RPICT4V3
This page is for board specific information. More information can be found on the generic page for RPICT series.
- 4x AC current sensor
- 3x AC Voltage sensor.
- Compute real power.
- Fit on Raspberrypi 4 holes mounting pattern.
- Attiny84 Mcu
Recommended sensors
- AC Current sensor: SCT-013-000
- AC Voltage sensor:
- UK: 77DB-06-09
- EU: 77DE-06-09
- US: 77DA-10-09 or STA-4190D
Files
Power Association
The RPICT4V3 computes RealPower using the combination of Voltage and Current sensor.
The 4 RealPower are computed using the following combinations:
RealPower1 -> CT1 and V1
RealPower2 -> CT2 and V2
RealPower3 -> CT3 and V3
RealPower4 -> CT4 and V3
Emoncms Output
Emonhub Config
[[11]]
nodename = RPICT4V3
firmware = RPICT4V3_V1_1.ino
hardware = RPICT4V3
[[[rx]]]
names = Vrms1,Vrms2,Vrms3,Realpower1,Realpower2,Realpower3,Realpower4
datacodes = h, h, h, h, h, h, h
scales = 1,1,1,1,1,1,1
units = V,V,V,W,W,W,W
View the data with Python
Please note the uploaded sketch must have CSV enabled. 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)>=6:
print "Vrm1: %s Volts" % z[0]
print "Vrm1: %s Volts" % z[1]
print "Vrm1: %s Volts" % z[2]
print "RealP 1: %s Watts" % z[3]
print "RealP 2: %s Watts" % z[4]
print "RealP 2: %s Watts" % z[5]
print "RealP 2: %s Watts" % z[6][:-2]
except KeyboardInterrupt:
ser.close()
Sketch Upload
An avr programmer with 6pin ribbon cable is needed for programming. See our programmer called Nanoprog.
There is no jumper to remove to program this board.