This repository has been archived by the owner on Sep 30, 2024. It is now read-only.
forked from peterh/pyobd
-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathobd_sensors.py
182 lines (153 loc) · 6.99 KB
/
obd_sensors.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
#!/usr/bin/python3
###########################################################################
# obd_sensors.py
#
# Copyright 2004 Donour Sizemore ([email protected])
# Copyright 2009 Secons Ltd. (www.obdtester.com)
#
# This file is part of pyOBD.
#
# pyOBD is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# pyOBD is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with pyOBD; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
###########################################################################
# def hex_to_int(str): # newer calls implemented in all methods, should never be called anymore
# i = eval("0x" + str, {}, {})
# return i
def maf(code):
code = int(code, 16)
return code * 0.00132276
def throttle_pos(code):
code = int(code, 16)
return code# * 100.0 / 255.0
def intake_m_pres(code): # in kPa
code = int(code, 16)
return code / 0.14504
def rpm(code):
code = int(code, 16)
return code / 4
def speed(code):
code = int(code, 16)
return code #/ 1.609
def percent_scale(code):
code = int(code, 16)
return code #* 100.0 / 255.0
def timing_advance(code):
code = int(code, 16)
return (code - 128) / 2.0
def sec_to_min(code):
code = int(code, 16)
return code / 60
def temp(code):
code = int(code, 16)
c = code - 40
return 32 + (9 * c / 5)
def cpass(code):
#fixme
return code
def fuel_trim_percent(code):
code = int(code, 16)
return (code - 128) * 100 / 128
def dtc_decrypt(code):
#first byte is byte after PID and without spaces
num = int(code[:2], 16) #A byte
res = []
if num & 0x80: # is mil light on
mil = 1
else:
mil = 0
# bit 0-6 are the number of dtc's.
num = num & 0x7f
res.append(num)
res.append(mil)
numB = hex_to_int(code[2:4]) #B byte
for i in range(0,3):
res.append(((numB>>i)&0x01)+((numB>>(3+i))&0x02))
numC = int(code[4:6], 16) #C byte
numD = int(code[6:8], 16) #D byte
for i in range(0,7):
res.append(((numC>>i)&0x01)+(((numD>>i)&0x01)<<1))
res.append(((numD>>7)&0x01)) #EGR SystemC7 bit of different
#return res
return "#"
def hex_to_bitstring(str): # shouldnt be used anymore, more pythonic ways
bitstring = ""
for i in str:
# silly type safety, we don't want to eval random stuff
if type(i) == type(''):
v = eval("0x%s" % i)
if v & 8 :
bitstring += '1'
else:
bitstring += '0'
if v & 4:
bitstring += '1'
else:
bitstring += '0'
if v & 2:
bitstring += '1'
else:
bitstring += '0'
if v & 1:
bitstring += '1'
else:
bitstring += '0'
return bitstring
class Sensor:
def __init__(self, shortName, sensorName, sensorcommand, sensorValueFunction, u):
self.shortname = shortName
self.name = sensorName
self.cmd = sensorcommand
self.value= sensorValueFunction
self.unit = u
SENSORS = [
Sensor("pids" , "Supported PIDs" , "0100" , hex_to_bitstring ,"" ),
Sensor("dtc_status" , "S-S DTC Cleared" , "0101" , dtc_decrypt ,"" ),
Sensor("dtc_ff" , "DTC C-F-F" , "0102" , cpass ,"" ),
Sensor("fuel_status" , "Fuel System Stat" , "0103" , cpass ,"" ),
Sensor("load" , "Calc Load Value" , "01041", percent_scale ,"" ),
Sensor("temp" , "Coolant Temp" , "0105" , temp ,"F" ),
Sensor("short_term_fuel_trim_1", "S-T Fuel Trim" , "0106" , fuel_trim_percent,"%" ),
Sensor("long_term_fuel_trim_1" , "L-T Fuel Trim" , "0107" , fuel_trim_percent,"%" ),
Sensor("short_term_fuel_trim_2", "S-T Fuel Trim" , "0108" , fuel_trim_percent,"%" ),
Sensor("long_term_fuel_trim_2" , "L-T Fuel Trim" , "0109" , fuel_trim_percent,"%" ),
Sensor("fuel_pressure" , "FuelRail Pressure" , "010A" , cpass ,"" ),
Sensor("manifold_pressure" , "Intk Manifold" , "010B" , intake_m_pres ,"psi" ),
Sensor("rpm" , "Engine RPM" , "010C1", rpm ,"" ),
Sensor("speed" , "Vehicle Speed" , "010D1", speed ,"MPH" ),
Sensor("timing_advance" , "Timing Advance" , "010E" , timing_advance ,"degrees"),
Sensor("intake_air_temp" , "Intake Air Temp" , "010F" , temp ,"F" ),
Sensor("maf" , "AirFlow Rate(MAF)" , "0110" , maf ,"lb/min" ),
Sensor("throttle_pos" , "Throttle Position" , "01111", throttle_pos ,"%" ),
Sensor("secondary_air_status" , "2nd Air Status" , "0112" , cpass ,"" ),
Sensor("o2_sensor_positions" , "Loc of O2 sensors" , "0113" , cpass ,"" ),
Sensor("o211" , "O2 Sensor: 1 - 1" , "0114" , fuel_trim_percent,"%" ),
Sensor("o212" , "O2 Sensor: 1 - 2" , "0115" , fuel_trim_percent,"%" ),
Sensor("o213" , "O2 Sensor: 1 - 3" , "0116" , fuel_trim_percent,"%" ),
Sensor("o214" , "O2 Sensor: 1 - 4" , "0117" , fuel_trim_percent,"%" ),
Sensor("o221" , "O2 Sensor: 2 - 1" , "0118" , fuel_trim_percent,"%" ),
Sensor("o222" , "O2 Sensor: 2 - 2" , "0119" , fuel_trim_percent,"%" ),
Sensor("o223" , "O2 Sensor: 2 - 3" , "011A" , fuel_trim_percent,"%" ),
Sensor("o224" , "O2 Sensor: 2 - 4" , "011B" , fuel_trim_percent,"%" ),
Sensor("obd_standard" , "OBD Designation" , "011C" , cpass ,"" ),
Sensor("o2_sensor_position_b" , "Loc of O2 sensor" , "011D" , cpass ,"" ),
Sensor("aux_input" , "Aux input status" , "011E" , cpass ,"" ),
Sensor("engine_time" , "Engine Start MIN" , "011F" , sec_to_min ,"min" ),
Sensor("engine_mil_time" , "Engine Run MIL" , "014D" , sec_to_min ,"min" ),
]
#___________________________________________________________
def test():
for i in SENSORS:
print(i.name, i.value("F"))
if __name__ == "__main__":
test()