RPICT3V1: Difference between revisions

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[[File:IMG_1122_small.png | 300px | right]]
[[File:IMG_0473_small.png | 300px | right]]
[http://lechacalshop.com/en/rpict-series/20-raspberrypi-1x-current-sensor-adaptor-1-voltage-emoncms.html Link to shop]
 
[[File:Cart_logo.jpg | 75px |link=http://lechacalshop.com/en/rpict-series/20-raspberrypi-1x-current-sensor-adaptor-1-voltage-emoncms.html]]


This page is for board specific information. More information can be found on the [[Raspberrypi_Current_and_Temperature_Sensor_Adaptor | generic page for RPICT series]].
This page is for board specific information. More information can be found on the [[Raspberrypi_Current_and_Temperature_Sensor_Adaptor | generic page for RPICT series]].
Line 9: Line 6:
* 3 AC current sensor
* 3 AC current sensor
* 1 AC Voltage sensor.
* 1 AC Voltage sensor.
* Compute real power.
* Compute RealPower, ApparentPower, PowerFactor, Vrms, Irms.
* Fit on Raspberrypi 2 holes mounting pattern.
* Fit on the 2 holes mounting pattern for Raspberrypi.
* Attiny84 Mcu
* Arduino Attiny84 Microcontroller.
 


[[File:Link_to_the_shop.png | link=http://lechacalshop.com/en/rpict-series/20-raspberrypi-1x-current-sensor-adaptor-1-voltage-emoncms.html]]


=Compatibility=
=Compatibility=
[[File:IMG_0586_mod.JPG | 300px | right]]
{| class="wikitable"   
{| class="wikitable"   
|+
|+
Line 24: Line 22:
|Raspberrypi 1 A
|Raspberrypi 1 A
|Yes
|Yes
|-
|Raspberrypi 1 B
|No mounting holes.
|-
|-
|Raspberrypi 1 B+
|Raspberrypi 1 B+
Line 35: Line 36:
|-
|-
|Raspberrypi 3 B+
|Raspberrypi 3 B+
|Yes
|-
|Raspberrypi 4 B
|Yes
|-
|Raspberrypi 5
|Yes
|Yes
|-
|-
|}
|}
* Asus Tinkerboard has been reported to work with RPICT units. Note we wont be able to provide support for the Tinkerboard.


==Notice==
==Notice==


The RPICT3V1 must have a voltage sensor to compute Real Power. If you do not want to use a voltage sensor and prefer using an estimated fixed value then use the [[RPICT3T1]] instead.
The RPICT3V1 must have a voltage sensor to compute Real Power. If you do not want to use a voltage sensor and prefer measuring just current then the [[RPICT3T1]] might be more appropriate.


(Note it is possible to use a different sketch (firmware) to make the RPICT3V1 using estimated voltage. However you will have to flash the unit for that.)
(Note it is possible to use a different sketch (firmware) to make the RPICT3V1 using estimated voltage. However you will have to flash the unit with a special programmer for that.)


==Recommended sensors==
==Recommended sensors==
[[File:IMG_1118_small.png | 300px | right]]
[[File:IMG_0587_mod.JPG | 300px | right]]


* AC Current sensor: SCT-013-000
* AC Current sensor:  
** SCT-013-000
** SCT-019
** SCT-006
** SCT-024 400A/100mA
** SCT-031 600A/100mA
* AC Voltage sensor:  
* AC Voltage sensor:  
** [[ZMPT101B_Module_1x_v2 | ZMPT101B Module]]
** UK: 77DB-06-09
** UK: 77DB-06-09
** EU: 77DE-06-09
** EU: 77DE-06-09
Line 60: Line 75:
See general instructions for configuration below:
See general instructions for configuration below:


[[Attiny Over Serial Configuration | Configuration over serial for sketch version 1.1]].
[[Attiny Over Serial Configuration A2 | Configuration over serial for sketch version 2.0 & 2.1]].


[[Attiny Over Serial Configuration A1 | Configuration over serial for sketch version 1.2 & 1.3]].
Version 2.0 & 2.1 can be configured using the web tool.  


[[Attiny Over Serial Configuration A2 | Configuration over serial for sketch version 2.0]].
[http://lechacal.com/RPICT/config/generator/rpict3v1_v1.0/ Online Config Generator]


==Default Data Output==


==Output Channels==
If you are running an old version of the firmware click on the link below related to your version.


Using the default sketch '''version 1.3''' and below the output is <br>
[[RPICT3V1 Sketch version 1.3 documentation]]
NodeID Realpower1 Realpower2 Realpower3 Irms1 Irms2 Irms3 Vrms
* RealPower in Watts
* Irms in MilliAmps
* Vrms in Volts


Using the default sketch '''version 2.0''' and above the output is <br>
Using the default sketch '''version 2.0''' and above the output is <br>
Line 79: Line 91:
* RealPower in Watts
* RealPower in Watts
* ApparentPower in Watts
* ApparentPower in Watts
* Irms in Amperes
* Irms in Amperes (or Estimated Power if Vest different from 1.0)
* Vrms in Volts
* Vrms in Volts
* PowerFactor without units.
* PowerFactor without units.
With sketch '''version 2.0 & 2.1''' and above some channels can be disabled. See this page for more info.
[[RPICT3V1 Disable channels sketch 2]]
==Restore Default Config==
You should have received a key when acquiring the unit. Use this key to download and restore the default configuration.<br>
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


==View the data with Python==
==View the data with Python==
Line 92: Line 115:
Then copy the following into an executable file and run it.
Then copy the following into an executable file and run it.


  #!/usr/bin/python
This is below for '''sketch 2.0''' and above.
<syntaxhighlight lang="python">
  #!/usr/bin/python3
  import serial
  import serial
  ser = serial.Serial('/dev/ttyAMA0', 38400)
  ser = serial.Serial('/dev/ttyAMA0', 38400)
Line 98: Line 123:
  try:
  try:
         while 1:
         while 1:
                response = ser.readline()
            # Read one line from the serial buffer
                z = response.split(" ")
            line = ser.readline().decode().strip()
                if len(z)>=7:
                        print "RealP 1: %s Watts" % z[1]
            # Create an array of the data
                        print "RealP 2: %s Watts" % z[2]
            Z = line.split(' ')
                        print "RealP 3: %s Watts" % z[3]
                        print "Irms 1: %s mA" % z[4]
            # Print it nicely
                        print "Irms 2: %s mA" % z[5]
            if len(Z)>15:
                        print "Irms 3: %s mA" % z[6]
                print ("----------")
                        print "Vrms  : %s Volts" % z[7][:-2]
                print ("          \tCT1\tCT2\tCT3")
                print ("RealPower:\t%s\t%s\t%s" % (Z[1], Z[6], Z[11]))
                print ("AppaPower:\t%s\t%s\t%s" % (Z[2], Z[7], Z[12]))
                print ("Irms    :\t%s\t%s\t%s" % (Z[3], Z[8], Z[13]))
                print ("Vrms    :\t%s\t%s\t%s" % (Z[4], Z[9], Z[14]))
                print ("PowerFact:\t%s\t%s\t%s" % (Z[5], Z[10], Z[15]))
                       
  except KeyboardInterrupt:
  except KeyboardInterrupt:
         ser.close()
         ser.close()
</syntaxhighlight>
To get the above example just enter the command below.
wget lechacal.com/RPICT/example/RPICT3V1_DEMO.py.zip
unzip RPICT3V1_DEMO.py.zip
and run it using
python3 RPICT3V1_DEMO.py


==Emoncms Config (Emonhub)==
==Emoncms Config (Emonhub)==


For default configuration.
For default configuration with sketch '''version 2.0''' and above.


   <nowiki>[[11]]</nowiki>
   <nowiki>[[11]]</nowiki>
Line 119: Line 158:
     hardware = RPICT3V1
     hardware = RPICT3V1
     [[[rx]]]
     [[[rx]]]
       names = RP1, RP2, RP3, Irms1, Irms2, Irms3, Vrms
       names = RP1, AP1, Irms1, Vrms1, PF1, RP2, AP2, Irms2, Vrms2, PF2, RP3, AP3, Irms3, Vrms3, PF3
       datacode = 0
       datacode = 0
       scales = 1,1,1,1,1,1,1
       scales = 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1
       units =W,W,W,mA,mA,mA,V
       units = W,W,A,V,.,W,W,A,V,.,W,W,A,V,.
 
 
[[File:rpict3v1_channel_emoncms.png]]


==Sketch==
==Sketch==


Units are sold flashed with sketch for use with Voltage sensor.
Units are sold flashed with sketch for use with a Voltage sensor.


===Usage with Voltage sensor===
===Usage with Voltage sensor===


[http://lechacal.com/RPICT/CT3V1/RPICT3V1_v1_0.ino Version 1.0]<br>
[http://lechacal.com/RPICT/CT3V1/RPICT3V1_v2_0.ino Version 2.0]<br>
[http://lechacal.com/RPICT/CT3V1/RPICT3V1_v1_1.ino Version 1.1]<br>
[http://lechacal.com/RPICT/CT3V1/RPICT3V1_v2.1.ino Version 2.1]<br>
[http://lechacal.com/RPICT/CT3V1/RPICT3V1_v1_2.ino Version 1.2]<br>
[http://lechacal.com/RPICT/sketch/RPICT3V1_v2.2.ino Version 2.2] [http://lechacal.com/RPICT/sketch/RPICT3V1_v2.2.ino hex]→ current default for sold units.<br>
[http://lechacal.com/RPICT/CT3V1/RPICT3V1_v1_3.ino Version 1.3]


===Usage without Voltage sensor===
===Usage without Voltage sensor===
If you wish to use the board without using the voltage sensor use the sketch below. Note power will be estimated power only using fixed voltage setup in configuration.<br>
If you wish to use the board without using the voltage sensor use the sketch below. Note power will be estimated power only using fixed voltage setup in configuration.<br>
[http://lechacal.com/RPICT/CT3V1/RPICT3V1_noV_v1_0.ino No Voltage Version 1.0]<br>
[http://lechacal.com/RPICT/CT3V1/RPICT3V1_noV_v2.0.ino No Voltage Version 2.0]
[http://lechacal.com/RPICT/CT3V1/RPICT3V1_noV_v1_1.ino No Voltage Version 1.1]<br>
[http://lechacal.com/RPICT/CT3V1/RPICT3V1_noV_v1_2.ino No Voltage Version 1.2]


Once the sketch uploaded write the configuration as follow:
Once the sketch uploaded write the configuration as follow:


  $ wget lechacal.com/RPICT/config/A0/rpict3t1.conf
  $ wget lechacal.com/RPICT/config/A2/rpict3v1.conf
  $ ./lcl-rpict-config.py -w rpict3t1.conf
  $ lcl-rpict-config.py -w rpict3v1.conf
<small>* rpict3'''t'''1 above is not a tipo</small>
<small>Output will be in AMps. Change VEST in config from 1 to 240 or 110 to get estimated power.</small>
 
==CAD Drawing==
 
[[File:Rpict3v1_drawing_01.png | 300px]]


==Related Pages==
==Related Pages==
[[Howto setup Raspbian for serial read]]
[[Gen3_Passive_Component_Setup]]
[[How to calibrate the Voltage Port]]
[[How to calibrate the Voltage Port]]
[[How to program an Attiny85 or Attiny84]]


[[Use Emonhub with RPICT]]
[[Use Emonhub with RPICT]]


[[Howto setup rpi3 for CSV reading]]
[[Flash RPICT Attiny84 with Arduino UNO]]
 
==FAQ==
 
More generic FAQ are here.
[[Frequently Asked | Frequently Asked Questions]]
 
===Why are there 3 Vrms output for only 1 Voltage port?===
The RPICT3V1 computes power using associated pairs for Current/Voltage (CV pairs). The result of this computation gives Vrms Irms ActivePower etc.
The CV pairs in the RPICT3V1 are <br>
P1-> CT1/V1<br>
P2-> CT2/V1<br>
P3-> CT3/V1<br>
 
The output reports the result of Vrms for each of these computation. We do expect the three Vrms values to be the nearly the same with a small diffrence because there are computed at a different time.
 
In practice for voltage monitoring you should just use one of the three Vrms.


[[How to program an Attiny85 or Attiny84]]
However if you need to know precisely which Vrms was used when computing a given Active Power then make sure you compare it against the Vrms it is associated with.

Latest revision as of 12:47, 11 November 2023

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 RealPower, ApparentPower, PowerFactor, Vrms, Irms.
  • Fit on the 2 holes mounting pattern for Raspberrypi.
  • Arduino Attiny84 Microcontroller.

Compatibility

Version Compatible?
Raspberrypi 1 A Yes
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
  • Asus Tinkerboard has been reported to work with RPICT units. Note we wont be able to provide support for the Tinkerboard.

Notice

The RPICT3V1 must have a voltage sensor to compute Real Power. If you do not want to use a voltage sensor and prefer measuring just current then the RPICT3T1 might be more appropriate.

(Note it is possible to use a different sketch (firmware) to make the RPICT3V1 using estimated voltage. However you will have to flash the unit with a special programmer for that.)

Recommended sensors

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

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 2.0 & 2.1.

Version 2.0 & 2.1 can be configured using the web tool.

Online Config Generator

Default Data Output

If you are running an old version of the firmware click on the link below related to your version.

RPICT3V1 Sketch version 1.3 documentation

Using the default sketch version 2.0 and above the output is 

NodeID Realpower1 ApparentPower1 Irms1 Vrms1 PowerFactor1 Realpower2 ApparentPower2 Irms2 Vrms2 PowerFactor2 Realpower3 ApparentPower3 Irms3 Vrms3 PowerFactor3
  • RealPower in Watts
  • ApparentPower in Watts
  • Irms in Amperes (or Estimated Power if Vest different from 1.0)
  • Vrms in Volts
  • PowerFactor without units.

With sketch version 2.0 & 2.1 and above some channels can be disabled. See this page for more info. RPICT3V1 Disable channels sketch 2

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

View the data with Python

Please note the configuration must have Emonhub format enabled (format=3). 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.

This is below for sketch 2.0 and above. 

 #!/usr/bin/python3
 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)>15:
                 print ("----------")
                 print ("          \tCT1\tCT2\tCT3") 
                 print ("RealPower:\t%s\t%s\t%s" % (Z[1], Z[6], Z[11]))
                 print ("AppaPower:\t%s\t%s\t%s" % (Z[2], Z[7], Z[12]))
                 print ("Irms     :\t%s\t%s\t%s" % (Z[3], Z[8], Z[13]))
                 print ("Vrms     :\t%s\t%s\t%s" % (Z[4], Z[9], Z[14]))
                 print ("PowerFact:\t%s\t%s\t%s" % (Z[5], Z[10], Z[15]))
 
                        
 except KeyboardInterrupt:
        ser.close()

To get the above example just enter the command below. 

wget lechacal.com/RPICT/example/RPICT3V1_DEMO.py.zip
unzip RPICT3V1_DEMO.py.zip

and run it using 

python3 RPICT3V1_DEMO.py

Emoncms Config (Emonhub)

For default configuration with sketch version 2.0 and above. 

 [[11]]
   nodename = my_RPICT3V1
   hardware = RPICT3V1
   [[[rx]]]
      names = RP1, AP1, Irms1, Vrms1, PF1, RP2, AP2, Irms2, Vrms2, PF2, RP3, AP3, Irms3, Vrms3, PF3
      datacode = 0
      scales = 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1
      units = W,W,A,V,.,W,W,A,V,.,W,W,A,V,.

Sketch

Units are sold flashed with sketch for use with a Voltage sensor.

Usage with Voltage sensor

Version 2.0
Version 2.1
Version 2.2 hex→ current default for sold units.

Usage without Voltage sensor

If you wish to use the board without using the voltage sensor use the sketch below. Note power will be estimated power only using fixed voltage setup in configuration.
No Voltage Version 2.0

Once the sketch uploaded write the configuration as follow: 

$ wget lechacal.com/RPICT/config/A2/rpict3v1.conf
$ lcl-rpict-config.py -w rpict3v1.conf

Output will be in AMps. Change VEST in config from 1 to 240 or 110 to get estimated power.

CAD Drawing

Related Pages

Howto setup Raspbian for serial read

Gen3_Passive_Component_Setup

How to calibrate the Voltage Port

How to program an Attiny85 or Attiny84

Use Emonhub with RPICT

Flash RPICT Attiny84 with Arduino UNO

FAQ

More generic FAQ are here. Frequently Asked Questions

Why are there 3 Vrms output for only 1 Voltage port?

The RPICT3V1 computes power using associated pairs for Current/Voltage (CV pairs). The result of this computation gives Vrms Irms ActivePower etc. The CV pairs in the RPICT3V1 are
P1-> CT1/V1
P2-> CT2/V1
P3-> CT3/V1

The output reports the result of Vrms for each of these computation. We do expect the three Vrms values to be the nearly the same with a small diffrence because there are computed at a different time.

In practice for voltage monitoring you should just use one of the three Vrms.

However if you need to know precisely which Vrms was used when computing a given Active Power then make sure you compare it against the Vrms it is associated with.

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