RPICT3V1: Difference between revisions
Line 107: | Line 107: | ||
units =W,W,W,mA,mA,mA,V | units =W,W,W,mA,mA,mA,V | ||
Using the default sketch 1.3 and below the output will be <br> | Using the default sketch version 1.3 and below the output will be <br> | ||
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 will be <br> | |||
NodeID Realpower1 Realpower2 Realpower3 Irms1 Irms2 Irms3 Vrms | NodeID Realpower1 Realpower2 Realpower3 Irms1 Irms2 Irms3 Vrms | ||
* RealPower in Watts | * RealPower in Watts |
Revision as of 12:56, 14 February 2019
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
Compatibility
Version | Compatible? |
---|---|
Raspberrypi 1 A | Yes |
Raspberrypi 1 B+ | Yes |
Raspberrypi 2 B | Yes |
Raspberrypi 3 B | Yes |
Raspberrypi 3 B+ | Yes |
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.
(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.)
Recommended sensors
- AC Current sensor: SCT-013-000
- AC Voltage sensor:
- UK: 77DB-06-09
- EU: 77DE-06-09
- US: 77DA-10-09
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 & 1.3.
Configuration over serial for sketch version 2.0.
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.
#!/usr/bin/python import serial ser = serial.Serial('/dev/ttyAMA0', 38400) try: while 1: response = ser.readline() z = response.split(" ") if len(z)>=7: print "RealP 1: %s Watts" % z[1] print "RealP 2: %s Watts" % z[2] print "RealP 3: %s Watts" % z[3] print "Irms 1: %s mA" % z[4] print "Irms 2: %s mA" % z[5] print "Irms 3: %s mA" % z[6] print "Vrms : %s Volts" % z[7][:-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 version 1.3 and below the output will be
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 will be
NodeID Realpower1 Realpower2 Realpower3 Irms1 Irms2 Irms3 Vrms
- RealPower in Watts
- Irms in MilliAmps
- Vrms in Volts
Sketch
Units are sold flashed with sketch for use with Voltage sensor.
Usage with Voltage sensor
Version 1.0
Version 1.1
Version 1.2
Version 1.3
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 1.0
No Voltage Version 1.1
No Voltage Version 1.2
Once the sketch uploaded write the configuration as follow:
$ wget lechacal.com/RPICT/config/A0/rpict3t1.conf $ ./lcl-rpict-config.py -w rpict3t1.conf
* rpict3t1 above is not a tipo
Related Pages
How to calibrate the Voltage Port