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

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

Files

Configuration

Starting from sketch version 1.6 the RPICT4V3 can be configures over serial.

See the configuration documentation here. Attiny_Over_Serial_Configuration_A2

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

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_v1.

RPICT4V3

Contents