class Persistence(object):
def __init__(self, logger=None):
if logger == None:
self._logger = Logger("Persistence", Logger.DETAIL)
else:
self._logger = logger
self._activity_type = "Environment_Observation"
self._couch = CouchUtil(self._logger)
#self._sheet = AppendUtil(self._logger)
self._test = False
self._logger.detail("Initialized Persistence")
def save(self, doc, test=False):
'''
Args:
doc: list of attributes, should be of format:
[activity_name, trial, plot, subject, attribute, value, units, participant, status_qualifier, comment]
participant may be a device string, or a list: ['person':'hmw']
Returns:
None
Throws:
None
'''
self._logger.detail("In saveRecord")
# Add a line for each persistence service to be used
# be sure to copy the record so formatting from one
# does not impact another system
self._couch.save(doc.copy())
class AppendUtil(object):
def __init__(self, logger=None):
"""Record optional sensor data
Args:
lvl: Logging level
Returns:
None
Raises:
None
"""
if logger == None:
self._logger = Logger("AppendUtil", Logger.DETAIL)
else:
self._logger = logger
self._sheet_name = '1Mtlr_-yqwdEwXFEcaLoEP01aDN7vvOosDOEerFpDkaI'
self._scope = ['https://www.googleapis.com/auth/spreadsheets']
self._l_util = ListUtil(self._logger)
self._s_util = SheetUtil(self._sheet_name, self._scope, self._logger)
self._logger.debug("Initialized AppendUtil")
def append(self, rec, append_range):
#print(rec)
self._s_util.append(append_range, rec)
def save(self, doc):
'''
This is the entry function into the object
Lookup the range in the dictionary before appending
Save list to Google Sheet
Args:
self
doc - formatted list to save (append)
Returns:
None
Throws:
None
'''
self._logger.detail("In save")
name = doc[0]
self._logger.debug('%s: %s' % ('Rec Type', name))
rec = self._l_util.build(doc)
# dictionary of sheet tabs
range = {
'Environment_Observation': 'Environment!A1',
'State_Change': 'State!A1',
'Agronomic_Activity': 'Agronomic!A1',
'Phenotype_Observation': 'Phenotype!A1'
}
# Lookup range for record type - note this is a lookup on a list of lists
append_range = range[name]
self._logger.debug('%s: %s' % ('Range', append_range))
self._s_util.append(append_range, rec)
class SCD30:
CMD_START_PERIODIC_MEASUREMENT = 0x0010
CMD_STOP_PERIODIC_MEASUREMENT = 0x0104
CMD_READ_MEASUREMENT = 0x0300
CMD_GET_DATA_READY = 0x0202
CMD_SET_MEASUREMENT_INTERVAL = 0x4600
CMD_SET_TEMPERATURE_OFFSET = 0x5403
CMD_SET_ALTITUDE = 0x5102
WORD_LEN = 2
COMMAND_LEN = 2
MAX_BUFFER_WORDS = 24
STATUS_FAIL = 1
STATUS_OK = 0
CO2_DATA_INDEX = 0
TEMP_DATA_INDEX = 1
HUMIDITY_DATA_INDEX = 2
def __init__(self, logger=None):
"""Create sensor object
Args:
None
Returns:
None
Raises:
None
"""
self._addr = addr
self._path = path
self._logger = logger
if logger == None:
self._logger = Logger("SCD30", Logger.INFO)
self._i2c = I2C(path, addr, self._logger)
self._logger.debug("initialize SCD30")
self.start_periodic_measurement()
def start_periodic_measurement(self):
"""Start sensor to generate data (about every 2 seconds
Args:
self:
test: flag for test logic
Returns:
None
Raises:
None
"""
# command 0x0010, altitude 0x03eb, crc_check 0x87
# altitude set to 1003 mb
#msgs = [0x00,0x10, 0x03, 0xeb, 0x87]
# Altitude is currently set to 0
self._logger.debug("In Start Periodic Measurment")
msgs = [0x00,0x10, 0x00, 0x00, 0x81]
self._i2c.msg_write(msgs)
# TESTE ADN WORKS!
def stop_periodic_measurement(self):
"""Stop automatic data gathering
Args:
None
Returns:
None
Raises:
None
"""
self._logger.debug("In Stop Periodic Measurment")
msgs = [0x01,0x14]
self._i2c.msg_write(msgs)
# return self._i2c.msg_write(self.CMD_STOP_PERIODIC_MEASUREMENT
pass
def read_measurement(self):
"""Read data
Args:
self:
test:
Returns:
CO2
Temp
Relative Humidity
Raises:
None
"""
self._logger.debug("In Read Measurment")
self._i2c.msg_write([0x03, 0x00])
msgs = self._i2c.msg_read(18)
data3 = self.bytes_to_value(msgs[0].data)
return data3[self.CO2_DATA_INDEX], data3[self.TEMP_DATA_INDEX], data3[self.HUMIDITY_DATA_INDEX]
def bytes_to_value(self, byte_array):
"""Convert array of byte values into three float values
Args:
self
byte_array: array of data from I2C sensor
test
Returns:
data: array of float values (CO2, Temp, RH)
Raises:
None
"""
self._logger.debug("In Bytes To Value")
# Array for value bytes (exclude crc check byte)
bytes_buf = [0]*12 # 2 words for each co2, temperature, humidity
l = len(bytes_buf)
ld = len(byte_array)
# array for word conversion - two words per value
word_buf = [0]*int(l/2)
# final data structure - one place per value
data = [0]*int(len(word_buf)/2)
# Load bytes_buffer, strip crc bytes
y = 0
for x in range(0, ld, 6):
# print("x: " + str(x) + " y: " + str(y))
bytes_buf[y] = byte_array[x]
bytes_buf[y+1] = byte_array[x+1]
bytes_buf[y+2] = byte_array[x+3]
bytes_buf[y+3] = byte_array[x+4]
y += 4
self._logger.detail("bytes_buf: " + str(bytes_buf))
# Convert sensor data reads to physical value per Sensirion specification
# Load buffer with values
# Cast 4 bytes to one unsigned 32 bit integer
# Cast unsigned 32 bit integer to 32 bit float
# Convert bytes to words
for i in range(len(word_buf)):
word_buf[i] = (bytes_buf[i*2] << 8) | bytes_buf[i*2+1]
self._logger.detail(str(hex(bytes_buf[i])) + " " + str(hex(bytes_buf[i+1])))
self._logger.detail(hex(word_buf[i]))
#convert words to int32
data[self.CO2_DATA_INDEX] = (word_buf[0] << 16) | word_buf[1]
data[self.TEMP_DATA_INDEX] = (word_buf[2] << 16) | word_buf[3]
data[self.HUMIDITY_DATA_INDEX] = (word_buf[4] << 16) | word_buf[5]
#Convert int32 data to float32
floatData = numpy.array(data, dtype=numpy.int32)
data = floatData.view('float32')
self._logger.detail("CO2: " + str(data[self.CO2_DATA_INDEX]))
self._logger.detail("Temp: " + str(data[self.TEMP_DATA_INDEX]))
self._logger.detail("RH: " + str(data[self.HUMIDITY_DATA_INDEX]))
return data
# interval : (u16 integer)
def set_measurement_interval(self, interval_sec):
"""Set frequency of automatic data collectoin
Args:
self
interval_sec: time in seconds
test
Returns:
None
Raises:
None
"""
self._logger.debug("In Set Measurment Interval")
if interval_sec < 2 or interval_sec > 1800:
return self.STATUS_FAIL
# Need to finish this so value is 32 word split to two 16 words
# Calculate crc value for last word
# [Cmd MSB, Cmd LSB, Interval MSB, Interval LSB, CRC]
# msb, lsb = convert_word(interval_sec, test)
# crc = calc_crc(msb, lsb, test)
# msg = [0x46,0x10, msb, lsb, crc]
msgs = [0x46,0x10, 0x00, 0x02, 0xE3]
self._i2c.msg_write(msgs)
def get_data_ready(self):
"""Check if have fresh data from periodic update
Args:
self
test
Returns:
ready flag
Raises:
None
"""
self._logger.debug("In Get Data Ready")
self._i2c.msg_write([0x02, 0x02])
msgs = self._i2c.msg_read(3)
#for msg in msgs:
# self._logger.detail("Msg: " + str(msg))
# for d in msg.data:
# self._logger.detail("Data: " + str(hex(d)))
#self._logger.detail("Data: " + str(msgs[0].data[1]))
return msgs[0].data[1]
# Strange behaviour
def set_temperature_offset(self, temperature_offset):
"""Temperature compensation offset
Args:
self
temperature offset
test
Returns:
None
Raises:
None
"""
self._logger.debug("In Set Temperature Offset")
# Need to finish this so value is 32 word split to two 16 words
# Calculate crc value for last word
# [Cmd MSB, Cmd LSB, Interval MSB, Interval LSB, CRC]
# msb, lsb = convert_word(interval_sec, test)
# crc = calc_crc(msb, lsb, test)
# msg = [0x54,0x03, msb, lsb, crc]
msgs = [0x54,0x03, 0x00, 0x02, 0xE3]
self._i2c.msg_write(msgs)
# TESTE ADN WORKS!
def set_altitude(self, altitude):
"""Altitude compensation
Args:
self
altitude: uint16, height over sea level in [m] above 0
test
Returns:
None
Raises:
None
"""
self._logger.debug("In Set Altitude")
# Need to finish this so value is 32 word split to two 16 words
# Calculate crc value for last word
# [Cmd MSB, Cmd LSB, Interval MSB, Interval LSB, CRC]
# msb, lsb = convert_word(interval_sec, test)
# crc = calc_crc(msb, lsb, test)
# msg = [0x51,0x02, msb, lsb, crc]
msgs = [0x51,0x02, 0x00, 0x02, 0xE3]
self._i2c.msg_write(msgs)
# TESTE ADN WORKS!
def get_configured_address(self, test=False):
"""Altitude compensation
Args:
self
test
Returns:
self._addr: address of the sensor
Raises:
None
"""
self._logger.debug("In Get Configured Address")
return self._addr
def get_data(self):
"""High level logic to simply get data
Args:
self
test
Returns:
co2: co2 value
temp: temperature value
rh: relative humidity value
Raises:
NameError: if error in logic (I2C Problem)
"""
self._logger.debug("In Get Data")
for x in range(0, 4): # Only give four reste tries before giving up
try:
while True:
# Test if data is ready
if self.get_data_ready():
# fetch data
co2, temp, rh = self.read_measurement()
self._logger.detail("CO2: " + str(co2))
self._logger.detail("Temp: " + str(temp))
self._logger.detail("RH: " + str(rh))
return co2, temp, rh
time.sleep(1)
# try reset to see if can recover from errors
except Exception as e:
self._logger.error("{}, {}".format("Data Ready Err: ", e))
self.__init__()
time.sleep(2)
# Give up if cannot fix the problems
raise NameError("Too Many Failures")
class ListUtil(object):
def __init__(self, logger=None):
if logger == None:
self._logger = Logger("ListUtil", Logger.DETAIL)
else:
self._logger = logger
self._logger.detail("Initialize ListUtil")
def build(self, doc):
'''
Convert activity list to list of lists
Args:
doc: list of attributes, should be of format:
[activity_name, trial, plot, subject, attribute, value, units, participant, status_qualifier, comment]
participant may be a device string, or a list: ['person':'hmw']
Returns:
rec: list formatted record ready for the spreadsheet
Throws:
None
'''
# add timestamp and field_id
timestamp = datetime.utcnow()
ts_str = timestamp.isoformat()[:19]
t_str = ts_str.replace('T', ' ')
doc.insert(0, env['field']['field_id'])
doc.insert(0, t_str)
# append date, week of trial
start = env['trials'][0]['start_date']
st = datetime.strptime(start, '%Y-%m-%dT%H:%M:%S')
dif = timestamp - st
# Week of trial
wk = int(math.ceil(dif.days / 7))
# date portion
doc.append(t_str[:10])
# time portion
doc.append(t_str[-8:])
# weeks of trial
doc.append(wk)
# create binned timestamp - time is 20 minute group
ts2 = timestamp.replace(minute=(int(math.floor(timestamp.minute /
20))),
second=0)
ts2_str = ts2.isoformat()[:19]
doc.append(ts2_str)
# fix participant
if isinstance(doc[PARTICIPANT], list):
p_type = doc[PARTICIPANT][0]
p_name = doc[PARTICIPANT][1]
del doc[PARTICIPANT]
doc.insert(PARTICIPANT, p_name)
doc.insert(PARTICIPANT, p_type)
else:
doc.insert(PARTICIPANT, 'device')
# Remove 'Field' from Environment & State
# 'Plot' is used for Location of sensor
self._logger.debug(doc[2])
if doc[2] == 'Environment_Observation':
del doc[3]
if doc[2] == 'State_Change':
del doc[3]
# convert to list of lists
doc2 = [[el] for el in doc]
self._logger.debug(doc2)
return doc2
class Reservoir:
FULL = 0
EMPTY = 1
OK = 2
vol_per_mm = 0.3785 # estimate 1 gal per 10 mm, this is reservoir specific
vol_per_sec = 0.3785 # estimate 100 ml per sec, this is reservoir specific
def __init__(self):
'''Get distances for determining reservoir levels'''
self.res = {'full': full_ec, 'empty': empty_ec, 'timeout': timeout}
self._activity_type = 'Agronomic_Activity'
self._logger = Logger('LogReservoir', Logger.INFO)
self._persist = Persistence(self._logger)
self._logger.detail("Reservoir Initialized")
# flag for testing
self._test = False
def getStatus(self):
"Logic for calling the reservoir full"
self._logger.detail("In getStatus")
ec = self.getEC()
if ec <= full_ec:
self._logger.debug("{}, {}, {:10.1f}".format(
"Reservoir Full", EC, ec))
return Reservoir.FULL, ec
elif ec >= empty_ec:
self._logger.debug("{}, {}, {:10.1f}".format(
"Reservoir Empty", EC, ec))
return Reservoir.EMPTY, ec
else:
self._logger.debug("{}, {}, {:10.1f}".format(
"Reservoir not Empty", EC, ec))
return Reservoir.OK, ec
def isFull(self):
self._logger.detail("In isFull")
status, ec = self.getStatus()
if status == Reservoir.FULL:
return True
else:
return False
def getEC(self):
'''Get EC reading'''
self._logger.detail("In getEC")
snsr = EC(self._logger)
return snsr.getEC()
def fill(self, test=False):
''' Routine to control re-filling of the reservoir'''
self._logger.detail("{}".format("In Fill"))
start_ec = self.getEC()
start_t = time.time()
pump = Pump()
pump.on()
# Loop till filled or times out
while (not self.isFull()) and self.isFilling(start_t):
self._logger.detail("{}".format("In Fill Loop"))
self._logger.detail("{}".format("Exit Fill Loop, close solenoid"))
# Close valve
pump.off()
# Calculate amount filled
stop_t = time.time()
stop_ec = self.getEC()
dif_t = stop_t - start_t
volume = dif_t * self.vol_per_sec
self._logger.detail("{}".format("Exit Fill"))
return volume
def isFilling(self, start_time, test=False):
'''Check that actually filling: the distance is actually changing'''
start_ec = self.getEC()
self._logger.detail("{} {}".format("Filling, Start EC:", start_ec))
time.sleep(fill_time)
# Check for level change first, else will never get to this logic till timeout
end_ec = self.getEC()
change = start_ec - end_ec
if end_ec < start_ec: # need to see at least a 5mm change
self._logger.detail("{} {} {} {} {} {}".format(
"Still Filling, change:", change, "Start", start_ec, "End",
end_ec))
return True
else:
self._logger.detail("{} {} {} {} {} {}".format(
"Not Filling, no change:", change, "Start", start_ec, "End",
end_ec))
return False
# Check for timeout
stop_time = time.time()
if stop_time - start_time > self.res['timeout']:
self._logger.detail("{}".format("Timeout"))
return False
else:
return True
def checkReservoir(self):
'''Check condition of reservoir and fill if necessary'''
self._logger.detail("{}".format("Check Reservoir"))
status, ec = self.getStatus()
self._logger.debug("{} {} {} {}".format("Status:", status, "EC", ec))
# Is full, log state
if status == Reservoir.FULL:
self._logger.detail("{}".format("Status: Full"))
self._logger.info("{} {} {} {}".format("EC:", ec, "Full level:",
self.res['full'], "Empty:",
self.res['empty']))
return True
else:
# Needs filling
self._logger.debug("{}".format("Status: Filling"))
volume = self.fill()
if volume > 0:
# Filled, log volume
self.logState(volume, 'Success')
return True
else:
# Failure
self._logger.debug("{}".format("Status: Failure"))
level = 'Empty'
if status == '2':
level = 'Ok'
self._logger.error("{}".format("Failure to fill Reservoir"))
self._logger.error("{} {} {} {}".format(
"EC:", ec, "Full level:", self.res['full'], "Empty:",
self.res['empty']))
self.logState(volume, 'Failure')
return False
def logState(self, value, status_qualifier):
if self._test:
status_qualifier = 'Test'
txt = {
'Volume': value,
'full_level': self.res['full'],
'empty_level': self.res['empty'],
'status': 'Full'
}
self._persist.save([
'State_Change', '', 'Nutrient', 'Reservoir', 'Volume', value,
'Liter', 'Solenoid', status_qualifier, ''
])
self._logger.info(txt)
class CouchUtil(object):
def __init__(self, logger=None):
if logger == None:
self._logger = Logger("LogSensor", Logger.DETAIL)
else:
self._logger = logger
self._activity_type = "Environment_Observation"
self._logger.detail("CouchUtil")
self._test = False
self._server = Server()
self._db = self._server[db_name]
def processEnv(self, row):
'''
Environment specific processing
Args:
doc: list of attributes, should be of format:
[timestamp, field, activity_name, trial, plot, subject, attribute, value, units, participant, status_qualifier, comment]
participant may be a device string, or a list: ['person':'hmw']
Returns:
rec: json formatted record ready for the database
Throws:
None
'''
rec = self.buildCore(row)
rec['activity_type'] = row[ACTIVITY]
rec['subject'] = {
'name': row[SUBJECT],
'attribute': {
'name': row[ATTRIBUTE],
'units': row[UNITS],
'value': row[VALUE]
},
'location': row[PLOT]
}
rec['location'] = {'field': row[FIELD]}
return rec
def processState(self, row):
'''
State specific processing
Args:
doc: list of attributes, should be of format:
[timestamp, field, activity_name, trial, plot, subject, attribute, value, units, participant, status_qualifier, comment]
participant may be a device string, or a list: ['person':'hmw']
Returns:
rec: json formatted record ready for the database
Throws:
None
'''
self._logger.detail("In State_Change")
rec = self.buildCore(row)
rec['activity_type'] = row[ACTIVITY]
self._logger.detail("Activity: " + str(rec['activity_type']))
rec['subject'] = {
'name': row[SUBJECT],
'attribute': {
'name': row[ATTRIBUTE],
'units': row[UNITS],
'value': row[VALUE]
},
'location': row[PLOT]
}
self._logger.detail("Subject: " + str(rec['subject']))
rec['participant'] = {'type': 'device', 'name': row[PARTICIPANT]}
rec['location'] = {'field': row[FIELD]}
self._logger.detail(str(rec))
return rec
def processAgro(self, row):
'''
Agronomic specific processing
Args:
doc: list of attributes, should be of format:
[timestamp, field, activity_name, trial, plot, subject, attribute, value, units, participant, status_qualifier, comment]
participant may be a device string, or a list: ['person':'hmw']
Returns:
rec: json formatted record ready for the database
Throws:
None
'''
self._logger.detail("In Process Agro")
rec = self.buildCore(row)
rec['activity_type'] = row[ACTIVITY]
rec['sub-activity'] = row[PLOT]
if len(row[SUBJECT]) > 0:
rec['subject'] = {
'name': row[SUBJECT],
'attribute': {
'name': row[ATTRIBUTE],
'units': row[UNITS],
'value': row[VALUE]
}
}
rec['location'] = {'field': row[FIELD], 'trial': row[TRIAL]}
return rec
def processPheno(self, row):
'''
Phenotype specific processing
Args:
doc: list of attributes, should be of format:
[timestamp, field, activity_name, trial, plot, subject, attribute, value, units, participant, status_qualifier, comment]
participant may be a device string, or a list: ['person':'hmw']
Returns:
rec: json formatted record ready for the database
Throws:
None
'''
self._logger.detail("In Process Pheno")
rec = self.buildCore(row)
rec['activity_type'] = row[ACTIVITY]
rec['subject'] = {
'name': row[SUBJECT],
'attribute': {
'name': row[ATTRIBUTE],
'units': row[UNITS],
'value': row[VALUE]
}
}
rec['location'] = {
'field': row[FIELD],
'trial': row[TRIAL],
'plot': row[PLOT]
}
return rec
def buildCore(self, row):
'''
Build the core of the json structure, common elements
Args:
row: list of activity
[timestamp, field, activity_name, trial, plot, subject, attribute, value, units, participant, status_qualifier, comment]
participant may be a device string, or a list: ['person':'hmw']
Returns:
rec: json formatted record ready for the database
Throws:
None
'''
self._logger.detail("In buildCore")
rec = {}
rec['start_date'] = {'timestamp': row[TS]}
if isinstance(row[PARTICIPANT], list):
rec['participant'] = {
'type': row[PARTICIPANT][0],
'name': row[PARTICIPANT][1]
}
else:
rec['participant'] = {'type': 'device', 'name': row[PARTICIPANT]}
if len(row[COMMENT]) == 0:
rec['status'] = {
'status': 'Complete',
'status_qualifier': row[STATUS]
}
else:
rec['status'] = {
'status': 'Complete',
'status_qualifier': row[STATUS],
'comment': row[COMMENT]
}
if row[STATUS] == "Success":
self._logger.detail(rec)
elif row[STATUS] == "Failure":
self._logger.error("Failure" + str(rec))
elif row[STATUS] == "Test":
self._logger.detail(rec)
else:
self._logger.error("Unknown Status" + str(rec))
return rec
def save(self, doc, test=False):
'''
Convert activity list to json structure and save to database
This is the entry point for all other functions
Args:
doc: list of attributes, should be of format:
[activity_name, trial, plot, subject, attribute, value, units, participant, status_qualifier, comment]
participant may be a device string, or a list: ['person':'hmw']
Returns:
rec: json formatted record ready for the database
Throws:
None
'''
self._logger.detail("In saveList")
# dictionary of activity types and specific processing functions
proc = {
'Environment_Observation': self.processEnv,
'State_Change': self.processState,
'Agronomic_Activity': self.processAgro,
'Phenotype_Observation': self.processPheno
}
# add timestamp and field_id
timestamp = datetime.utcnow().isoformat()[:19]
doc.insert(0, env['field']['field_id'])
doc.insert(0, timestamp)
# Use activity type to route processing
rec = proc[doc[2]](doc)
self.saveRec(rec, test)
def saveRec(self, rec, test=False):
'''
Persist json structure to a database
Args:
rec: json structure
Returns:
id: document id
rev: revision number of document
Throws:
None
'''
# print rec
id, rev = self._db.save(rec)
class I2C(object):
def __init__(self, path, addr, logger=None):
self._path = path
self._addr = addr
self._i2c = pI2C(self._path)
self._logger = logger
if logger == None:
self._logger = Logger("SCD30", Logger.INFO)
self._logger.debug("initialize I2C object")
def __exit__(self, exc_type, exc_value, traceback):
self._i2c.close()
def msg_write(self, cmds):
"""Write to sensor
Args:
cmds: commands to send
Returns:
msgs: basically returns the cmds, since nothing altered
Raises:
None
"""
self._logger.debug("In Msg Write")
for cmd in cmds:
self._logger.detail("{}, {}".format("Cmd: ", cmd))
msgs = [self._i2c.Message(cmds)]
try:
self._logger.detail("Transfer")
self._i2c.transfer(self._addr, msgs)
msb = msgs[0].data[0]
self._logger.detail("{}, {}".format("MSB: ", hex(msb)))
return msgs
except Exception as e:
self._logger.error(str(e))
return None
def msg_read(self, size, cmds=None):
"""Read existing data
Args:
cmds: addresses to read from - optional for some sensors (SI7021)
size: size of byte array for receiving data
Returns:
msgs: message package, last one should hold data
Raises:
None
"""
self._logger.detail("{}, {}, {}, {}".format("Msg Read - size: ", size,
" cmds: ", cmds))
sz = self._i2c.Message(bytearray([0x00 for x in range(size)]),
read=True)
msgs = [sz]
# print("C " + str(type(cmds)))
if cmds is not None:
# print("Cmds " + str(cmds))
rd = self._i2c.Message(cmds)
msgs = [rd, sz]
try:
self._i2c.transfer(self._addr, msgs)
return msgs
except Exception as e:
self._logger.error(str(e))
return None
def get_data(self, cmd, sleep, size, read=None):
'''Combine sending of command and reading
Some sensors default the read to the prior command and don't specify a read address
'''
self._logger.debug("{}, {}, {}, {}, {}, {}".format(
"In Get Data-cmd: ", cmd, " sleep: ", sleep, " size: ", size))
self.msg_write(cmd)
time.sleep(sleep)
msgs = self.msg_read(size, read)
if msgs == None:
return None
else:
for msg in msgs:
self._logger.detail("-")
for dt in msg.data:
self._logger.detail("Dt " + str(dt))
self._logger.debug("Data " + str(msgs[0].data[0]) + " " +
str(msgs[0].data[1]))
value = self.bytesToWord(msgs[0].data[0], msgs[0].data[1])
return msgs
def bytesToWord(self, high, low):
"""Convert two byte buffers into a single word value
shift the first byte into the work high position
then add the low byte
Args:
high: byte to move to high position of word
low: byte to place in low position of word
Returns:
word: the final value
Raises:
None
"""
self._logger.debug("{}, {}, {}, {}".format("In Bytes To Word-high: ",
high, " Low: ", low))
word = (high << 8) + low
return word