-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathOnionDevices.py
304 lines (268 loc) · 9.84 KB
/
OnionDevices.py
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
#class for devices
from OmegaExpansion import onionI2C
import time
class BME280(object):
"""docstring for BME280."""
def __init__(self, i2c):
super(BME280, self).__init__()
self.I2C = i2c
self.dig_T1 = 0
self.dig_T2 = 0
self.dig_T3 = 0
self.dig_H1 = 0
self.dig_H2 = 0
self.dig_H3 = 0
self.dig_H4 = 0
self.dig_H5 = 0
self.dig_H6 = 0
self.dig_H7 = 0
self.dig_P1 = 0
self.dig_P2 = 0
self.dig_P3 = 0
self.dig_P4 = 0
self.dig_P5 = 0
self.dig_P6 = 0
self.dig_P7 = 0
self.dig_P8 = 0
self.dig_P9 = 0
def initialize(self):
"""
Get intial Values from BME280
"""
# BME280 address, 0x76(118)
# Read data back from 0x88(136), 24 bytes
b1 = self.I2C.readBytes(0x76, 0x88, 24)
# Convert the data
# Temp coefficents
self.dig_T1 = b1[1] * 256 + b1[0]
self.dig_T2 = b1[3] * 256 + b1[2]
if self.dig_T2 > 32767 :
self.dig_T2 -= 65536
self.dig_T3 = b1[5] * 256 + b1[4]
if self.dig_T3 > 32767 :
self.dig_T3 -= 65536
# Pressure coefficents
self.dig_P1 = b1[7] * 256 + b1[6]
self.dig_P2 = b1[9] * 256 + b1[8]
if self.dig_P2 > 32767 :
self.dig_P2 -= 65536
self.dig_P3 = b1[11] * 256 + b1[10]
if self.dig_P3 > 32767 :
self.dig_P3 -= 65536
self.dig_P4 = b1[13] * 256 + b1[12]
if self.dig_P4 > 32767 :
self.dig_P4 -= 65536
self.dig_P5 = b1[15] * 256 + b1[14]
if self.dig_P5 > 32767 :
self.dig_P5 -= 65536
self.dig_P6 = b1[17] * 256 + b1[16]
if self.dig_P6 > 32767 :
self.dig_P6 -= 65536
self.dig_P7 = b1[19] * 256 + b1[18]
if self.dig_P7 > 32767 :
self.dig_P7 -= 65536
self.dig_P8 = b1[21] * 256 + b1[20]
if self.dig_P8 > 32767 :
self.dig_P8 -= 65536
self.dig_P9 = b1[23] * 256 + b1[22]
if self.dig_P9 > 32767 :
self.dig_P9 -= 65536
# BME280 address, 0x76(118)
# Read data back from 0xA1(161), 1 byte
b1 = self.I2C.readBytes(0x76, 0xA1, 1)
self.dig_H1 = b1[0]
# BME280 address, 0x76(118)
# Read data back from 0xE1(225), 7 bytes
b1 = self.I2C.readBytes(0x76, 0xE1, 7)
# Convert the data
# Humidity coefficents
self.dig_H2 = b1[1] * 256 + b1[0]
if self.dig_H2 > 32767 :
self.dig_H2 -= 65536
self.dig_H3 = (b1[2] & 0xFF)
self.dig_H4 = (b1[3] * 16) + (b1[4] & 0xF)
if self.dig_H4 > 32767 :
self.dig_H4 -= 65536
self.dig_H5 = (b1[4] / 16) + (b1[5] * 16)
if self.dig_H5 > 32767 :
self.dig_H5 -= 65536
self.dig_H6 = b1[6]
if self.dig_H6 > 127 :
self.dig_H6 -= 256
# BME280 address, 0x76(118)
# Select control humidity register, 0xF2(242)
# 0x01(01) Humidity Oversampling = 1
self.I2C.writeByte(0x76, 0xF2, 0x01)
# BME280 address, 0x76(118)
# Select Control measurement register, 0xF4(244)
# 0x27(39) Pressure and Temperature Oversampling rate = 1
# Normal mode
self.I2C.writeByte(0x76, 0xF4, 0x27)
# BME280 address, 0x76(118)
# Select Configuration register, 0xF5(245)
# 0xA0(00) Stand_by time = 1000 ms
self.I2C.writeByte(0x76, 0xF5, 0xA0)
def get_measurements(self):
"""
Get Pressure from BME280
"""
# BME280 address, 0x76(118)
# Read data back from 0xF7(247), 8 bytes
# Pressure MSB, Pressure LSB, Pressure xLSB, Temperature MSB, Temperature LSB
# Temperature xLSB, Humidity MSB, Humidity LSB
data = self.I2C.readBytes(0x76, 0xF7, 8)
# Convert pressure and temperature data to 19-bits
adc_p = ((data[0] * 65536) + (data[1] * 256) + (data[2] & 0xF0)) / 16
adc_t = ((data[3] * 65536) + (data[4] * 256) + (data[5] & 0xF0)) / 16
# Convert the humidity data
adc_h = data[6] * 256 + data[7]
# Temperature offset calculations
var1 = ((adc_t) / 16384.0 - (self.dig_T1) / 1024.0) * (self.dig_T2)
var2 = (((adc_t) / 131072.0 - (self.dig_T1) / 8192.0) * ((adc_t)/131072.0 - (self.dig_T1)/8192.0)) * (self.dig_T3)
t_fine = (var1 + var2)
cTemp = (var1 + var2) / 5120.0
fTemp = cTemp * 1.8 + 32
# Pressure offset calculations
var1 = (t_fine / 2.0) - 64000.0
var2 = var1 * var1 * (self.dig_P6) / 32768.0
var2 = var2 + var1 * (self.dig_P5) * 2.0
var2 = (var2 / 4.0) + ((self.dig_P4) * 65536.0)
var1 = ((self.dig_P3) * var1 * var1 / 524288.0 + ( self.dig_P2) * var1) / 524288.0
var1 = (1.0 + var1 / 32768.0) * (self.dig_P1)
p = 1048576.0 - adc_p
p = (p - (var2 / 4096.0)) * 6250.0 / var1
var1 = (self.dig_P9) * p * p / 2147483648.0
var2 = p * (self.dig_P8) / 32768.0
pressure = (p + (var1 + var2 + (self.dig_P7)) / 16.0) / 100
# Humidity offset calculations
var_H = ((t_fine) - 76800.0)
var_H = (adc_h - (self.dig_H4 * 64.0 + self.dig_H5 / 16384.0 * var_H)) * (self.dig_H2 / 65536.0 * (1.0 + self.dig_H6 / 67108864.0 * var_H * (1.0 + self.dig_H3 / 67108864.0 * var_H)))
humidity = var_H * (1.0 - self.dig_H1 * var_H / 524288.0)
if humidity > 100.0 :
humidity = 100.0
elif humidity < 0.0 :
humidity = 0.0
return pressure, humidity, cTemp
class BMP180(object):
"""docstring for BMP180."""
def __init__(self, i2c):
super(BMP180, self).__init__()
self.I2C = i2c
self.AC1 = 0
self.AC2 = 0
self.AC3 = 0
self.AC4 = 0
self.AC5 = 0
self.AC6 = 0
self.B1 = 0
self.B2 = 0
self.MB = 0
self.MC = 0
self.MD = 0
def initialize(self):
# BMP180 address, 0x77(119)
# Read data back from 0xAA(170), 22 bytes
data = self.I2C.readBytes(0x77, 0xAA, 22)
# Convert the data
self.AC1 = data[0] * 256 + data[1]
if self.AC1 > 32767 :
self.AC1 -= 65535
self.AC2 = data[2] * 256 + data[3]
if self.AC2 > 32767 :
self.AC2 -= 65535
self.AC3 = data[4] * 256 + data[5]
if self.AC3 > 32767 :
self.AC3 -= 65535
self.AC4 = data[6] * 256 + data[7]
self.AC5 = data[8] * 256 + data[9]
self.AC6 = data[10] * 256 + data[11]
self.B1 = data[12] * 256 + data[13]
if self.B1 > 32767 :
self.B1 -= 65535
self.B2 = data[14] * 256 + data[15]
if self.B2 > 32767 :
self.B2 -= 65535
self.MB = data[16] * 256 + data[17]
if self.MB > 32767 :
self.MB -= 65535
self.MC = data[18] * 256 + data[19]
if self.MC > 32767 :
self.MC -= 65535
self.MD = data[20] * 256 + data[21]
if self.MD > 32767 :
self.MD -= 65535
pass
def get_measurements(self):
# BMP180 address, 0x77(119)
# Select measurement control register, 0xF4(244)
# 0x2E(46) Enable temperature measurement
self.I2C.writeByte(0x77, 0xF4, 0x2E)
time.sleep(0.5)
# BMP180 address, 0x77(119)
# Read data back from 0xF6(246), 2 bytes
# temp MSB, temp LSB
data = self.I2C.readBytes(0x77, 0xF6, 2)
# Convert the data
temp = data[0] * 256 + data[1]
# Callibration for Temperature
X1 = (temp - self.AC6) * self.AC5 / 32768.0
X2 = (self.MC * 2048.0) / (X1 + self.MD)
B5 = X1 + X2
cTemp = ((B5 + 8.0) / 16.0) / 10.0
time.sleep(0.5)
# BMP180 address, 0x77(119)
# Select measurement control register, 0xF4(244)
# 0x74(116) Enable pressure measurement, OSS = 1
self.I2C.writeByte(0x77, 0xF4, 0x74)
time.sleep(0.5)
# BMP180 address, 0x77(119)
# Read data back from 0xF6(246), 3 bytes
# pres MSB1, pres MSB, pres LSB
data = self.I2C.readBytes(0x77, 0xF6, 3)
# Convert the data
pres = ((data[0] * 65536) + (data[1] * 256) + data[2]) / 128
# Calibration for Pressure
B6 = B5 - 4000
X1 = (self.B2 * (B6 * B6 / 4096.0)) / 2048.0
X2 = self.AC2 * B6 / 2048.0
X3 = X1 + X2
B3 = (((self.AC1 * 4 + X3) * 2) + 2) / 4.0
X1 = self.AC3 * B6 / 8192.0
X2 = (self.B1 * (B6 * B6 / 2048.0)) / 65536.0
X3 = ((X1 + X2) + 2) / 4.0
B4 = self.AC4 * (X3 + 32768) / 32768.0
B7 = ((pres - B3) * (25000.0))
pressure = 0.0
if B7 < 2147483648L :
pressure = (B7 * 2) / B4
else :
pressure = (B7 / B4) * 2
X1 = (pressure / 256.0) * (pressure / 256.0)
X1 = (X1 * 3038.0) / 65536.0
X2 = ((-7357) * pressure) / 65536.0
pressure = (pressure + (X1 + X2 + 3791) / 16.0) / 100
# Calculate Altitude
altitude = 44330 * (1 - ((pressure / 1013.25) ** 0.1903))
return pressure, altitude, cTemp
if __name__ == '__main__':
i2c = onionI2C.OnionI2C()
dev1 = BME280(i2c)
dev2 = BMP180(i2c)
dev1.initialize()
dev2.initialize()
time.sleep(1)
for x in range(0,10):
print "//////////////////////////////////////////"
pressure, humidity, cTemp = dev1.get_measurements()
print "BME280"
print "Pressure : %.2f hPa " %pressure
print "Relative Humidity : %.2f %%" %humidity
print "Temperature in Celsius : %.2f C" %cTemp
time.sleep(.25)
pressure, altitude, cTemp = dev2.get_measurements()
print "BMP180"
print "Pressure : %.2f hPa " %pressure
print "Altitude : %.2f m" %altitude
print "Temperature in Celsius : %.2f C" %cTemp
time.sleep(1)
pass