View source for RPICT4T4

[[File:IMG_1814_small.png | 300px | right]]

[http://lechacalshop.com/en/internetofthing/15-raspberrypi-4-current-sensor-adaptor-4-temperature-emoncms.html Link to shop]

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]].

* 4x AC Current Sensors
* 4x DS18B20 Temperature Sensors
* Microcontroller: Atmel ATtiny84

=Compatibility=
{| class="wikitable"  
|+
|-
!Version
!Compatible?
|-
|Raspberrypi 1 A
|No
|-
|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.
==Current Sensor==
[[File:IMG_1542_small.png | right | 300px]]
Recommended sensor: SCT-013-000

For AC current only.

==Temperature Sensor==
Connector: 3.5mm Jack

The intended temperature sensor is the DS18B20.

The connector is a 3 way screw terminal connector.

==Configuration==

Starting from sketch version 1.4 the RPICT4T4 is configured over serial.

See general instructions for [[Attiny Over Serial Configuration | configuration over serial]].

==Emoncms Config (Emonhub)==

For default configuration. 

  <nowiki>[[11]]</nowiki>
    nodename = RPICT4T4
    hardware = RPICT4T4
    [[[rx]]]
        names = Power1, Power2, Power3, Power4, T1, T2, T3, T4
        datacode = 0
        scales = 1,1,1,1,1,1,1,1
        units = W,W,W,W,C,C,C,C

==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.

<syntaxhighlight lang="Python" line='line'>
 #!/usr/bin/python2
 import serial
 ser = serial.Serial('/dev/ttyAMA0', 38400)
 
 try:
        while 1:
             # Read one line from the serial buffer
             line = ser.readline()
 
             # Remove the trailing carriage return line feed
             line = line[:-2]
 
             # Create an array of the data
             Z = line.split(' ')
 
             # Print it nicely
             print ("----------")
             for i in range(len(Z)):
                 if i==0:
                     print ("NodeID: %s" % Z[0])
                 elif i in [1,2,3,4]:
                     print ("Power %d: %s W" % (i, Z[i]))
                 else:
                     print ("Temperature %d: %s C" % (i,Z[i]))
                        
 except KeyboardInterrupt:
        ser.close()
</syntaxhighlight>

==Files==

[http://lechacal.com/RPICT/4CT4T/RPICT4T4_v1_6.ino Sketch version 1.6]

[http://lechacal.com/RPICT/4CT4T/RPICT4T4_v2.0.ino Sketch version 2.0]

==Related Pages==

[[Howto_setup_Raspbian_for_serial_read]]

[[How to program an Attiny85 or Attiny84]]


[[File:Rpict4t4_drawing.png]]