Merge pull request #34 from Taxelas/patch-1

Create mcp9808_average temp+mqtt

examples/mcp9808_average_temp_mqtt.py

@@ -0,0 +1,73 @@
+# SPDX-FileCopyrightText: 2022 Taxelas
+# SPDX-License-Identifier: MIT
+"""
+python script to read mcp9808 temperature and publish it in mqtt.
+Using discovery topic to create entity in Home Assistant.
+"""
+
+import time
+import json
+from array import array
+import board
+import paho.mqtt.client as mqtt
+import numpy as np
+import adafruit_mcp9808
+
+
+i2c = board.I2C()  # uses board.SCL and board.SDA
+
+# To initialise using the default address:
+mcp = adafruit_mcp9808.MCP9808(i2c)
+
+broker_address = "Broker IP"
+port = 1883
+user = "mqttuser"
+password = "mqttpassword"
+client = mqtt.Client("P1")  # create new instance
+client.username_pw_set(user, password=password)
+client.connect(broker_address, port=port)
+client.loop_start()
+# To initialise using a specified address:
+# Necessary when, for example, connecting A0 to VDD to make address=0x19
+# mcp = adafruit_mcp9808.MCP9808(i2c_bus, address=0x19)
+
+
+# Create autodiscovery topic for Home assistant
+# "ha" is autodiscovery prefix in home assistant
+send_msg = {
+    "state_topic": "ha/sensor/sensorLivingroom/state",
+    "device_class": "temperature",
+    "unit_of_measurement": "°C",
+    "value_template": "{{ value_json.temperature }}",
+    "device": {
+        "identifiers": ["rpisensorgatewayn01"],
+        "manufacturer": "Raspberry",
+        "model": "RPI 3B",
+        "name": "Livingroom temperature",
+        "sw_version": "MCU9808",
+    },
+    "name": "Livingroom temperature",
+    "unique_id": "rpisensorgateway_0x01",
+}
+client.publish(
+    "ha/sensor/sensorLivingroom/config",
+    payload=json.dumps(send_msg),
+    qos=0,
+    retain=True,
+)  # publish
+temp1m = array(
+    "d", [0, 0, 0, 0, 0, 0, 0, 0, 0]
+)  # using array to aproximate 10 temperature readings
+avgtemp = 0
+while True:
+    print(len(temp1m))
+    for count in range(0, 9):
+        temp1m[count] = mcp.temperature
+        print("Temperature: {} C ".format(mcp.temperature))
+        avgtemp = round(np.average(temp1m), 1)
+        print("avgtemp {} C".format(avgtemp))
+        time.sleep(10)
+    send_msg = {"temperature": avgtemp}
+    client.publish(
+        "ha/sensor/sensorLivingroom/state", payload=json.dumps(send_msg)
+    )  # publish result in mqtt