Unipi technology UniPi technical documentation

UniPi
technical
documentation

REV 1.1

UniPi

Contents

Overview.................................................................................................................................................. 2

Description .............................................................................................................................................. 3

GPIO port map ..................................................................................................................................... 4

Power Requirements ........................................................................................................................... 5

Connecting Raspberry Pi to UniPi ........................................................................................................ 5

Building blocks ......................................................................................................................................... 5

Relays................................................................................................................................................... 5

Digital Inputs ....................................................................................................................................... 5

5-12V Step-up (internal 12V power supply) .................................................................................... 6

Jumper settings ............................................................................................................................... 6

Analog Inputs ....................................................................................................................................... 6

EEPROM ............................................................................................................................................... 7

Analog Output ..................................................................................................................................... 7

1Wire sensors ...................................................................................................................................... 8

UART .................................................................................................................................................... 8

2

C ports ............................................................................................................................................... 9

I

Technical parameters ............................................................................................................................ 10

2

Onboard I

Relays................................................................................................................................................. 10

Digital Inputs ..................................................................................................................................... 10

Analog Output ................................................................................................................................... 10

Power Requirements ......................................................................................................................... 10

Dimensions ........................................................................................................................................ 10

Revision History ..................................................................................................................................... 11

Changes ............................................................................................................................................. 11

C ICs .................................................................................................................................. 10

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UniPi

Overview

UniPi is an add-on board for the Raspberry Pi (RPi). It features many components such as 12 (+2)
digital inputs with LED signalization, two 0-10V analog inputs, one 0-10V analog output, changeover
relays, single channel 1wire master controller and a real-time clock module.

The two digital inputs 13,14 and the I2C_0 bus are meant to connect via the P5 header of RPi B (only)
which is no longer available on newer Raspberry Pis (B+ and newer).

We provide basic open-source Python library for interfacing the UniPi available on GitHub
recommended to use.

There are also many platforms and libraries that are compatible with UniPi:

• REX

• FHEM – Home automation GNU/GPL v.2 Perl server

• Wyliodrin – Online visual programming service

• HomeSeer – Another home automation system

• Others… See www.unipi.technology

UniPi is fully compatible with Raspberry Pi (models A, A+, B, B+, B+ model 2) and mounting-hole
compatible with BeagleBone Black. However we do not provide support for BeagleBone.

Please note the UniPi is only compatible with Raspberry Pi model B rev 2. Connecting model B rev. 1
is also possible provided checking the Raspberry Pi official documentation.

– Industrial PLC automation tool

which is

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Description

Figure 1 - The UniPi

Major building blocks of UniPi:

• Relays: 8 relays 250VAC@5A or 24VDC@5A – control switching elements

• UART port: Standard serial port to connect serial console or many other devices (NFC

readers, … )

• 1Wire port: Provides 1Wire bus interface to connect 1Wire devices such as temperature and

humidity sensors

• I2C port: For connecting other extension modules for example relay or analog output

modules

• I2C configuration pins: To connect the I2C_0 bus from the RPi (only for advanced users)

• RTC (Real Time Clock) module: Provides real time in case of internet or power outage

(backup battery not included in the package).

• Power 5V: 2.1mm connector for power supply

• RPI connector: 26-pin connector for Raspberry Pi

• Digital inputs: 12(+2) galvanically isolated digital inputs for reading signals from external

devices

• 12V out: Power supply 12V@200mA - only for use with digital inputs of the UniPi

• Configurable ports: To configure digital inputs for use with external power source

• Analog in: Two 0-10V analog inputs for reading analog signals from external devices

• Analog out: One 0-10V analog output for proportional controlling

• AO trimmer: For precise adjustment of the analog output

UniPi

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