RPICT4V3

Link to shop

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

• 4x AC current sensor
• 3x AC Voltage sensor.
• Compute real power.
• Fit on Raspberrypi 4 holes mounting pattern.
• Attiny84 Mcu

Recommended sensors

• AC Current sensor: SCT-013-000
• AC Voltage sensor:
  • UK: 77DB-06-09
  • EU: 77DE-06-09
  • US: 77DA-10-09 or STA-4190D

Files

Default Sketch V1.1.

Default Sketch V1.2.

Default Sketch V1.3.

Power Association

The RPICT4V3 computes RealPower using the combination of Voltage and Current sensor.
The 4 RealPower are computed using the following combinations:

RealPower1 -> CT1 and V1

RealPower2 -> CT2 and V2

RealPower3 -> CT3 and V3

RealPower4 -> CT4 and V3

Emoncms Output

Emonhub Config

 [[11]]
   nodename = RPICT4V3
   firmware = RPICT4V3_V1_1.ino
   hardware = RPICT4V3
   [[[rx]]]
       names = Vrms1,Vrms2,Vrms3,Realpower1,Realpower2,Realpower3,Realpower4
       datacodes = h, h, h, h, h, h, h
       scales = 1,1,1,1,1,1,1
       units = V,V,V,W,W,W,W

View the data with Python

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/ttyAMA0', 38400)

try:
       while 1:
               response = ser.readline()
               z = response.split(",")
               if len(z)>=6:
                       print "Vrm1: %s Volts" % z[0]
                       print "Vrm1: %s Volts" % z[1]
                       print "Vrm1: %s Volts" % z[2]
                       print "RealP 1: %s Watts" % z[3]
                       print "RealP 2: %s Watts" % z[4]
                       print "RealP 2: %s Watts" % z[5]
                       print "RealP 2: %s Watts" % z[6][:-2]
except KeyboardInterrupt:
       ser.close()

Sketch Upload

An avr programmer with 6pin ribbon cable is needed for programming. See our programmer called Nanoprog.

There is no jumper to remove to program this board.

Related Link

How to calibrate the Voltage Port