RPICT4V3 Version 6
This page is for board specific information. More information can be found on the generic page for RPICT series.
- 4 AC current sensors.
- 3 AC Voltage sensors.
- Compute real power.
- Fit on Raspberrypi 3/4/5 holes mounting pattern.
- 12 bits ADC
- AVR32DB32 Mcu (Arduino)
- Stackable (up to 5 boards together)
Applications
A typical application for the RPICT4V3 is 3 phase systems power reading. The 3 voltages are coupled with 3 CT to perform power computation on each line.
Another use of the RPICT4V3 is for computing power on single phase lines that have different voltages.
The use of 3 phase or individual phase is selectable in the configuration of the device.
Compatibility
Version | Compatible? |
---|---|
Raspberrypi 1 A | No |
Raspberrypi 1 B | No mounting holes. |
Raspberrypi 1 B+ | Yes |
Raspberrypi 2 B | Yes |
Raspberrypi 3 B | Yes |
Raspberrypi 3 B+ | Yes |
Raspberrypi 4 B | Yes |
Raspberrypi 5 | Yes |
Recommended sensors
- AC Current sensor:
- SCT-013-000 100A/50mA
- SCT-019 200A/33mA
- SCT-006 20A/25mA
- SCT-024 400A/100mA
- SCT-031 600A/100mA
- AC Voltage sensor:
- ZMPT101B Module
- 3X ZMPT Module
- UK: 77DB-06-09
- EU: 77DE-06-09
- US: 77DA-10-09
Stacking Configuration
General stacking information is described in the RPICT stacking page.
Software Configuration
Configuration via web interface
First make sure the lcl-package is installed if not done already.
wget lechacal.com/RPICT/tools/lcl-rpict-package_latest.deb
sudo dpkg -i lcl-rpict-package_latest.deb
Now starts a server instance on the Raspberrypi using.
lcl-server.sh
You can now access the Raspberrypi configuration server if you point your browser to the link below
You can now edit the configuration.
An online version of this web interface exists on this link below.
http://lechacal.com/RPICT/config/generator/latest/index.html
Configuration via command line
The documentation for serial configuration can be found on this page. Over_Serial_Configuration_-_Sketch_4 The tool to upload the configuration is called lcl-rpict-config.py. To read the configuration use
lcl-rpict-config.py -a
This produce the /tmp/rpict.conf file containing the configuration of the device.
One can modify this file and write it back using
lcl-rpict-config.py -a -w /tmp/rpict.conf
Files
Unit are sold with the sketch below already loaded.
If needed this sketch can be loaded directly from the Raspberrypi following this guide and executing the commands below.
wget lechacal.com/RPICT/sketch/RPICT_v5.0.1.ino.hex
lcl-upload-sketch RPICT_v5.0.1.ino.hex
Simple Python Example
The example python script below will work well with the default configuration.
import serial
ser = serial.Serial('/dev/ttyAMA0', 38400)
try:
while 1:
# Read one line from the serial buffer
line = ser.readline().decode().strip()
# Create an array of the data
Z = line.split(' ')
# Print it nicely
if len(Z)>10:
print ("----------")
print (" \tCT1\tCT2\tCT3\tCT4")
print ("Vrms :\t%s\t%s\t%s\t%s" % (Z[8], Z[9], Z[10], ""))
print ("RealPower:\t%s\t%s\t%s\t%s" % (Z[1], Z[2], Z[3], ""))
print ("Irms :\t%s\t%s\t%s\t%s" % (Z[4], Z[5], Z[6], Z[7]))
except KeyboardInterrupt:
ser.close()
To run this first of all make sure you have python-serial package installed
sudo apt-get install python3-serial
Then run the command below to download the script.
wget lechacal.com/RPICT/example/RPICT4V3_DEMO_03.py.zip
unzip RPICT4V3_DEMO_03.py.zip
and run it using
python RPICT4V3_DEMO_03.py
Data Output
The default data output is:
NodeID P1 P2 P3 Irms1 Irms2 Irms3 Irms4 Vrms1 Vrms2 Vrms3
Real Powers are computed using the following rules:
P1 -> CT1 & V1
P2 -> CT2 & V2
P3 -> CT3 & V3
Irms4 -> CT4
P1, P2 and P3 are active power (or real power).
These rules can be modified in the configuration if needed.
Other output type can be streamed out. This should be configured in the unit.
All outputs type available are
- Vrms (V)
- Irms (A)
- Real Power (W)
- Apparent Power (W)
- Power Factor
- Estimated Power
Restore Default Config
You should have received a key when acquiring the unit. Use this key to download and restore the default configuration. If the key was XXXX then execute these commands below. Replace XXXX with your own key.
wget lechacal.com/hardware/c/XXXX.conf
lcl-rpict-config.py -a -w XXXX.conf
Emoncms Config (Emonhub)
Make sure you read this first.
For the default configuration use the configuration below.
[[/11|11]]
nodename = RPICT4V3
hardware = RPICT4V3
[[[rx]]]
names = P1,P2,P3,Irms1,Irms2,Irms3,Irms4,Vrms1,Vrms2,Vrms3
datacode = 0
scales = 1,1,1,1,1,1,1,1,1,1
units = W,W,W,A,A,A,A,V,V,V
Enclosure
Enclosures kit are available as a 3D printed product.
All Raspberrypi 3/4 and 5 format are available.
Related Pages
Howto_setup_Raspbian_for_serial_read
Calibration VCAL ICAL PHASECAL