Update dht22 sensing code + sispmctl fixes

full.yml

@@ -0,0 +1,17 @@
+---
+- hosts: bedroompi, kitchenpi
+  roles:
+    - pi-standard-setup
+    - pi-squeezelite-custom
+    - pi-shairport
+    - pi-lirc
+    - pi-dhtsensor
+
+- hosts: esszimmerradio
+  roles:
+    - pi-standard-setup
+    - pi-squeezelite-custom
+    - pi-shairport
+    - pi-lirc
+    - pi-sispmctl
+    #- pi-dhtsensor

inventory.yml

@@ -23,6 +23,7 @@ all:
           squeezelite_name: Esszimmer
           shairport_name: EsszimmerRadio
           wifi_ssid: BauerWLAN
+          alsa_card_name: 0
         newrpi:
           squeezelite_name: MyTestRaspberry
           shairport_name: MyTestRaspberry

roles/pi-dhtsensor/files/dht22_sensing.py

@@ -9,6 +9,31 @@ import Adafruit_DHT
 config = json.load(open("/etc/dht22_sensing.json"))
 
 
+class Filter:
+    def __init__(self, filter_length, max_mean_deviation):
+        self._length = filter_length
+        self.values = []
+        self.max_mean_deviation = max_mean_deviation
+
+    def mean(self):
+        return sum(self.values) / len(self.values)
+
+    def is_valid_value(self, val):
+        if len(self.values) == 0:
+            return True
+        else:
+            return abs(val - self.mean()) < self.max_mean_deviation
+
+    def add_if_valid(self, val):
+        if self.is_valid_value(val):
+            self.values.append(val)
+            if len(self.values) > self._length:
+                self.values.pop(0)
+            return True
+        else:
+            return False
+
+
 def send_to_home_assistant(temperature, humidity):
     # print(f"Sending temperature {temperature}, humidity {humidity}")
     headers = {
@@ -41,9 +66,32 @@ def send_to_home_assistant(temperature, humidity):
     requests.post(humidity_url, json=humidity_data, headers=headers)
 
 
+last_values = []
+
+
+def filter(value):
+    last_values.append(value)
+
+
 if __name__ == "__main__":
+    temp_filter = Filter(10, 5)
+    humidity_filter = Filter(10, 5)
+
     while True:
         sensor = Adafruit_DHT.DHT22
-        humidity, temperature = Adafruit_DHT.read_retry(sensor, config['dht_pin'])
-        send_to_home_assistant(temperature, humidity)
+        humidity, temperature = Adafruit_DHT.read_retry(
+            sensor, config['dht_pin'])
+
+        temp_valid = temp_filter.add_if_valid(temperature)
+        humidity_valid = humidity_filter.add_if_valid(humidity)
+        if not (temp_valid and humidity_valid):
+            print(
+                f"Discarding value {temperature}C  / {humidity}%, because to far from means {temp_filter.mean()}C, {humidity_filter.mean()}%")
+        else:
+            try:
+                send_to_home_assistant(temperature, humidity)
+            except Exception as e:
+                print("Failed sending to home assistant")
+                print(e)
+
         time.sleep(float(config['polling_sleep_time_seconds']))

roles/pi-sispmctl/tasks/main.yml

@@ -1,15 +1,15 @@
 ---
-
+- name: Check if sispmctl already exists
+  stat: path=/usr/local/bin/sispmctl
+  register: sispmctl_file
 - name: Install dependencies
-  apt: name=libusb-dev cache_valid_time=7200 state=present
+  apt: name="libusb-dev" cache_valid_time=7200 state=present
 - name: Copy sispmctl sources
-  unarchive:
-    src: sispmctl-4.7.tar.gz
-    dest: /tmp
-  creates: /usr/local/bin/sispmctl    
+  unarchive: src=sispmctl-4.7.tar.gz dest=/tmp
+  when: sispmctl_file.stat.exists == false
 - name: Build and install
-  command: cd /tmp/sispmctl*/ && ./configure && make install
-  creates: /usr/local/bin/sispmctl
+  shell: cd /tmp/sispmctl*/ && ./configure --prefix=/usr && make install
+  when: sispmctl_file.stat.exists == false
 - name: Install systemd service file
   copy: src=sispmctl.service dest=/lib/systemd/system/
 - name: Add script to autostart and start now

roles/pi-standard-setup/files/motd/esszimmerradio

@@ -0,0 +1,12 @@
+  EsszimmerRadio Eltern
+  
+       ________
+      /______  |
+     |       | |      _
+     | ===== | |     | |
+     | ===== | |    o o
+     |       | |         |~
+     |  .-.  | |       o    o o
+     | ' . ' | |   |~       |_|
+  ..'| '._.' | |  o
+.'   |_______|/