RPICT7V1 Version 5

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RPICT7V1 Version 5

Link to the shop.png

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

IMG 0411 small.png
  • 7 AC current sensors.
  • 1 AC Voltage sensor.
  • Measure RMS Current and Voltage, Active power, Apparent Power, Reactive Power, Frequency, Power Factor.
  • Fit on Raspberrypi 4 holes mounting pattern.
  • AtMega328 Mcu (Arduino UNO)
  • MCP3208 12 bit ADC
  • Stackable with RPICT8 Slave.


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
  • Asus Tinkerboard has been reported to work with RPICT units. Note we wont be able to provide support for the Tinkerboard.

Recommended sensors

IMG 0414 small.png
  • AC Current sensor:
    • SCT-013-000
    • SCT-019
    • SCT-006
    • SCT-024 400A/100mA
    • SCT-031 600A/100mA
  • AC Voltage sensor:


Stacking Configuration

IMG 0980 small.png

General stacking information is described in the RPICT stacking page. RPICT_Stacking Version 5

Software Configuration

Legacy firmware

For any units ordered before the 1st of July 2022 the firmware version is version 3. Follow this link below for configuration. If possible upgrade to firmware version 4.
Before 1st July 22 RPICT7V1 Configuration
Upgrading to sketch version 4

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.


You can now access the Raspberrypi configuration server if you point your browser to the link below


You can now edit the configuration.

Screenshot 2021-11-01 20-22-56.png

An online version of this web interface exists on this link below.


Configuration via command line

The documentation for serial configuration can be found on this page.

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


Unit are sold with the sketch below already loaded.

Default Sketch V4.1.0.

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_MCP3208_v4.1.0.ino.hex
lcl-upload-sketch RPICT_MCP3208_v4.1.0.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)
       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)>15:
                print ("----------")
                print ("Vrms:\t%s" % Z[15])
                print ("          \tCT1\tCT2\tCT3\tCT4\tCT5\tCT6\tCT7") 
                print ("RealPower:\t%s\t%s\t%s\t%s\t%s\t%s\t%s" % (Z[1], Z[2], Z[3], Z[4], Z[5], Z[6],$
                print ("Irms     :\t%s\t%s\t%s\t%s\t%s\t%s\t%s" % (Z[8], Z[9], Z[10], Z[11], Z[12], Z[$
 except KeyboardInterrupt:

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/RPICT7V1_DEMO_02.py.zip
unzip RPICT7V1_DEMO_02.py.zip

and run it using

python RPICT7V1_DEMO_02.py

Data Output

Using the manufacture firmware the data output is:

NodeID RP1 RP2 RP3 RP4 RP5 RP6 RP7 Irms1 Irms2 Irms3 Irms4 Irms5 Irms6 Irms7 Vrms

RP1 is Real Power 1 from CT1 Irms is the rms current on CT1 Vrms is the rms voltage

Real Powers are computed using the following rules:

RealPower1 -> CT1 & V1
RealPower2 -> CT2 & V1
... and so on.

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
  • Frequency
  • Reactive 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 -w XXXX.conf

Emoncms Config (Emonhub)

Make sure you read this first.

For default configuration. Used as single board only (not stacked).

   nodename = my_RPICT7V1
   hardware = RPICT7V1
      names = RP1, RP2, RP3, RP4, RP5, RP6, RP7, Irms1, Irms2, Irms3, Irms4, Irms5, Irms6, Irms7, Vrms
      datacode = 0
      scales = 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1
      units =W,W,W,W,W,W,W,mA,mA,mA,mA,mA,mA,mA,V

Rpict7v1 channels 001.png


Enclosures kit are available as a 3D printed product. Link to the shop.

Both Raspberrypi 3 and 4 format are available.


Related Pages

Howto setup Raspbian for serial read


How to calibrate the Voltage Port

Update RPICT firmware (CT7V1/CT4V3/CT8)

Use Emonhub with RPICT