal service and local
service. Interlocal service using TCP Connec- tion for data communication, while local ser-
vice using USART communication. Interlocal service utilize thingspeak channel for data
processing through internet, while local ser- vice using Delphi application to process hu-
man interaction process. This application has classic problem which still relies on internet
connection.
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