Universitas Sumatera Utara

Program pada Mikrokontroller

$regfile = "m8535.dat" $crystal = 8000000

$baud = 9600 Dim Ctr As Byte

Dim Dataword As Word Dim Command As Byte Dim Dis As String * 20 Dim Calc As Single Dim Calc2 As Single Dim Rhlinear As Single Dim Rhlintemp As Single Dim Tempc As Single Dim Tempf As Single

Deflcdchar 0 , 14 , 17 , 17 , 14 , 32 , 32 , 32 , 32 ' replace ? with number (0-7)

Dim Putrn As Integer Dim Hit As Integer 'Dim I As Integer

Config Lcdpin = Pin , Db4 = Porta.2 , Db5 = Porta.3 , Db6 = Porta.4 , Db7 = Porta.5 , E = Porta.1 , Rs = Porta.0

Config Lcd = 16 * 2

Config Timer0 = Counter , Edge = Rising Config Timer1 = Timer , Prescale = 1024 On Timer1 Label2

Const C1 = -4 'Konstanta untuk konversi data SHT-11 ke nilai

Const C2 = 0.0405 'nyata sebenarnya (rumus menurut datasheet)

Const C3 = -0.0000028 Const T1c = .01

Const T2 = .00008 Const T1f = .018

Sck Alias Portc.1 Dataout Alias Portc.0 Datain Alias Pinc.0 Redled Alias Portc.2

Declare Sub Calc_crc(byval X As Byte) Declare Sub Getit()

Ddrc = &B11111111 'mengaktifkan internal pullup

Config Pinc.0 = Output 'sck Config Pinc.1 = Output 'datain

'mereset komunikasi serial terlebih dahulu Set Dataout For Ctr = 1 To 12 Set Sck Waitus 2 Reset Sck Waitus 2 Next Ctr Enable Interrupts Enable Timer1 Start Timer1 Tcnt0 = 0 Hit = 0

Do 'prosedur penampilan suhu dan temperatur terus-menerus

Cls

Putrn = Tcnt0

Command = &B00000011 Z1(1) = 3

Call Getit 'Get the temperature, puts result in "dataword" for us

Tempf = T1f * Dataword Tempf = Tempf - 40

Tempc = T1c * Dataword 'get celcius for later calculations and for "the rest of the world"

Tempc = Tempc - 40

Print "Suhu = " ; Dis ; "C"

Locate 1 , 1 : Lcd "Suhu = " ; Dis ; " " ; Chr(0) ; "C" Wait 1

Command = &B00000101 Z1(1) = 5

Call Getit 'get the humidity

Calc = C2 * Dataword

Calc2 = Dataword * Dataword 'that "2" in the datasheet sure looked like a footnote for a couple days, nope it means "squared"!

Calc2 = C3 * Calc2 Calc = Calc + C1

Rhlinear = Calc + Calc2

'Dis = Fusing(rhlinear , "##.##")

'Print "Humidity adjusted for linear = " ; Dis Calc = T2 * Dataword

Calc = Calc + T1c Calc2 = Tempc - 25 Calc = Calc2 * Calc

Rhlintemp = Calc + Rhlinear

Dis = Fusing(rhlintemp , "##.##") Print "Humid:" ; Dis ; "%"

Locate 2 , 0 : Lcd "Hum = " ; Dis ; " %RH" Wait 1

Loop Label2: Cls

Lcd "Kec Angin:" ; Putrn ; " ptr" Print "Kec Angin : " ; Putrn ; " ptr" Wait 1 Hit = Hit + 1 If Hit = 8 Then Tcnt0 = 0 Hit = 0 For I = 0 To 10 Cls

Lcd "Kec Angin: " ; Putrn ; " rpm" Print "Kec Angin : " ; Putrn ; " rpm" Waitms 100

End If

Start Timer1 Return

Sub Getit()

Local Datavalue As Word Local Databyte As Byte

'start with "transmission start" Set Sck Reset Dataout Reset Sck Set Sck Set Dataout Reset Sck

'now send the command

Shiftout Dataout , Sck , Command , 1

Ddrd = &B11111101 'datain is now input

Config Pinc.0 = Input 'datain Set Sck 'click one more off

Reset Sck

Waitus 10 'no idea why, but it doesn't work without it!

Bitwait Pinc.0 , Reset 'wait for the chip to have data ready

Shiftin Datain , Sck , Databyte , 1 'get the MSB

Datavalue = Databyte Z1(2) = Databyte Ddrd = &B11111111

Config Pinc.0 = Output

Reset Dataout 'this is the tricky part- Lot's of hair pulling- have to tick the ack!

Set Sck Reset Sck

Ddrd = &B11111101 'datain is now input Config Pinc.0 = Input

Shiftin Datain , Sck , Databyte , 1 'get the LSB

Z1(3) = Databyte

Shift Datavalue , Left , 8

Datavalue = Datavalue Or Databyte 'don't tick the clock or ack

since we don't need the CRC value, leave it hanging!

Dataword = Datavalue Ddrd = &B11111111

Config Pinc.0 = Output Reset Dataout

Set Sck Reset Sck

Ddrd = &B11111101 'datain is now input

Config Pinc.0 = Input

Shiftin Datain , Sck , Databyte , 1

Ddrd = &B11111111

Config Pinc.0 = Output Set Dataout

Set Sck Reset Sck End Sub End

PEROGRAM VISUAL BASIC UNTUK TAMPILAN PC

Private Sub cmd_close_Click() Unload Me

End Sub

Private Sub cmd_start_Click() Timer2.Enabled = True

End Sub

Private Sub cmd_stop_Click() Timer2.Enabled = False

End Sub

Private Sub Form_Load() Frame1.BackColor = &HFFFFFF Timer2.Enabled = False Timer1.Enabled = True MSComm1.PortOpen = True MSComm1.DTREnable = True MSComm1.RTSEnable = True Adodc1.Refresh End Sub

Private Sub Label1_Change() If Label1.Caption <> "" Then Label2.Caption = Label1.Caption End If

End Sub

Private Sub Label2_Change() a = Left(Label2.Caption, 1) If a = "S" Then Label3.Caption = Label2.Caption End If If a = "H" Then Label4.Caption = Label2.Caption End If

If a = "K" Then

Label6.Caption = Label2.Caption End If

End Sub

Private Sub Label6_Change()

a = Left(Right(Label6.Caption, 3), 1) If a = "m" Then Label8.Caption = Left(Right(Label6.Caption, 7), 2) w = Val(Label8.Caption)/ 60 v = w * 0.04 * 0.2512 Label13 = v End If End Sub

Private Sub Timer1_Timer() a = MSComm1.Input

Label1.Caption = a Label5.Caption = Now End Sub

Private Sub Timer2_Timer() Adodc1.Recordset.AddNew Adodc1.Recordset.Fields("waktu").Value = Label5.Caption Adodc1.Recordset.Fields("suhu").Value = Left(Label3.Caption, 14) Adodc1.Recordset.Fields("kelembaban").Value = Left(Label4.Caption, 12) Adodc1.Recordset.Fields("kecepatan_angin").Value = Left(Label6.Caption, 16) Adodc1.Recordset.Update Adodc1.Refresh End Sub

Data Hasil Pengukuran yang dihasilkan dari Sistem dan BMKG

Table1 Waktu (11/26/2010 ) Suhu dari SHT (oC) Kelembaban dari SHT (%) Kec.angin dari sistem(m/s) Suhu dari BMKG(o C) Kelembaban dari BMKG(%) Kec.angin dari BMKG (m/s) 6:00 23.50 88.07 1.87 24.6 99 2 7:00 25.03 88.03 1.95 25.8 98.5 2 8:00 28.22 88.03 4.74 28.2 89.5 3 9:00 28.80 68.00 5.11 29.6 65.5 5 10:00 29.89 60.06 5.18 30.2 59 5 11:00 28.18 82.11 6.00 27.3 82 6 12:00 27.65 88.08 6.18 27.4 87.5 6 13:00 28.30 78.17 5.09 28 78.5 5 14:00 27.84 78.14 5.99 27.6 78.5 6 15:00 27.84 81.00 4.07 27.7 80 4 16:00 27.84 81.28 4.98 27.6 81 5 17:00 26.58 82.12 4.99 26.7 82 5 18:00 25.75 87.60 3.00 25.8 89 3 19:00 25.22 88.98 1.98 25.1 94 2 20:00 25.23 90.25 1.98 25.1 96.5 2 21:00 25.20 91.17 3.01 25.1 96.5 3 22:00 24.83 95.35 1.99 24.4 97 2 23:00 24.45 95.69 1.86 23.9 97.5 2 00:00 24.18 95.94 1.89 23.5 98.5 2 01:00 24.05 95.97 1.93 23.4 98.5 2 02:00 23.89 95.98 1.97 23 99 2 03:00 23.43 96.00 1.97 23.1 99 2 04:00 23.65 96. 1.90 23.2 99.5 2 05:00 23.89 96.23 1.20 23.2 99.5 1 06:00 23.5 96.28 2.02 23.4 99.5 2

Data Hasil Pengukuran yang dihasilkan dari Sistem dan BMKG

Table1 Waktu (11/22/2010 ) Suhu dari SHT (oC) Kelembaban dari SHT (%) Kec.angin dari sistem (m/s) Suhu dari BMKG (oC) Kelembaban dari BMKG(%) Kec.angin dari BMKG(m/s) 23:00 26.50 82.88 3.17 _{25.6 84 3} 00:00 26.03 83.03 3.15 24.7 87 3 1:00 25.22 85.37 3.15 24.3 91 3 2:00 24.80 88.00 2.0 23.7 94.5 2 3:00 24.59 88.26 2.41 23.5 96.5 2 4:00 24.18 88.43 1.25 23.2 98 1 5:00 24.65 88.48 2.00 23.4 98.5 2 6:00 25.30 88.49 2.23 24.1 98.5 2 7:00 27.84 85.20 2.24 27.8 93 2 8:00 28.84 73.12 2.30 29.6 67 2 9:00 28.89 73.01 3.11 29.9 64 3 10:00 28.90 68.96 4.88 29.9 65.5 5 11:00 31.14 67.52 5.43 30.5 64.5 6 12:00 31.68 66.98 5.40 30.8 62.5 6 13:00 32.23 67.25 5.48 31 63.5 6 14:00 30.10 70.17 5.49 29.9 68 6 15:00 28.83 73.35 5.25 27.5 73 6 16:00 28.45 75.69 5.11 26.3 79 5 17:00 24.18 82.94 4.89 25.5 83.5 5 18:00 24.05 83.76 2.65 24.8 89 3 19:00 23.89 86.43 1.00 24.5 93 1 20:00 23.43 88.18 1.89 24.8 95.5 2 21:00 24.65 88.37 1.89 25.1 96 2 22:00 25.89 86.59 2.25 25 94.5 3 23:00 23.5 88.38 2.25 24.8 96.5 2 0:00 23.67 88.30 2.28 24.9 96 2

Pengujian Sistem Alat untuk Menentukan Kestabilan

Data yang di Ukur.

Pemilik : Ellis Naria Pakpahan

Nama Alat : Prototipe Stasiun Cuaca Mini Berbasis Mikrokontroller ATmega8535

Tanggal Pengukuran : 19 November 2010

Lokasi pengukuran : Lapangan BMKG Sampali Waktu (11/19/2010) suhu ('C) kelembaban (%) kec_angin (m/s) 9:35 28 76 0 9:40 28.82 76 0 9:45 28.82 68.5 0 9:50 28.8 71 0 9:55 28.8 68.5 0 10:00 29.5 68.5 0.03768 10:05 29.15 76.33 0.03768 10:10 29.15 76.21 0.03768 10:15 29.13 76.21 0.03768 10:20 29.15 76.2 0.03768 10:25 29.5 76.11 2.93066 10:30 29.9 76.18 2.93066 10:35 29.6 68.83 2.93066 10:40 28.6 68.75 2.93066 10:45 29.91 68.5 2.93066 10:50 30.64 68.56 3.34933 10:55 30.89 66.94 3.34933 11:05 31.25 66.78 3.34933 11:10 30.73 66.73 3.34933 11:15 30.64 66.71 3.34933 11:20 30.5 66.78 4.18666 11:25 30.5 66.65 4.18666 11:30 30.64 66.65 8.37333 11:35 30.64 66.68 8.37333 11:40 30.6 66.65 8.37333

Grafik Perbandingan dari Data dapat di lihat pada Gambar dibawah ini.

Hasil Pengukuran terhadap Waktu

0

10

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90

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waktu

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suhu('C) kelembaban (%) kec.angin (m/s)

Gambar 1. Grafik dari hasil pengukuran untuk menentukan Kestabilan data.

Perbandingan Pengukuran Suhu terhadap waktu

(26/11/2010)

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waktu

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Suhu dariSHT('C) Suhu dari BMG('C)

Gambar 2. Grafik Perbandingan Hasil Pengukuran Data Suhu antara SHT11

dengan Suhu dari BMG.

Perbandingan Pengukuran kelembaban terhadap waktu

(26/11/2010)

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Kelembaban dari SHT(%) Kelembaban dari BMG(%)

Gambar 3. Grafik Perbandingan Hasil Pengukuran Data Kelembaban antara

SHT11 dengan Kelembaban dari BMG.

Perbandingan Pengukuran Kec.Angin terhadap Waktu

(26/11/2010)

0 1 2 3 4 5 6 7 6:00 8:00 _10:00 _12:00 _14:00 _16:00 _18:00 _20:00 _22:00 0:00 2:00 4:00 waktu K ec .A n g in (m /s ) Kec.Angin dari sistem alat (m/s) Kec.Angin dari Anemometer (m/s)

Gambar 4. Grafik Perbandingan Hasil Pengukuran Data Kec.Angin antara

Fotodioda dengan Kec.Angin dari BMG.

SCK Da ta AT m eg a8 535