RPICT4V3

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Overview

This is RPICT4V3 version 1. This version does not support over serial configuration.

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


IMG 0899.JPG

Compatibility

Version Compatible?
Raspberrypi 1 A Yes
Raspberrypi 1 B+ Yes
Raspberrypi 2 B Yes
Raspberrypi 3 B Yes
Raspberrypi 3 B+ Yes

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

IMG 0837 small.jpg

Files

Default Sketch V1.1.

Default Sketch V1.2.

Default Sketch V1.3.

Default Sketch V1.4.

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 Config (Emonhub)

For default configuration.

 [[11]]
   nodename = RPICT4V3
   hardware = RPICT4V3
   [[[rx]]]
       names = Vrms1,Vrms2,Vrms3,Realpower1,Realpower2,Realpower3,Realpower4
       datacode = 0
       scales = 1,1,1,1,1,1,1
       units = V,V,V,W,W,W,W


Emoncms channels.png

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 "Vrm2: %s Volts" % z[1]
                       print "Vrm3: %s Volts" % z[2]
                       print "RealP 1: %s Watts" % z[3]
                       print "RealP 2: %s Watts" % z[4]
                       print "RealP 3: %s Watts" % z[5]
                       print "RealP 4: %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

How_to_program_an_Attiny85_or_Attiny84

Howto setup rpi3 for CSV reading