Before 1st March 22 RPICT4V3 Version 3 Configuration
Software Configuration
Using a serial line terminal program one can configure the following:
- Polling interval - Output format (csv or emoncms) - Calibration values (Voltage and Current)
The documentation for serial configuration can be found on this page.
Over Serial Configuration - Sketch 3.0
Files
3Phase sketch
This is the default firmware from manufacture.
Individual Phase Sketch
If not using the RPICT4V3 for 3 phase you can use the firmware for individual line.
Using this sketch the configuration tool below can be used to setup each channels individually.
noOSC Sketch
The Default sketch allows up to 28 computation nodes to be run. If more are needed for higher stacks then we recommend to use the noOSC sketch. This is the same as the default sketch but Over Serial Configuration (OSC) as been removed to allow up to 40 nodes to be computed. Configuration has to be edited in the sketch.
noOSC Sketch v1.0
noOSC Sketch v1.1
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()
# Remove the trailing carriage return line feed
line = line[:-2]
# Create an array of the data
Z = line.split(' ')
# Print it nicely
if len(Z)>16:
print ("----------")
print (" \tCT1\tCT2\tCT3\tCT4")
print ("Vrms :\t%s\t%s\t%s\t%s" % (Z[1], Z[2], Z[3], Z[4]))
print ("RealPower:\t%s\t%s\t%s\t%s" % (Z[5], Z[6], Z[7], Z[8]))
print ("Irms :\t%s\t%s\t%s\t%s" % (Z[9], Z[10], Z[11], Z[12]))
print ("P Factor :\t%s\t%s\t%s\t%s" % (Z[13], Z[14], Z[15], Z[16]))
except KeyboardInterrupt:
ser.close()To run this first of all make sure you have python-serial package installed
$ sudo apt-get install python-serial
Then run the command below to download the script.
wget lechacal.com/RPICT/example/RPICT4V3_DEMO_02.py.zip unzip RPICT4V3_DEMO_02.py.zip
and run it using
python RPICT4V3_DEMO_02.py
Data Output
3Phase firmware
This is the default from manufacture. Using the three phase firmware the data output is:
NodeID Vrms1 Vrms2 Vrms3 Irms1 Irms2 Irms3 Realpower1 Realpower2 Realpower3 PF1 PF2 PF3
Using this firmware channels can not be modified with the configuration. Power associations are as follow.
RealPower1 -> CT1 & V1
RealPower2 -> CT2 & V2
RealPower3 -> CT3 & V3
Individual Phase firmware
Using the individual phase firmware the data output is:
NodeID Vrms1 Vrms2 Vrms3 Vrms4 Realpower1 Realpower2 Realpower3 Realpower4 Irms1 Irms2 Irms3 Irms4 PF1 PF2 PF3 PF4
Real Powers are computed using the following rules:
RealPower1 -> CT1 & V1
RealPower2 -> CT2 & V2
RealPower3 -> CT3 & V3
RealPower4 -> CT4 & V3
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
$ wget lechacal.com/RPICT/config/B4/rpict4v3_3phase.conf $ lcl-rpict-config.py -w rpict4v3_3phase.conf
These command above will restore the default configuration for a 100A rated board. For all other rating see the corresponding table here.
Then for parameter kcal replace all the 83.33 with the corresponding calibration coefficient found in the table.
Emoncms Config (Emonhub)
Make sure you read this first.
For default configuration.
[[11]]
nodename = RPICT4V3
hardware = RPICT4V3
[[[rx]]]
names = Vrms1,Vrms2,Vrms3,Vrms4,Realpower1,Realpower2,Realpower3,Realpower4,Irms1,Irms2,Irms3,Irms4,PF1,PF2,PF3,PF4
datacode = 0
scales = 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1
units = V,V,V,V,W,W,W,W,mA,mA,mA,mA
Enclosure
Enclosures kit are available as a 3D printed product. Link to the shop.
Both Raspberrypi 3 and 4 format are available.
