RPICT3V1

From lechacal
Jump to: navigation, search
IMG 1122 small.png

Link to shop

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

  • 3 AC current sensor
  • 1 AC Voltage sensor.
  • Compute real power.
  • Fit on Raspberrypi 2 holes mounting pattern.
  • Attiny84 Mcu


Recommended sensors

IMG 1118 small.png
  • AC Current sensor: SCT-013-000
  • AC Voltage sensor:
    • UK: 77DB-06-09
    • EU: 77DE-06-09
    • US: 77DA-10-09 or STA-4190D

Configuration

Starting from sketch version 1.1 the RPICT3V1 is configured over serial.

See general instructions for configuration below:

Configuration over serial for sketch version 1.1.

Configuration over serial for sketch version 1.2.

View the data with Python

Please note the uploaded sketch must have CSV enabled (format=0). 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 "RealP 1: %s Watts" % z[0]
                       print "RealP 2: %s Watts" % z[1]
                       print "RealP 3: %s Watts" % z[2]
                       print "Irms 1: %s mA" % z[3]
                       print "Irms 2: %s mA" % z[4]
                       print "Irms 3: %s mA" % z[5]
                       print "Vrms   : %s Volts" % z[6][:-2]
except KeyboardInterrupt:
       ser.close()

Emoncms Config (Emonhub)

For default configuration.

 [[11]]
   nodename = my_RPICT3V1
   hardware = RPICT3V1
   [[[rx]]]
      names = RP1, RP2, RP3, Irms1, Irms2, Irms3, Vrms
      datacode = 0
      scales = 1,1,1,1,1,1,1
      units =W,W,W,mA,mA,mA,V

Using the default sketch the output will be
NodeID Realpower1 Realpower2 Realpower3 Irms1 Irms2 Irms3 Vrms

  • RealPower in Watts
  • Irms in MilliAmps
  • Vrms in Volts

Rpict3v1 channel emoncms.png

Sketch

Version 1.0
Version 1.1
Version 1.2


If you wish to use the board as a RPICT3 without any use of the voltage use the sketch below. Note power will be estimated power only.
No Voltage Version 1.0

Related Pages

How to calibrate the Voltage Port

Use Emonhub with RPICT

Howto setup rpi3 for CSV reading