jdz/modbus_door.py

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Python
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import minimalmodbus
import time, os
import serial
import RPi.GPIO as GPIO
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import subprocess
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import paho.mqtt.client as mqtt
# MQTT Broker settings
mqttBroker ="65.108.199.212"
myhost = os.uname()[1]
client = mqtt.Client(myhost)
client.connect(mqttBroker, 1883)
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preferred_device = '/dev/ttyUSB0'
fallback_device = '/dev/ttyUSB5'
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device_path = preferred_device if os.path.exists(preferred_device) else fallback_device
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modbus_device = '/dev/modbus'
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# Modbus configuration
mb_address = 1 # Modbus address
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#sensy_boi = minimalmodbus.Instrument(device_path, mb_address)
sensy_boi = minimalmodbus.Instrument(modbus_device, mb_address)
#sensy_boi = minimalmodbus.Instrument(preferred_device, mb_address)
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sensy_boi.serial.baudrate = 9600
sensy_boi.serial.bytesize = 8
sensy_boi.serial.parity = minimalmodbus.serial.PARITY_NONE
sensy_boi.serial.stopbits = 1
sensy_boi.serial.timeout = 0.5
sensy_boi.mode = minimalmodbus.MODE_RTU
# Configure buffer clearing and port closing settings
sensy_boi.clear_buffers_before_each_transaction = True
sensy_boi.close_port_after_each_call = True
# GPIO configuration
GPIO.setmode(GPIO.BCM)
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GPIO.setwarnings(False)
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# Define pin numbers
PIN_17 = 17
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PIN_23 = 23
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LuzPuerta = 18
LuzEncendido = 25
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# Set GPIO
GPIO.setup(PIN_17, GPIO.IN)
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GPIO.setup(PIN_23, GPIO.IN)
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GPIO.setup(LuzPuerta, GPIO.OUT)
GPIO.setup(LuzEncendido, GPIO.OUT)
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try:
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while True:
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status_17 = GPIO.input(PIN_17)
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if GPIO.input(23) == GPIO.HIGH:
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print("Adquiriendo datos...")
# Read data from multiple registers
data = sensy_boi.read_registers(0, 2, 3)
print("")
print(f"Datos crudos {data}")
# Process the raw data
hum = data[0] / 10
temp = data[1] / 10
client.publish("iiot/"+ myhost +"/temperature", temp)
client.publish("iiot/"+ myhost +"/humidity", hum)
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client.publish(f"iiot/{myhost}/door/pin17", str(status_17))
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# Print the processed data
print("-------------------------------------")
print(f"Temperatura = {temp}\u00B0C")
print(f"Humedad relativa = {hum}%")
print("-------------------------------------")
print("")
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time.sleep(15)
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if GPIO.input(PIN_17) == GPIO.LOW:
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GPIO.output(LuzPuerta, GPIO.HIGH) # Luz Roja encendida
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else:
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GPIO.output(LuzPuerta, GPIO.LOW)
GPIO.output(LuzEncendido, GPIO.HIGH)
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except Exception as e:
print(f"Error: {str(e)}")
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finally:
GPIO.cleanup()
print("Programa finalizado")