Well for two nights I've tried this and it is clear that I just can't
figure it out and the doc isn't too clear for me. If someone could help me
get moving again, I'd really appreciate it.
I have put a file called Raspberry_Pi.py in /usr
pi@wx-rpi:/usr $ ls -l Rasp*
-rw-r--r-- 1 pi pi 2664 Jun 20 21:17 Raspberry_Pi.py
I have what I believe is the proper code in the config file. Under Station
I have:
station_type = Raspberry_Pi
Then I have:
[Raspberry_Pi]
loop_interval = 5
driver = usr.Raspberry_Pi
When I start it, this is in the log:
Jun 20 21:17:30 wx-rpi systemd[1]: Starting LSB: weewx weather system...
Jun 20 21:17:30 wx-rpi weewx[24463]: engine: Initializing weewx version 3.7.
1
Jun 20 21:17:30 wx-rpi weewx[24463]: engine: Using Python 2.7.9 (default,
Sep 17 2016, 20:26:04) #012[GCC 4.9.2]
Jun 20 21:17:30 wx-rpi weewx[24463]: engine: Platform Linux-4.9.24-v7+-
armv7l-with-debian-8.0
Jun 20 21:17:30 wx-rpi weewx[24463]: engine: Locale is 'en_US.UTF-8'
Jun 20 21:17:30 wx-rpi weewx[24463]: engine: pid file is /var/run/weewx.pid
Jun 20 21:17:30 wx-rpi weewx[24453]: Starting weewx weather system: weewx.
Jun 20 21:17:30 wx-rpi systemd[1]: Started LSB: weewx weather system.
Jun 20 21:17:30 wx-rpi weewx[24467]: engine: Using configuration file /etc/
weewx/weewx.conf
Jun 20 21:17:30 wx-rpi weewx[24467]: engine: Loading station type
Raspberry_Pi (usr.Raspberry_Pi)
Jun 20 21:17:30 wx-rpi weewx[24467]: engine: Caught unrecoverable exception
in engine:
Jun 20 21:17:30 wx-rpi weewx[24467]: **** No module named usr.
Raspberry_Pi
Jun 20 21:17:30 wx-rpi weewx[24467]: **** Traceback (most recent call
last):
Jun 20 21:17:30 wx-rpi weewx[24467]: **** File
"/usr/share/weewx/weewx/engine.py", line 865, in main
Jun 20 21:17:30 wx-rpi weewx[24467]: **** engine = engine_class(
config_dict)
Jun 20 21:17:30 wx-rpi weewx[24467]: **** File
"/usr/share/weewx/weewx/engine.py", line 71, in __init__
Jun 20 21:17:30 wx-rpi weewx[24467]: **** self.setupStation(
config_dict)
Jun 20 21:17:30 wx-rpi weewx[24467]: **** File
"/usr/share/weewx/weewx/engine.py", line 95, in setupStation
Jun 20 21:17:30 wx-rpi weewx[24467]: **** __import__(driver)
Jun 20 21:17:30 wx-rpi weewx[24467]: **** ImportError: No module named
usr.Raspberry_Pi
Jun 20 21:17:30 wx-rpi weewx[24467]: **** Exiting.
Here is the driver file I am trying to use.
#
# $Revision: 1 $
# $Author: Nickolas McColl $
# $Date: 2014-08-16 $
#
"""Raspberry Pi driver for the weewx weather system"""
from __future__ import with_statement
# import math
import time
#import weedb
#import weeutil.weeutil
import weewx.abstractstation
import weewx.wxformulas
def loader(config_dict, engine):
import weewx.units
altitude_m = weewx.units.getAltitudeM(config_dict)
station = Raspberry_Pi(altitude = altitude_m, **config_dict[
'Raspberry_Pi'])
return station
class Raspberry_Pi(weewx.abstractstation.AbstractStation):
"""Station using Raspberry Pi"""
def __init__(self, **stn_dict):
self.altitude = stn_dict['altitude']
self.loop_interval = float(stn_dict.get('loop_interval'))
def genLoopPackets(self):
import weewx.units
while True:
start_time = time.time()
# Create Loop packet
f = open('/var/tmp/weewx/bin/wxdata.csv')
input = f.readline()
f.close()
data = input.split(',')
if len(data) == 13: # data line is complete, process
for i in range(1, (len(data))):
try:
data[i] = float(data[i])
except ValueError:
data[i] = None
raw_time =time.strptime(data[0], "%Y-%m-%d %H:%M:%S")
_packet = {'dateTime': int(time.mktime(raw_time)),
'usUnits' : weewx.METRIC,
'pressure' : data[1],
'outTemp' : data[4],
'outHumidity' : data[5]}
_packet['dewpoint'] = weewx.wxformulas.dewpointC(_packet[
'outTemp'], _packet['outHumidity'])
_packet['barometer'] = weewx.wxformulas.
sealevel_pressure_Metric(_packet['pressure'], self.altitude, _packet[
'outTemp'])
_packet['altimeter'] = weewx.wxformulas.
altimeter_pressure_Metric(_packet['pressure'], self.altitude)
_packet['heatdeg'] = weewx.wxformulas.heating_degrees(
_packet['outTemp'], 18.333)
_packet['cooldeg'] = weewx.wxformulas.cooling_degrees(
_packet['outTemp'], 18.333)
_packet['heatindex'] = weewx.wxformulas.heatindexC(_packet[
'outTemp'], _packet['outHumidity'])
yield _packet
sleep_time = (start_time - time.time()) + self.loop_interval
if sleep_time > 0:
time.sleep(sleep_time)
def hardware_name(self):
return "Raspberry_Pi"
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