RPI T8

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Link to shop

This page is for board specific information. More information can be found on the generic page for RPICT series.

  • 8 Temperature ports for DS18B20
  • Fit on Raspberrypi 4 holes mounting pattern.
  • AtMega328 Mcu (Arduino UNO)
  • Stackable

Compatibility

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.

Recommended sensors

  • DS18B20

The RPI_T8 has 8 ports readily available for connection with a DS18B20. Note that more than 8 probes can be used by connecting several probe to a single port.

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Stacking Information

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The RPI_T8 can be used on its own or stacked on top of RPICT7V1 RPICT4V3 or RPICT8 Version 3 (support for version 5 is still to be designed).

The RPI_T8 must be slave number 1. i.e. First jumper set as slave. Microcontroller must be removed from the board to operate as slave.

RPI_T8 must be the top unit in any stack. This is due to the screw terminal which won't be accessible if not at the top.

General stacking information is described in the RPICT stacking page.
RPICT_Stacking

Limitations. The default sketch normally allows up to 28 Current/Voltage pairs to be executed. This lowered to 16 when using the RPI_T8 in the stack.


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Software Configuration

As Master

The RPI_T8 uses the same configuration structure as other master hardware. However only nodeid and polling have any effect.

Over Serial Configuration - Sketch 3.0

The data output as master has the following format:

nodeid T1 T2 T3 T4 ...

Note the order of the temperature probe appearing does not depend on which port they are connected but on the address of the DS18B20 probe.

The know the address of the probe use the cat command to output the data stream and perform a reset of the board. At boot up all addresses of found probes will appear.

As Slave

The documentation for serial configuration can be found on this page.

Over Serial Configuration - Sketch 3.0

To enable temperature just add a single channel as temperature. All detected probe will be sent on output one after the other.

Online config 01.png The board can be configured with the online configurator.

Files

Sketch

Master Sketch

RPI_T8_v1.0

Slave Sketch

In order to use the RPI_T8 as slave the master board must be flashed with the sketch below with temperature support enabled. To enable Temperature support uncomment line 10 in the sketch. Remove the two slashes in the following line.

//#define TEMPERATURE_SUPPORT

Default Sketch V3.0.2.


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