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33 I S M O S A T, Proceeding International Symposium For Modern School Development, ....
measurement of temperature and humidity. LM35 is temperature sensor which has
principle the sensor will perform during the sensing of temperature change, every 1 ° C
rise in temperature will show increase in the voltage of 10 mV. Although the voltage sensor
can reach 30 volts but given to the sensor is at 5 volts, so it can be used with a single power
supply with the provision that the LM35 only requires a current of 60 uA it meant LM35 has
the ability to generate heat self-heating of sensors that may cause low readings of less
than 0.5 ºC at 25 º
2.3 Unit Storage – Thingspeak
Thingspeak is an internet network cloud platform that provides a variety of exclusive
services to build applications IOT Internet of Things. Thingspeak features a real-time data
collection, visualization of data in graphi- cal form, as well as providing plugins used
to collaborate with web services, social net- work or API. The main feature of Thingspeak
is Thingspeak Channel. Thingspeak Chan- nel is a place where we can send the data
to Thingspeak to be shown on the channel. Thingspeak Channel has features include 1
8 columns for universal data; 2 3 Columns for locations such as latitude, longitude, and
elevation; and 3 one column to display the status of what data is displayed on the chan-
nel.
Fig. 2 External Monitoring – Thingspeak
2.4 Unit Execution – Delphi Interface
Delphi is an IDE compiler for the Pascal programming language and software devel-
opment environment that is used to design an application program. IDE Integrated De-
velopment Environment is a computer pro- gram that has some of the facilities that are
required in the software development. The purpose of the IDE is to provide all the utili-
ties needed to build software. In this research, some of components are required, among
others: 1 Button; 2 Chart; 3 Label; 4 List Box; 5 Edit Text; 6 Ado Table; 7 comport;
8 groupbox; 9 and RV Project.
Fig. 3 Delphi Interface
3 Delphi-IoT Performance 3.1 Automatic System Flowchart
Based on ig.4 of the lowchart, the sys- tem has an input that can affect the output
lights and fans is the input temperature sensor LM35 read through, this was the sys-
tem in automatic mode. As for the humidity does not affect either the lamp or fan output,
which is read by the humidity sensor DHT11 only displayed on a monitoring system that
uses Delphi. If the temperature N is read ≤ 30 then outputs a lamp is lit, and when the
value of N ≥ 31, then the light will die. As for turning on the fan output then reads tem-
perature values should be ≥ 33 and to turn off the fan value of N should be ≤ 31.
Fig. 4 Automatic System Flowchart
3.2 Manual System Flowchart
Based on ig.5 of lowchart, the system which can be seen that the input provided is
