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read_energy_meter.py
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read_energy_meter.py
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#!/usr/bin/env python3
from influxdb_client import InfluxDBClient
from influxdb_client.client.write_api import SYNCHRONOUS
from datetime import datetime, timedelta
from os import path
import sys
import os
import serial
import time
import yaml
import logging
import modbus_tk
import modbus_tk.defines as cst
from modbus_tk import modbus_rtu
from modbus_tk import modbus_tcp
PORT = 'COM3'
#PORT = '/dev/ttyUSB0'
#PORT = '/dev/serial/by-id/usb-1a86_USB2.0-Serial-if00-port0'
# Change working dir to the same dir as this script
os.chdir(sys.path[0])
class DataCollector:
def __init__(self, influx_yaml, meter_yaml):
self.influx_yaml = influx_yaml
self.influx_map = None
self.influx_map_last_change = -1
self.influx_inteval_save = dict()
log.info('InfluxDB:')
for influx_config in sorted(self.get_influxdb(), key=lambda x:sorted(x.keys())):
log.info('\t {} <--> {} , Interval: {}'.format(influx_config['url'], influx_config['name'], influx_config['interval']))
self.meter_yaml = meter_yaml
self.max_iterations = None # run indefinitely by default
self.meter_map = None
self.meter_map_last_change = -1
log.info('Meters:')
for meter in sorted(self.get_meters(), key=lambda x:sorted(x.keys())):
log.info('\t {} <--> {}'.format( meter['id'], meter['name']))
def get_meters(self):
assert path.exists(self.meter_yaml), 'Meter map not found: %s' % self.meter_yaml
if path.getmtime(self.meter_yaml) != self.meter_map_last_change:
try:
log.info('Reloading meter map as file changed')
new_map = yaml.load(open(self.meter_yaml), Loader=yaml.FullLoader)
self.meter_map = new_map['meters']
self.meter_map_last_change = path.getmtime(self.meter_yaml)
except Exception as e:
log.warning('Failed to re-load meter map, going on with the old one.')
log.warning(e)
return self.meter_map
def get_influxdb(self):
assert path.exists(self.influx_yaml), 'InfluxDB map not found: %s' % self.influx_yaml
if path.getmtime(self.influx_yaml) != self.influx_map_last_change:
try:
log.info('Reloading influxDB map as file changed')
new_map = yaml.load(open(self.influx_yaml), Loader=yaml.FullLoader)
self.influx_map = new_map['influxdb']
self.influx_map_last_change = path.getmtime(self.influx_yaml)
list = 0
for influx_config in sorted(self.get_influxdb(), key=lambda x:sorted(x.keys())):
list = list + 1
self.influx_inteval_save[list] = influx_config['interval']
except Exception as e:
log.warning('Failed to re-load influxDB map, going on with the old one.')
log.warning(e)
return self.influx_map
def collect_and_store(self):
meters = self.get_meters()
influxdb = self.get_influxdb()
t_utc = datetime.utcnow()
t_str = t_utc.isoformat() + 'Z'
datas = dict()
meter_id_name = dict() # mapping id to name
meter_slave_id = dict()
list = 0 # mapping list to id
for meter in meters:
list = list + 1
meter_id_name[list] = meter['name']
meter_slave_id[list] = meter['id']
try:
if meter['conexion'] == 'R':
masterRTU = modbus_rtu.RtuMaster(
serial.Serial(port=PORT, baudrate=meter['baudrate'], bytesize=meter['bytesize'], parity=meter['parity'], stopbits=meter['stopbits'], xonxoff=0)
)
masterRTU.set_timeout(meter['timeout'])
masterRTU.set_verbose(True)
log.debug('Reading meter %s.' % (meter['name']))
start_time = time.time()
parameters = yaml.load(open(meter['type']), Loader=yaml.FullLoader)
datas[list] = dict()
for parameter in parameters:
# If random readout errors occour, e.g. CRC check fail, test to uncomment the following row
time.sleep(0.15) # Sleep for 150 ms between each parameter read to avoid errors
retries = 3
while retries > 0:
try:
retries -= 1
if meter['function'] == 3:
if parameters[parameter][2] == 1:
resultado = masterRTU.execute(meter['id'], cst.READ_HOLDING_REGISTERS, parameters[parameter][0], parameters[parameter][1], data_format='>f')
elif parameters[parameter][2] == 2:
resultado = masterRTU.execute(meter['id'], cst.READ_HOLDING_REGISTERS, parameters[parameter][0], parameters[parameter][1], data_format='>l')
elif parameters[parameter][2] == 3:
resultado = masterRTU.execute(meter['id'], cst.READ_HOLDING_REGISTERS, parameters[parameter][0], parameters[parameter][1])
elif parameters[parameter][2] == 4:
resultadoTemp = masterRTU.execute(meter['id'], cst.READ_HOLDING_REGISTERS, parameters[parameter][0], parameters[parameter][1])
resultado = [0,0]
resultado[0] = (resultadoTemp[1]<<16)|resultadoTemp[0]
elif parameters[parameter][2] == 5:
resultado = masterRTU.execute(meter['id'], cst.READ_HOLDING_REGISTERS, parameters[parameter][0], parameters[parameter][1], data_format='>I')
elif parameters[parameter][2] == 6:
resultado = masterRTU.execute(meter['id'], cst.READ_HOLDING_REGISTERS, parameters[parameter][0], parameters[parameter][1], data_format='>L')
elif meter['function'] == 4:
if parameters[parameter][2] == 1:
resultado = masterRTU.execute(meter['id'], cst.READ_INPUT_REGISTERS, parameters[parameter][0], parameters[parameter][1], data_format='>f')
elif parameters[parameter][2] == 2:
resultado = masterRTU.execute(meter['id'], cst.READ_INPUT_REGISTERS, parameters[parameter][0], parameters[parameter][1], data_format='>l')
elif parameters[parameter][2] == 3:
resultado = masterRTU.execute(meter['id'], cst.READ_INPUT_REGISTERS, parameters[parameter][0], parameters[parameter][1])
elif parameters[parameter][2] == 4:
resultadoTemp = masterRTU.execute(meter['id'], cst.READ_INPUT_REGISTERS, parameters[parameter][0], parameters[parameter][1])
resultado = [0,0]
resultado[0] = (resultadoTemp[1]<<16)|resultadoTemp[0]
elif parameters[parameter][2] == 5:
resultado = masterRTU.execute(meter['id'], cst.READ_INPUT_REGISTERS, parameters[parameter][0], parameters[parameter][1], data_format='>I')
elif parameters[parameter][2] == 6:
resultado = masterRTU.execute(meter['id'], cst.READ_INPUT_REGISTERS, parameters[parameter][0], parameters[parameter][1], data_format='>L')
datas[list][parameter] = resultado[0]
retries = 0
pass
except ValueError as ve:
log.warning('Value Error while reading register {} from meter {}. Retries left {}.'
.format(parameters[parameter], meter['id'], retries))
log.error(ve)
# if retries == 0:
# raise RuntimeError
except TypeError as te:
log.warning('Type Error while reading register {} from meter {}. Retries left {}.'
.format(parameters[parameter], meter['id'], retries))
log.error(te)
# if retries == 0:
# raise RuntimeError
except IOError as ie:
log.warning('IO Error while reading register {} from meter {}. Retries left {}.'
.format(parameters[parameter], meter['id'], retries))
log.error(ie)
# if retries == 0:
# raise RuntimeError
except:
log.error("Unexpected error:", sys.exc_info()[0])
# raise
datas[list]['ReadTime'] = time.time() - start_time
del masterRTU;
elif meter['conexion'] == 'T':
masterTCP = modbus_tcp.TcpMaster(host=meter['direction'],port=meter['port'])
masterTCP.set_timeout(meter['timeout'])
log.debug('Reading meter %s.' % (meter['name']))
start_time = time.time()
parameters = yaml.load(open(meter['type']), Loader=yaml.FullLoader)
datas[list] = dict()
for parameter in parameters:
# If random readout errors occour, e.g. CRC check fail, test to uncomment the following row
time.sleep(0.15) # Sleep for 150 ms between each parameter read to avoid errors
retries = 3
while retries > 0:
try:
retries -= 1
if meter['function'] == 3:
if parameters[parameter][2] == 1:
resultado = masterTCP.execute(meter['id'], cst.READ_HOLDING_REGISTERS, parameters[parameter][0], parameters[parameter][1], data_format='>f')
elif parameters[parameter][2] == 2:
resultado = masterTCP.execute(meter['id'], cst.READ_HOLDING_REGISTERS, parameters[parameter][0], parameters[parameter][1], data_format='>l')
elif parameters[parameter][2] == 3:
resultado = masterTCP.execute(meter['id'], cst.READ_HOLDING_REGISTERS, parameters[parameter][0], parameters[parameter][1])
elif parameters[parameter][2] == 4:
resultadoTemp = masterTCP.execute(meter['id'], cst.READ_HOLDING_REGISTERS, parameters[parameter][0], parameters[parameter][1])
resultado = [0,0]
resultado[0] = (resultadoTemp[1]<<16)|resultadoTemp[0]
elif parameters[parameter][2] == 5:
resultado = masterTCP.execute(meter['id'], cst.READ_HOLDING_REGISTERS, parameters[parameter][0], parameters[parameter][1], data_format='>I')
elif parameters[parameter][2] == 6:
resultado = masterTCP.execute(meter['id'], cst.READ_HOLDING_REGISTERS, parameters[parameter][0], parameters[parameter][1], data_format='>L')
elif meter['function'] == 4:
if parameters[parameter][2] == 1:
resultado = masterTCP.execute(meter['id'], cst.READ_INPUT_REGISTERS, parameters[parameter][0], parameters[parameter][1], data_format='>f')
elif parameters[parameter][2] == 2:
resultado = masterTCP.execute(meter['id'], cst.READ_INPUT_REGISTERS, parameters[parameter][0], parameters[parameter][1], data_format='>l')
elif parameters[parameter][2] == 3:
resultado = masterTCP.execute(meter['id'], cst.READ_INPUT_REGISTERS, parameters[parameter][0], parameters[parameter][1])
elif parameters[parameter][2] == 4:
resultadoTemp = masterTCP.execute(meter['id'], cst.READ_INPUT_REGISTERS, parameters[parameter][0], parameters[parameter][1])
resultado = [0,0]
resultado[0] = (resultadoTemp[1]<<16)|resultadoTemp[0]
elif parameters[parameter][2] == 5:
resultado = masterTCP.execute(meter['id'], cst.READ_INPUT_REGISTERS, parameters[parameter][0], parameters[parameter][1], data_format='>I')
elif parameters[parameter][2] == 6:
resultado = masterTCP.execute(meter['id'], cst.READ_INPUT_REGISTERS, parameters[parameter][0], parameters[parameter][1], data_format='>L')
datas[list][parameter] = resultado[0]
retries = 0
pass
except ValueError as ve:
log.warning('Value Error while reading register {} from meter {}. Retries left {}.'
.format(parameters[parameter], meter['id'], retries))
log.error(ve)
# if retries == 0:
# raise RuntimeError
except TypeError as te:
log.warning('Type Error while reading register {} from meter {}. Retries left {}.'
.format(parameters[parameter], meter['id'], retries))
log.error(te)
# if retries == 0:
# raise RuntimeError
except IOError as ie:
log.warning('IO Error while reading register {} from meter {}. Retries left {}.'
.format(parameters[parameter], meter['id'], retries))
log.error(ie)
# if retries == 0:
# raise RuntimeError
except:
log.error("Unexpected error:", sys.exc_info()[0])
# raise
datas[list]['ReadTime'] = time.time() - start_time
del masterTCP;
except modbus_tk.modbus.ModbusError as exc:
log.error("%s- Code=%d", exc, exc.get_exception_code())
json_body = [
{
'measurement': meter_id_name[meter_id],
'tags': {
'id': meter_slave_id[meter_id],
# 'meter': meter_id_name[meter_id],
},
'time': t_str,
'fields': datas[meter_id]
}
for meter_id in datas
]
if len(json_body) > 0:
# log.debug(json_body)
list = 0
for influx_config in influxdb:
list = list + 1
if self.influx_inteval_save[list] > 0:
if self.influx_inteval_save[list] <= 1:
self.influx_inteval_save[list] = influx_config['interval']
try:
DBclient = InfluxDBClient(url=influx_config['url'], token=influx_config['token'], org=influx_config['org'])
write_api = DBclient.write_api(write_options=SYNCHRONOUS)
write_api.write(bucket=influx_config['dbname'],org=influx_config['org'],record=json_body)
log.info(t_str + ' Data written for %d meters in {}.' .format(influx_config['name']) % len(json_body) )
except Exception as e:
log.error('Data not written! in {}' .format(influx_config['name']))
log.error(e)
raise
else:
self.influx_inteval_save[list] = self.influx_inteval_save[list] - 1
else:
log.warning(t_str, 'No data sent.')
def repeat(interval_sec, max_iter, func, *args, **kwargs):
from itertools import count
import time
starttime = time.time()
for i in count():
if interval_sec > 0:
time.sleep(interval_sec - ((time.time() - starttime) % interval_sec))
if i % 1000 == 0:
log.info('Collected %d readouts' % i)
try:
func(*args, **kwargs)
except Exception as ex:
log.error(ex)
if max_iter and i >= max_iter:
return
if __name__ == '__main__':
import argparse
parser = argparse.ArgumentParser()
parser.add_argument('--interval', default=60,
help='Meter readout interval (seconds), default 60')
parser.add_argument('--meters', default='meters.yml',
help='YAML file containing Meter ID, name, type etc. Default "meters.yml"')
parser.add_argument('--influxdb', default='influx_config.yml',
help='YAML file containing Influx Host, port, user etc. Default "influx_config.yml"')
parser.add_argument('--log', default='CRITICAL',
help='Log levels, DEBUG, INFO, WARNING, ERROR or CRITICAL')
parser.add_argument('--logfile', default='',
help='Specify log file, if not specified the log is streamed to console')
args = parser.parse_args()
interval = int(args.interval)
loglevel = args.log.upper()
logfile = args.logfile
# Setup logging
log = logging.getLogger('energy-logger')
log.setLevel(getattr(logging, loglevel))
if logfile:
loghandle = logging.FileHandler(logfile, 'w')
formatter = logging.Formatter('%(asctime)s - %(levelname)s - %(message)s')
loghandle.setFormatter(formatter)
else:
loghandle = logging.StreamHandler()
log.addHandler(loghandle)
log.info('Started app')
collector = DataCollector(influx_yaml=args.influxdb,
meter_yaml=args.meters)
repeat(interval,
max_iter=collector.max_iterations,
func=lambda: collector.collect_and_store())