RPICT4T4

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This page is for board specific information. More information can be found on the generic page for RPICT series.

• 4x AC Current Sensors
• 4x DS18B20 Temperature Sensors
• Attiny84 Mcu

Current Sensor

Recommended sensor: SCT-013-000

Burden Resistor: 24 Ohm

Connector: 3.5mm Jack

Default Voltage for power calculation: 240V (can be modified in firmware).

For AC current only.

Temperature Sensor

Connector: 3.5mm Jack

The intended temperature sensor is the DS18B20 which can be configure in either parasite or normal mode.

The connection to a 3.5mm jack connector is shown below.

NOTE: Raspberrypi must be switched off while connecting and disconnecting the temperature sensor.

Python Example

Please note the uploaded sketch must have CSV enabled. The example script below will be a good starting point.

First of all make sure you have python-serial package installed

$ sudo apt-get install python-serial

Then copy the following into an executable file and run it.

#!/usr/bin/python
import serial
ser = serial.Serial('/dev/ttyS0', 38400, timeout=1)

try:
       while 1:
               response = ser.readline()
               z = response.split(",")
               if len(z)>=6:
                       print "Power 1: %s Watts" % z[0]
                       print "Power 2: %s Watts" % z[1]
                       print "Power 3: %s Watts" % z[2]
                       print "Power 4: %s Watts" % z[3]
                       print "Temperature 1: %s C" % z[4]
                       print "Temperature 2: %s C" % z[5]
                       print "Temperature 3: %s C" % z[6]
                       print "Temperature 4: %s C" % z[7][:-2]
except KeyboardInterrupt:
       ser.close()

Files

Sketch version 1.2