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EmonHubJeeInterfacer.py
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EmonHubJeeInterfacer.py
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import time
import json
import datetime
import Cargo
import EmonHubSerialInterfacer as ehi
"""class EmonHubJeeInterfacer
Monitors the serial port for data from "Jee" type device
"""
class EmonHubJeeInterfacer(ehi.EmonHubSerialInterfacer):
def __init__(self, name, com_port='/dev/ttyAMA0', com_baud=0):
"""Initialize Interfacer
com_port (string): path to COM port
"""
# Initialization
if com_baud != 0:
super(EmonHubJeeInterfacer, self).__init__(name, com_port, com_baud)
else:
super(EmonHubJeeInterfacer, self).__init__(name, com_port, 38400)
# Display device firmware version and current settings
self.info = ["",""]
if self._ser is not None:
self._ser.write("v")
time.sleep(2)
self._rx_buf = self._rx_buf + self._ser.readline()
if '\r\n' in self._rx_buf:
self._rx_buf=""
info = self._rx_buf + self._ser.readline()[:-2]
if info != "":
# Split the returned "info" string into firmware version & current settings
self.info[0] = info.strip().split(' ')[0]
self.info[1] = info.replace(str(self.info[0]), "")
self._log.info( self.name + " device firmware version: " + self.info[0])
self._log.info( self.name + " device current settings: " + str(self.info[1]))
else:
# since "v" command only v11> recommend firmware update ?
#self._log.info( self.name + " device firmware is pre-version RFM12demo.11")
self._log.info( self.name + " device firmware version & configuration: not available")
else:
self._log.warning("Device communication error - check settings")
self._rx_buf=""
self._ser.flushInput()
# Initialize settings
self._defaults.update({'pause': 'off', 'interval': 0, 'datacode': 'h'})
# This line will stop the default values printing to logfile at start-up
# unless they have been overwritten by emonhub.conf entries
# comment out if diagnosing a startup value issue
self._settings.update(self._defaults)
# Jee specific settings to be picked up as changes not defaults to initialise "Jee" device
self._jee_settings = ({'baseid': '15', 'frequency': '433', 'group': '210', 'quiet': 'True', 'calibration': '230V'})
self._jee_prefix = ({'baseid': 'i', 'frequency': '', 'group': 'g', 'quiet': 'q', 'calibration': 'p'})
# Pre-load Jee settings only if info string available for checks
if all(i in self.info[1] for i in (" i", " g", " @ ", " MHz")):
self._settings.update(self._jee_settings)
def add(self, cargo):
"""Append data to buffer.
data (list): node and values (eg: '[node,val1,val2,...]')
"""
#just send it
txc = self._process_tx(cargo)
self.send(txc)
def read(self):
"""Read data from serial port and process if complete line received.
Return data as a list: [NodeID, val1, val2]
"""
# Read serial RX
self._rx_buf = self._rx_buf + self._ser.readline()
# If line incomplete, exit
if '\r\n' not in self._rx_buf:
return
# Remove CR,LF.
f = self._rx_buf[:-2].strip()
# Reset buffer
self._rx_buf = ''
if not f:
return
if f[0] == '\x01':
#self._log.debug("Ignoring frame consisting of SOH character" + str(f))
return
if f[0] == '?':
self._log.debug("Discarding RX frame 'unreliable content'" + str(f))
return False
# Discard information messages
if '>' in f:
if '->' in f:
self._log.debug("confirmed sent packet size: " + str(f))
return
self._log.debug("acknowledged command: " + str(f))
return
# Record current device settings
if " i" and " g" and " @ " and " MHz" in f:
self.info[1] = f
self._log.debug("device settings updated: " + str(self.info[1]))
return
# Save raw packet to new cargo object
c = Cargo.new_cargo(rawdata=f)
# Convert single string to list of string values
f = f.split(' ')
# Strip leading 'OK' from frame if needed
if f[0]=='OK':
f = f[1:]
# Extract RSSI value if it's available
if str(f[-1])[0]=='(' and str(f[-1])[-1]==')':
r = f[-1][1:-1]
try:
c.rssi = int(r)
except ValueError:
self._log.warning("Packet discarded as the RSSI format is invalid: "+ str(f))
return
f = f[:-1]
try:
# Extract node id from frame
c.nodeid = int(f[0]) + int(self._settings['nodeoffset'])
except ValueError:
return
try:
# Store data as a list of integer values
c.realdata = [int(i) for i in f[1:]]
except ValueError:
return
return c
def set(self, **kwargs):
"""Send configuration parameters to the "Jee" type device through COM port
**kwargs (dict): settings to be modified. Available settings are
'baseid', 'frequency', 'group'. Example:
{'baseid': '15', 'frequency': '4', 'group': '210'}
"""
for key, setting in self._jee_settings.iteritems():
# Decide which setting value to use
if key in kwargs.keys():
setting = kwargs[key]
else:
setting = self._jee_settings[key]
# convert bools to ints
if str.capitalize(str(setting)) in ['True', 'False']:
setting = int(setting == "True")
# confirmation string always contains baseid, group anf freq
if " i" and " g" and " @ " and " MHz" in self.info[1]:
# If setting confirmed as already set, continue without changing
if (self._jee_prefix[key] + str(setting)) in self.info[1].split():
continue
elif key in self._settings and self._settings[key] == setting:
continue
if key == 'baseid' and int(setting) >=1 and int(setting) <=26:
command = str(setting) + 'i'
elif key == 'frequency' and setting in ['433','868','915']:
command = setting[:1] + 'b'
elif key == 'group'and int(setting) >=0 and int(setting) <=250:
command = str(setting) + 'g'
elif key == 'quiet' and int(setting) >=0 and int(setting) <2:
command = str(setting) + 'q'
elif key == 'calibration' and setting == '230V':
command = '1p'
elif key == 'calibration' and setting == '110V':
command = '2p'
else:
self._log.warning("In interfacer set '%s' is not a valid setting for %s: %s" % (str(setting), self.name, key))
continue
self._settings[key] = setting
self._log.info("Setting " + self.name + " %s: %s" % (key, setting) + " (" + command + ")")
self._ser.write(command)
# Wait a sec between two settings
time.sleep(1)
# include kwargs from parent
super(EmonHubJeeInterfacer, self).set(**kwargs)
def action(self):
"""Actions that need to be done on a regular basis.
This should be called in main loop by instantiater.
"""
t = time.time()
# Broadcast time to synchronize emonGLCD
interval = int(self._settings['interval'])
if interval: # A value of 0 means don't do anything
if (t - self._interval_timestamp) > interval:
self._interval_timestamp = t
now = datetime.datetime.now()
self._log.debug(self.name + " broadcasting time: %02d:%02d" % (now.hour, now.minute))
self._ser.write("00,%02d,%02d,00,s" % (now.hour, now.minute))
def _process_post(self, databuffer):
"""Send data to server/broker or other output
"""
for i in range(0,len(databuffer)):
frame = databuffer[i]
self._log.debug("node = " + str(frame[1]) + " node_data = "+json.dumps(frame))
self.send(frame)
return True
def send (self, cargo):
f = cargo
cmd = "s"
if self.getName() in f.encoded:
data = f.encoded[self.getName()]
else:
data = f.realdata
payload = ""
for value in data:
if int(value) < 0 or int(value) > 255:
self._log.warning(self.name + " discarding Tx packet: values out of scope" )
return
payload += str(int(value))+","
payload += cmd
self._log.debug(str(f.uri) + " sent TX packet: " + payload)
self._ser.write(payload)