Hi,
I'm using weewx on a RaspberryPi2 with an Origon WMR928. I'm adding sensor
to my WMR928 in a different way as 'adding sensors' is descripted in
documention. I have developed a circuit with an ATMega128 and a 868Mhz
RFM12 module some years ago (before apeareance of RPi on the market). This
circiut connects the WMR928 to the RaspberryPi. The RFM12 connects
supplementary sensors, the Firmware of the ATMega128 translates the
RFM12-sensor-protocol to an Oregon compatible protocol. That means starting
0xffff are the same as the original, third byte is my new ptype and
checksum will be calculated as WMR928 does.
Now I have extended wmr9x8.py for a second windspeed sensor like this:
DEFAULT_MAP = {
'barometer': 'barometer',
'pressure': 'pressure',
'windSpeed': 'wind_speed',
...
'wind2Speed': 'wind2_speed',
'wind2Gust': 'wind2_gust',
'wind2Vbat': 'wind2_vbat',
'wind2Temp': 'wind2_temp',
'wind2BatteryStatus': 'battery_status_wind2',
'wind2Charging': 'charging_wind2',
'wind2HeaterOn': 'heateron_wind2'}
and I have added follwing code:
@wmr9x8_registerpackettype(typecode=0x10, size=13)
def _wmr9x8_lisa_packet(self, packet):
"""Decode a lisa wind packet. Wind speed will be in kph"""
null, status, vbat100th, vbat10th, vbat1, gust10th, gust1, gust10,
avg10th, avg1, avg10, chillstatus, chill1, chill10, ltmp10th, ltmp1,
ltmp10, ltmp100etc
battery = (status & 0x04) >> 2
charging = (status & 0x08) >> 3
heater_on = (chillstatus & 0x04) >> 2
# The console returns wind speeds in m/s. Our metric system requires
# kph, so the result needs to be multiplied by 3.6
_record = {
'battery_status_wind2': battery,
'charging_wind2': charging,
'heateron_wind2': heater_on,
'wind2_speed': ((avg10th / 10.0) + avg1 + (avg10 * 10)) * 3.6,
'wind2_vbat': ((vbat100th / 100.0) + (vbat10th / 10.0) + vbat1),
'dateTime': int(time.time() + 0.5),
'usUnits': weewx.METRIC
}
# Sometimes the station emits a wind gust that is less than the
# average wind. Ignore it if this is the case.
windGustSpeed = ((gust10th / 10.0) + gust1 + (gust10 * 10)) * 3.6
if windGustSpeed >= _record['wind2_speed']:
_record['wind2_gust'] = windGustSpeed
# chill has no data;
tempoverunder = temp100etc & 0x04
temp_no_data = chillstatus & 0x08
if not tempoverunder and not temp_no_data:
temp = (ltmp10th / 10.0) + ltmp1 + (ltmp10 * 10) + ((ltmp100etc
& 0x03) * 100)
if ltmp100etc & 0x08:
temp = -temp
_record['wind2_temp'] = temp
else:
_record['wind2_temp'] = None
return _record
I have extended and reconfigured the database as descriped in doc website
(which is ok). But the new table columns are empty.
So I have added some more code to wmr9x8.py:
# WMR-9x8/968 packets are framed by 0xFF characters
if buf[0] == 0xFF and buf[1] == 0xFF and buf[2] in
wmr9x8_packet_type_size_map:
# Look up packet type, the expected size of this packet type
ptype = buf[2]
*logdbg("Received packet type (%s)." % ptype)*
I never see my new packet type in log file. Why not? Should be there if
buf[0] and buf[1] are 0xFF...
Kind regards
Klaus
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