From 6aec99371d66bee67be5580803141d09e04151da Mon Sep 17 00:00:00 2001
From: vg8020 <40881962+vg8020@users.noreply.github.com>
Date: Fri, 6 Jul 2018 09:38:04 +0200
Subject: [PATCH] Add support for Nexus Temperature sensor

Please, edit as needed.

pi@raspberrypi:~ $ sudo PYTHONPATH=/usr/share/weewx python /usr/share/weewx/user/sdr.py
parsed: {'temperature.1:55.NexusTemperaturePacket': 26.7, 'battery.1:55.NexusTemperaturePacket': 0, 'usUnits': 16, 'dateTime': 1530316225}
parsed: {'temperature.1:173.NexusTemperaturePacket': 27.2, 'battery.1:173.NexusTemperaturePacket': 1, 'usUnits': 16, 'dateTime': 1530316234}

Nexus sensor protocol from rtl_433
https://github.com/merbanan/rtl_433/blob/master/src/devices/nexus.c
---
 bin/user/sdr.py | 36 +++++++++++++++++++++++++++++++++++-
 1 file changed, 35 insertions(+), 1 deletion(-)

diff --git a/bin/user/sdr.py b/bin/user/sdr.py
index ab5b103..4fb49d1 100755
--- a/bin/user/sdr.py
+++ b/bin/user/sdr.py
@@ -1518,6 +1518,39 @@ def parse_json(obj):
         pkt = Packet.add_identifiers(pkt, sensor_id, ProloguePacket.__name__)
         return pkt
 
+class NexusTemperaturePacket(Packet):
+    # 2018-06-30 01:12:12 :   Nexus Temperature
+    #         House Code:      55
+    #         Battery:         OK
+    #         Channel:         1
+    #         Temperature:     27.10 C
+
+    IDENTIFIER = "Nexus Temperature"
+    PARSEINFO = {
+        'House Code': ['house_code', None, lambda x: int(x)],
+        'Battery': ['battery', None, lambda x: 0 if x == 'OK' else 1],
+                'Channel': ['channel', None, lambda x: int(x)],
+        'Temperature':
+            ['temperature', re.compile('([\d.-]+) C'), lambda x : float(x)]}
+
+    @staticmethod
+    def parse_text(ts, payload, lines):
+        pkt = dict()
+        pkt['dateTime'] = ts
+        pkt['usUnits'] = weewx.METRIC
+        pkt.update(Packet.parse_lines(lines, NexusTemperaturePacket.PARSEINFO))
+        return OS.insert_ids(pkt, NexusTemperaturePacket.__name__)
+
+    @staticmethod
+    def parse_json(obj):
+        pkt = dict()
+        pkt['dateTime'] = Packet.parse_time(obj.get('time'))
+        pkt['usUnits'] = weewx.METRIC
+        pkt['house_code'] = obj.get('id')
+        pkt['battery'] = 0 if obj.get('battery') == 'OK' else 1
+        pkt['channel'] = obj.get('channel')
+        pkt['temperature'] = Packet.get_float(obj, 'temperature_C')
+        return OS.insert_ids(pkt, NexusTemperaturePacket.__name__)
 
 class PacketFactory(object):
 
@@ -1552,7 +1585,8 @@ class PacketFactory(object):
         OSWGR800Packet,
         OSTHN802Packet,
         OSBTHGN129Packet,
-        ProloguePacket]
+        ProloguePacket,
+        NexusTemperaturePacket]
 
     @staticmethod
     def create(lines):