shaun/pico-dht22
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Moving to dotenv.

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This commit is contained in:
Shaun Setlock
2025-04-26 21:43:24 -04:00
parent 6e3fa68368
commit 313370476a
1 changed files with 105 additions and 77 deletions
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124
main.py
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@@ -2,14 +2,15 @@ import network
import rp2
import time
import json
import os
import machine
from machine import Pin
from umqtt.robust import MQTTClient
import dht
import urequests
import wifi_config
import mqtt_config
import ha_mqtt_config
from dotenv import load_dotenv
load_dotenv()
# Change this GPIO PIN where your DHT22 sensor is connected
DHT_22_GPIO_PIN = 3
@@ -17,6 +18,7 @@ DHT_22_GPIO_PIN = 3
# Debug Mode
DEBUG = False
def read_cpu_temp():
"""
If you print the value of the temperature value you are going to get an integer number between 0 and 65535.
@@ -32,9 +34,10 @@ def read_cpu_temp():
cpu_temp_sensor = machine.ADC(4)
reading = cpu_temp_sensor.read_u16() * cpu_temp_conversion_factor
temperature_c = 27 - (reading - 0.706) / 0.001721
temperature_f = temperature_c * 9/5. + 32.0
temperature_f = temperature_c * 9 / 5.0 + 32.0
return temperature_f
def read_dht_22(sensor):
"""
reads the temperature and humidity from dht.DHT22 sensor.
@@ -50,9 +53,10 @@ def read_dht_22(sensor):
time.sleep(2)
return None
def wlan_up(wlan):
wlan.active(True)
wlan.connect(wifi_config.HOME_WIFI_SSID, wifi_config.HOME_WIFI_PWD)
wlan.connect(os.getenv("HOME_WIFI_SSID"), os.getenv("HOME_WIFI_PWD"))
# Wait for connect or fail
max_wait = 10
@@ -61,7 +65,7 @@ def wlan_up(wlan):
break
max_wait -= 1
if DEBUG:
print('Waiting for WiFi connection...')
print("Waiting for WiFi connection...")
time.sleep(1)
if max_wait == 0:
@@ -72,6 +76,7 @@ def wlan_up(wlan):
print(ifconfig)
return ifconfig
def led_error_code(led, error_code: int):
"""Blink LED for a given error code (int). error code == number of times to blink"""
if DEBUG:
@@ -107,27 +112,27 @@ def main():
if DEBUG:
print("Start up")
count = 0
led = machine.Pin('LED', machine.Pin.OUT)
led = machine.Pin("LED", machine.Pin.OUT)
led.value(False)
led_error_code(led, 1)
# Set Wi-Fi Country
rp2.country('US')
rp2.country("US")
wlan = network.WLAN(network.STA_IF)
# Create MQTT Client
mqtt_client = MQTTClient(
client_id = mqtt_config.MQTT_CLIENT_ID,
server = mqtt_config.MQTT_HOST_NAME,
client_id=os.getenv("MQTT_CLIENT_ID"),
server=os.getenv("MQTT_HOST_NAME"),
)
# Create Home Assistant MQTT Client
ha_mqtt_client = MQTTClient(
client_id = ha_mqtt_config.MQTT_CLIENT_ID,
server = ha_mqtt_config.MQTT_HOST_NAME,
keepalive = ha_mqtt_config.MQTT_KEEP,
user = ha_mqtt_config.MQTT_USERNAME,
password = ha_mqtt_config.MQTT_PASSWORD,
client_id=os.getenv("MQTT_CLIENT_ID"),
server=os.getenv("MQTT_HOST_NAME"),
keepalive=os.getenv("MQTT_KEEP"),
user=os.getenv("MQTT_USERNAME"),
password=os.getenv("MQTT_PASSWORD"),
)
# Create DHT22
@@ -143,7 +148,7 @@ def main():
led.value(False)
count += 1
if DEBUG:
print(f'\nStarting loop #{count}... \nWiFI Status is {wlan.status()}.')
print(f"\nStarting loop #{count}... \nWiFI Status is {wlan.status()}.")
# Create Local Flags for Control
wifi_ready = False
@@ -157,10 +162,10 @@ def main():
# DHT22 Reading.
dht22_reading = read_dht_22(sensor)
#debug_str = "None"
# debug_str = "None"
if dht22_reading is not None:
temp,hum = dht22_reading
temp = temp * 9/5. + 32.0
temp, hum = dht22_reading
temp = temp * 9 / 5.0 + 32.0
dht22_ready = True
except:
continue
@@ -183,36 +188,39 @@ def main():
wifi_ready = True
ifconfig = wlan.ifconfig()
if DEBUG:
print(f"Skipping WiFi Activation since WiFi Status is {wlan.status()} \n{ifconfig}.")
print(
f"Skipping WiFi Activation since WiFi Status is {wlan.status()} \n{ifconfig}."
)
except:
continue
# MQTT Connection to Primary Broker.
try:
mqtt_client.connect(clean_session = False)
mqtt_client.connect(clean_session=False)
mqtt_ready = True
mqtt = 'mosquitto'
mqtt = "mosquitto"
if DEBUG:
print(f'Connected to Mosquitto MQTT broker.')
print(f"Connected to Mosquitto MQTT broker.")
except Exception as e:
if DEBUG:
print("Trouble to connecting to Mosquitto MQTT: {}".format(e))
# MQTT Connection to Back Up Broker.
if not mqtt_ready:
try:
try:
ha_mqtt_client.connect(clean_session = False)
ha_mqtt_client.connect(clean_session=False)
mqtt_ready = True
mqtt = 'ha'
mqtt = "ha"
if DEBUG:
print(f'Connected to the back up, Home Assistant, MQTT broker.')
print(f"Connected to the back up, Home Assistant, MQTT broker.")
except Exception as f:
if DEBUG:
print("Trouble to connecting to Home Assistant MQTT: {}".format(f))
print(
"Trouble to connecting to Home Assistant MQTT: {}".format(f)
)
led_error_code(led, 2)
time.sleep(5)
continue # Start back at the top of the While Loop
@@ -220,56 +228,76 @@ def main():
except:
continue
# Ready to Publish?
try:
if wifi_ready and mqtt_ready and dht22_ready:
# Timestamp
time_now = time.localtime()
timestamp = "{}/{}/{} {}:{}:{}".format(time_now[1],time_now[2],time_now[0],time_now[3],time_now[4],time_now[5])
timestamp = "{}/{}/{} {}:{}:{}".format(
time_now[1],
time_now[2],
time_now[0],
time_now[3],
time_now[4],
time_now[5],
)
# Build JSON Payloads
dht_data = {
'Location':mqtt_config.MQTT_ZONE_ID,
'Temperature':temp,
'Relative Humidity':hum,
"Location": os.getenv("MQTT_ZONE_ID"),
"Temperature": temp,
"Relative Humidity": hum,
}
dht_payload = json.dumps(dht_data)
hw_data = {
'Timestamp':timestamp,
'CPU Temperature':cpu_temp,
'Device':mqtt_config.MQTT_HW_ID,
'WiFi Information':ifconfig,
"Timestamp": timestamp,
"CPU Temperature": cpu_temp,
"Device": os.getenv("MQTT_HW_ID"),
"WiFi Information": ifconfig,
}
hw_payload = json.dumps(hw_data)
if DEBUG:
print(f'Trying to publish...')
print(f"Trying to publish...")
if mqtt == 'mosquitto':
if mqtt == "mosquitto":
# Publish
mqtt_client.publish("home/{}".format(mqtt_config.MQTT_ZONE_ID),dht_payload, retain=True)
mqtt_client.publish("hw/{}".format(mqtt_config.MQTT_HW_ID),hw_payload, retain=True)
mqtt_client.publish(
"home/{}".format(os.getenv("MQTT_ZONE_ID")),
dht_payload,
retain=True,
)
mqtt_client.publish(
"hw/{}".format(os.getenv("MQTT_HW_ID")), hw_payload, retain=True
)
mqtt_client.disconnect()
if DEBUG:
print(f'MQTT Disconnected.')
print(f"MQTT Disconnected.")
if mqtt == 'ha':
if mqtt == "ha":
# Publish
ha_mqtt_client.publish("home/{}".format(mqtt_config.MQTT_ZONE_ID),dht_payload, retain=True)
ha_mqtt_client.publish("hw/{}".format(mqtt_config.MQTT_HW_ID),hw_payload, retain=True)
ha_mqtt_client.publish(
"home/{}".format(os.getenv("HA_MQTT_ZONE_ID")),
dht_payload,
retain=True,
)
ha_mqtt_client.publish(
"hw/{}".format(os.getenv("HA_MQTT_HW_ID")),
hw_payload,
retain=True,
)
ha_mqtt_client.disconnect()
if DEBUG:
print(f'MQTT Disconnected.')
print(f"MQTT Disconnected.")
except:
continue
# Sleep for a bit.
if DEBUG:
print(f'Finished loop #{count}.')
print(f"Finished loop #{count}.")
time.sleep(5)
main()