Unfortunately I could only proof of concept this to myself on
Wunderground+APRS CWOP - turns out there is no place, no inexpensive way,
that I can put the sensors around my home where they won't delta out of QC
with neighboring stations for hours every day. Now they're inside 2
refrigerators being received on their base stations & decoded by rtl_433.
/*Users/Username/weewx/weewx-data/weewx.conf:*
station_type = SDR *(instead of simulator)*
[SDR]
driver = user.sdr
cmd = /usr/local/bin/rtl_433 -M utc -F json -f 433.92M -s 1024k -g 42.1
[[sensor_map]]
outTemp = temperature.0C23.AcuriteTowerPacketV2
outHumidity = humidity.0C23.AcuriteTowerPacketV2
extraTemp1 = temperature.112.LaCrosseTXPacket
process_services = weewx.engine.StdConvert, weewx.engine.StdCalibrate,
*user.temp_fallback.TempFallback*, weewx.engine.StdQC,
weewx.wxservices.StdWXCalculate
*weewx-data/bin/user/sdr.py
(from https://github.com/matthewwall/weewx-sdr):*
IDENTIFIER = "LaCrosse-TX" *(instead of IDENTIFIER = "LaCrosse TX Sensor"
which was out of date)*
*/Users/Username/weewx/weewx-venv/bin/weewxd-rebind:*
#!/usr/bin/env python3
import subprocess
import json
import re
import os
CONF_PATH = "/Users/Username/weewx/weewx-data/weewx.conf"
WEEWXD_PATH = "/Users/Username/weewx/weewx-venv/bin/weewxd"
RTL_CMD = [
"/usr/local/bin/rtl_433",
"-M", "utc",
"-F", "json",
"-f", "433.92M",
"-s", "1024k",
"-g", "42.1"
]
def get_lacrosse_id():
print("Sniffing SDR stream for active LaCrosse sensor ID...")
proc = subprocess.Popen(RTL_CMD, stdout=subprocess.PIPE,
stderr=subprocess.DEVNULL, text=True)
try:
stdout, _ = proc.communicate(timeout=10)
except subprocess.TimeoutExpired:
proc.terminate()
stdout, _ = proc.communicate()
for line in stdout.splitlines():
if not line.strip():
continue
try:
data = json.loads(line)
model = data.get("model", "")
if "LaCrosse" in model and "id" in data:
sensor_id = str(data["id"])
print(f"Detected LaCrosse sensor ID: {sensor_id}")
return sensor_id
except json.JSONDecodeError:
continue
return None
def update_weewx_conf(new_id):
if not os.path.exists(CONF_PATH):
print(f"Config file not found at {CONF_PATH}")
return
with open(CONF_PATH, "r") as f:
content = f.read()
pattern = r"(extraTemp1\s*=\s*temperature\.)([^.]+)(\.LaCrosseTXPacket)"
match = re.search(pattern, content)
if match:
old_id = match.group(2)
if old_id == new_id:
print(f"LaCrosse ID {new_id} is already up to date in
weewx.conf.")
return
new_content = re.sub(pattern, rf"\g<1>{new_id}\g<3>", content)
with open(CONF_PATH, "w") as f:
f.write(new_content)
print(f"Updated weewx.conf: swapped ID '{old_id}' -> '{new_id}'.")
else:
print("Warning: Could not find 'extraTemp1 =
temperature.[id].LaCrosseTXPacket' pattern in weewx.conf.")
if __name__ == "__main__":
sensor_id = get_lacrosse_id()
if sensor_id:
update_weewx_conf(sensor_id)
else:
print("Warning: LaCrosse sensor ID not detected within timeout;
launching with existing configuration.")
os.execvp(WEEWXD_PATH, [WEEWXD_PATH, CONF_PATH])
*Library/LaunchAgents/com.weewx.plist:*
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN"
"http://www.apple.com/DTDs/PropertyList-1.0.dtd";>
<plist version="1.0">
<dict>
<key>Label</key>
<string>com.weewx</string>
<key>ProgramArguments</key>
<array>
<string>/Users/Username/weewx/weewx-venv/bin/weewxd-rebind</string>
<string>/Users/Username/weewx/weewx-data/weewx.conf</string>
</array>
<key>RunAtLoad</key>
<true/>
<key>KeepAlive</key>
<true/>
<key>StandardOutPath</key>
<string>/Users/Username/weewx/weewx-data/weewx.log</string>
<key>StandardErrorPath</key>
<string>/Users/Username/weewx/weewx-data/weewx.log</string>
</dict>
</plist>
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