RPICT4T4
This page is for board specific information. More information can be found on the generic page for RPICT series.
- 4x AC Current Sensors
- 4x DS18B20 Temperature Sensors
- Attiny84 Mcu
Current Sensor
Recommended sensor: SCT-013-000
Burden Resistor: 24 Ohm
Connector: 3.5mm Jack
Default Voltage for power calculation: 240V (can be modified in firmware).
For AC current only.
Temperature Sensor
Connector: 3.5mm Jack
The intended temperature sensor is the DS18B20 which can be configure in either parasite or normal mode.
The connection to a 3.5mm jack connector is shown below.
NOTE: Raspberrypi must be switched off while connecting and disconnecting the temperature sensor.
Python Example
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/ttyS0', 38400, timeout=1)
try:
while 1:
response = ser.readline()
z = response.split(",")
if len(z)>=6:
print "Power 1: %s Watts" % z[0]
print "Power 2: %s Watts" % z[1]
print "Power 3: %s Watts" % z[2]
print "Power 4: %s Watts" % z[3]
print "Temperature 1: %s C" % z[4]
print "Temperature 2: %s C" % z[5]
print "Temperature 3: %s C" % z[6]
print "Temperature 4: %s C" % z[7][:-2]
except KeyboardInterrupt:
ser.close()