__email__ = "*****@*****.**" Trigger_Ff=port.PE8 Echo_Ff=port.PE9 Trigger_Fr=port.PB4 Echo_Fr=port.PB3 Trigger_Fb=port.PC6 Echo_Fb=port.PC5 Trigger_Fl=port.PE10 Echo_Fl=port.PE11 gpio.init() gpio.setcfg(Trigger_Ff,gpio.OUTPUT) gpio.setcfg(Echo_Ff,gpio.INPUT) gpio.setcfg(Trigger_Fr,gpio.OUTPUT) gpio.setcfg(Echo_Fr,gpio.INPUT) gpio.setcfg(Trigger_Fb,gpio.OUTPUT) gpio.setcfg(Echo_Fb,gpio.INPUT) gpio.setcfg(Trigger_Fl,gpio.OUTPUT) gpio.setcfg(Echo_Fl,gpio.INPUT) def front(): gpio.output(Trigger_Ff,0) # Set Trigger LOW
from pyA13.gpio import port
__author__ = "David Cotterill-Drew"
__copyright__ = "Copyright 2014, RoboTonics"
__credits__ = ["David Cotterill-Drew"]
__license__ = "GPL"
__version__ = "2.0"
__maintainer__ = __author__
__email__ = "*****@*****.**"
LEDR = port.PE6
LEDL = port.PC11
LEDIRR = port.PE7
LEDIRL = port.PC10
gpio.init()
gpio.setcfg(LEDR, gpio.OUTPUT)
gpio.setcfg(LEDL, gpio.OUTPUT)
gpio.setcfg(LEDIRR, gpio.OUTPUT)
gpio.setcfg(LEDIRL, gpio.OUTPUT)
def ledr_on():
gpio.output(LEDR, 1)
def ledl_on():
gpio.output(LEDL, 1)
def ledr_off():
def DHT11Measures():
# --------------------------------------
# initialisation
# refer to the tutorial for more information about the
# GPIO pins in the A13-SOM-LTE
sensor = port.PE11
gpio.init()
# --------------------------------------
# trigger measure
gpio.setcfg(sensor, gpio.OUTPUT)
gpio.output(sensor, 1)
time.sleep(0.025)
gpio.output(sensor, 0)
time.sleep(0.02)
# ----------------------------------------
# grab data
gpio.setcfg(sensor, gpio.INPUT)
data = []
bit_count = 0
tmp = 0
count = 0
HumidityBit = "0"
TemperatureBit = ""
crc = ""
threshold = 9
for i in range(0, 1500):
data.append(gpio.input(sensor))
# print(data)
# --------------------------------------------
# treat data to extract the values
def bin2dec(string_num):
return str(int(string_num, 2))
try:
# You may need to add this to your code, as normally the sensor
# starts by sending a short sequence of 0s then another short
# sequence of 1s to show it is available before sending the
# metrics data, as I could not see this in my data I just did not
# use this code
# Code
# if data[count] == 0:
# while data[count] == 0:
# count += 1
# while data[count] == 1:
# tmp = 1
# count += 1
# End of code
# The first bit of data being normally truncated and as it is a zero for sure
# (humidity is always under 100%) then we directly put a 0 in HumidityBit and we read
# the next 31 bits which are structured as follows :
# Humidity (7bits) - 0 byte - Temperature (8bits) - 0
for i in range(0, 31):
bit_count = 0
while data[count] == 0:
tmp = 1
count += 1
while data[count] == 1:
bit_count += 1
count += 1
if bit_count > threshold:
if 0 <= i < 7:
HumidityBit += "1"
if 15 <= i < 23:
TemperatureBit += "1"
else:
if 0 <= i < 7:
HumidityBit += "0"
if 15 <= i < 23:
TemperatureBit += "0"
except Exception as e:
print(e)
print("A problem occurred during data gathering")
exit(0)
# the next 8 bits encode CRC which is equal to the sum of
# the temperature value and the humidity value
try:
for i in range(0, 8):
bit_count = 0
while data[count] == 0:
tmp = 1
count += 1
while data[count] == 1:
bit_count += 1
count += 1
if bit_count > threshold:
crc += "1"
else:
crc += "0"
except Exception as e:
print(e)
print("A problem occurred during CRC calculation")
exit(0)
Humidity = bin2dec(HumidityBit)
Temperature = bin2dec(TemperatureBit)
# --------------------------------------
# Check CRC is correct then print results
if int(Humidity) + int(Temperature) - int(bin2dec(crc)) == 0:
return ("Humidity = " + Humidity + "%"), ("Temperature = " + Temperature + "C")
else:
print("Wrong data, incorrect CRC")
return None
