AC Current

Hardware

• RPICT7V1 AC current sensor
• SCT-013-000 100a Current Transformer
• UK: 77DB-06-09 Voltage Sensor

Script

MQTT_SERV = "localhost"
MQTT_PATH = "RPICT7V1"
MQTT_USER = ""
MQTT_PASS = ""

CHANNELS = ["NodeID", "RP1", "RP2", "RP3", "RP4", "RP5", "RP6", "RP7",
        "Irms1", "Irms2", "Irms3", "Irms4", "Irms5", "Irms6", "Irms7",
        "Vrms"]

import paho.mqtt.client as mqtt
import serial
ser = serial.Serial('/dev/ttyAMA0', 38400)

client = mqtt.Client("P1")
client.username_pw_set(MQTT_USER, MQTT_PASS)
client.connect(MQTT_SERV)

try:
    while 1:
        # Read one line from the serial buffer
         line = ser.readline()
     
        # Remove the trailing carriage return line feed
        line = line[:-2]
     
        # Create an array of the data
        Z = line.split(' ')
     
        # Print it for debug
        print line
     
        # Publish to the MQTT broker
        for i in range(len(Z)):
            client.publish("%s/%s" % (MQTT_PATH, CHANNELS[i]), Z[i]) 
 
except KeyboardInterrupt:
    client.disconnect()
    ser.close()

References

RPICT7V1