Universitas Sumatera Utara

Universitas Sumatera Utara

Program pada Mikrokontroller $regfile = "m8535.dat" $crystal = 8000000 $baud = 9600 Dim Dim Dim Dim

Ctr As Byte Dataword As Word Command As Byte 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 SHT-11 ke nilai Const C2 = 0.0405 datasheet) Const C3 = -0.0000028 Const T1c = .01 Const T2 = .00008 Const T1f = .018

'Konstanta untuk konversi data 'nyata sebenarnya (rumus menurut


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 terus-menerus

'prosedur penampilan suhu dan temperatur

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 Dis = Fusing(tempc , "###.##")


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 Next I


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 now input Config Pinc.0 = Input Shiftin Datain , Sck , Databyte , 1

'datain is

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 Suhu Waktu Suhu Kelembaban Kec.angin Kelembaban dari Kec.angin dari (11/26/2010 dari SHT dari SHT dari o dari BMKG( BMKG (m/s) ) (oC) (%) sistem(m/s) BMKG(%) C) 6:00 23.50 88.07 1.87 99 2 24.6 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 Suhu Kelembaban Kec.angin Suhu dari Kelembaban Kec.angin (11/22/2010 dari SHT dari SHT dari sistem BMKG dari dari ) (oC) (%) (m/s) (oC) BMKG(%) BMKG(m/s) 82.88 3.17 23:00 26.50 25.6 84 3 00:00 26.03 1:00 25.22 2:00 24.80 3:00 24.59 4:00 24.18 5:00 24.65 6:00 25.30 7:00 27.84 8:00 28.84 9:00 28.89 10:00 28.90 11:00 31.14 12:00 31.68 13:00 32.23 14:00 30.10 15:00 28.83 16:00 28.45 17:00 24.18 18:00 24.05 19:00 23.89 20:00 23.43 21:00 24.65 22:00 25.89 23:00 23.5 0:00 23.67

83.03 85.37 88.00 88.26 88.43 88.48 88.49 85.20 73.12 73.01 68.96 67.52 66.98 67.25 70.17 73.35 75.69 82.94 83.76 86.43 88.18 88.37 86.59 88.38 88.30

3.15 3.15 2.0 2.41 1.25 2.00 2.23 2.24 2.30 3.11 4.88 5.43 5.40 5.48 5.49 5.25 5.11 4.89 2.65 1.00 1.89 1.89 2.25 2.25 2.28

24.7

87

3

24.3

91

3

23.7

94.5

2

23.5

96.5

2

23.2

98

1

23.4

98.5

2

24.1

98.5

2

27.8

93

2

29.6

67

2

29.9

64

3

29.9

65.5

5

30.5

64.5

6

30.8

62.5

6

31

63.5

6

29.9

68

6

27.5

73

6

26.3

79

5

25.5

83.5

5

24.8

89

3

24.5

93

1

24.8

95.5

2

25.1

96

2

25

94.5

3

24.8

96.5

2

24.9

96

2


Pengujian Sistem Alat untuk Menentukan Kestabilan Data yang di Ukur.

Pemilik Nama Alat ATmega8535 Tanggal Pengukuran Lokasi pengukuran Waktu (11/19/2010) 9:35 9:40 9:45 9:50 9:55 10:00 10:05 10:10 10:15 10:20 10:25 10:30 10:35 10:40 10:45 10:50 10:55 11:05 11:10 11:15 11:20 11:25 11:30 11:35 11:40

: Ellis Naria Pakpahan : Prototipe Stasiun Cuaca Mini Berbasis Mikrokontroller : 19 November 2010 : Lapangan BMKG Sampali

suhu kelembaban kec_angin ('C) (%) (m/s) 28 76 0 28.82 76 0 28.82 68.5 0 28.8 71 0 28.8 68.5 0 29.5 68.5 0.03768 29.15 76.33 0.03768 29.15 76.21 0.03768 29.13 76.21 0.03768 29.15 76.2 0.03768 29.5 76.11 2.93066 29.9 76.18 2.93066 29.6 68.83 2.93066 28.6 68.75 2.93066 29.91 68.5 2.93066 30.64 68.56 3.34933 30.89 66.94 3.34933 31.25 66.78 3.34933 30.73 66.73 3.34933 30.64 66.71 3.34933 30.5 66.78 4.18666 30.5 66.65 4.18666 30.64 66.65 8.37333 30.64 66.68 8.37333 30.6 66.65 8.37333


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

Hasil Pengukuran terhadap Waktu 90 80 70 pengukuran

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

50 40 30 20 10

:4 0

11

:3 0

11

:2 0

11

:1 0

:5 5

11

waktu

10

:4 5

10

:3 5

10

:2 5

10

:1 5

10

:0 5

10

9: 55

9: 45

9: 35

0

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


Suhu dari SHT('C) Suhu dari BMG('C)

6: 00 8: 00 10 :0 0 12 :0 0 14 :0 0 16 :0 0 18 :0 0 20 :0 0 22 :0 0 0: 00 2: 00 4: 00

suhu('C)

35 30 25 20 15 10 5 0

Perbandingan Pengukuran Suhu terhadap waktu (26/11/2010)

waktu

Gambar 2. Grafik Perbandingan Hasil Pengukuran Data Suhu antara SHT11 dengan Suhu dari BMG.


60 40 20 0 00

00 4:

waktu

2:

10 :0 0 12 :0 0 14 :0 0 16 :0 0 18 :0 0 20 :0 0 22 :0 0 0: 00

00

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

8:

6:

00

kelembaban (%)

120 100 80

Perbandingan Pengukuran kelembaban terhadap waktu (26/11/2010)

Gambar 3. Grafik Perbandingan Hasil Pengukuran Data Kelembaban antara SHT11 dengan Kelembaban dari BMG.


Perbandingan Pengukuran Kec.Angin terhadap Waktu (26/11/2010) 7

Kec.Angin dari sistem alat (m/s) Kec.Angin dari Anemometer (m/s)

Kec.Angin (m/s)

6 5 4 3 2 1

4: 00

2: 00

0: 00

:0 0

:0 0 22

waktu

20

:0 0 18

:0 0 16

:0 0 14

:0 0 12

:0 0 10

8: 00

6: 00

0

Gambar 4. Grafik Perbandingan Hasil Pengukuran Data Kec.Angin antara Fotodioda dengan Kec.Angin dari BMG.


ATmega8535 SCK Data


Universitas Sumatera Utara

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