UUGear Zero2Go Omini Bedienungsanleitung

Zero2Go Omini

Wide Input Range, Multi-Channel Power supply for Raspberry Pi

User Manual (revision 1.01)

Table of Content

Product Overview.............................................................................................. 1

What is in the Package?.................................................................................... 3

Zero2Go Omini Specifications........................................................................... 4

Software Installation.......................................................................................... 5

Software Update/Uninstallation.......................................................................... 6

Mounting Zero2Go on Raspberry Pi Zero.......................................................... 7

Mounting Zero2Go on Other Raspberry Pi Models............................................ 8

Connecting Power Supplies............................................................................. 10

Software Usage................................................................................................11

1. Set Default State.............................................................................. 12

2. Set Blinking Interval ......................................................................... 12

3. Set Power Cut Delay........................................................................ 12

4. Set Low Voltage Threshold............................................................... 12

5. Set Recovery Voltage Threshold...................................................... 13

6. Set Step-Down Engine Always-On................................................... 13

7. Exit................................................................................................... 14

Ghost Voltage.................................................................................................. 14

Work as Uninterruptible Power Supply (UPS).................................................. 15

Hardware Hackings......................................................................................... 15

1. Interface with different Power Supplies ............................................ 15

2. Change the Pin Used by Zero2Go Omini ......................................... 17

3. Modify and Upload Firmware............................................................ 18

Zero2Go Omini Log Files................................................................................. 19

Frequently Asked Questions (FAQ) ................................................................. 20

1. What I2C Address is Used by Zero2Go Omini? ................................ 20

2. What I2C Registers Are Provided by Zero2Go Omini?...................... 20

3. What GPIO Pins Are Used by Zero2Go Omini?................................ 23

4. Is Zero2Go Omini Compatible with “Other Hardware”? .................... 24

5. How to Understand the Color of LED on Zero2Go Omini? ............... 24

Revision History............................................................................................... 26

Product Overview

Zero2Go is a Raspberry Pi Zero sized (or pHAT shape) extension board that can work

as wide input range power supply for Raspberry Pi. Zero2Go Omini is the second

member in the Zero2Go family.

Zero2Go Omini supports all Raspberry Pi models that has the 40-pin GPIO header,

including A+, B+, 2B, 3B, 3B+, Zero and Zero W.

The main features of Zero2Go Omini include:

Three separated input channels (each accepts 3.5~28V DC).

Auto step-up or step-down to output 5V for powering Raspberry Pi.

Auto switch input channel (one with highest voltage takes the priority).

Gracefully turn on/off Raspberry Pi with single tap on the button.

Fully cuts power for Raspberry Pi and all its USB peripherals after shutdown.

Long hold the button to force power cut, when OS loses response.

Monitor the input voltage on each channel (via software).

Shutdown Raspberry Pi when input voltage below preset threshold.

Recover Raspberry Pi when input voltage exceed preset threshold.

Zero2Go has quite wide input range (3.5V~28V), so it is convenient to power your

Raspberry Pi with power bank, Li-Po battery pack, solar panel, car battery or different

kinds of power adapters etc. You can also configure it as a UPS.

The board size of Zero2Go is exactly the same with Raspberry Pi Zero (W), and can

be mounted on Raspberry Pi Zero or other Raspberry Pi models that have 40-pin

header.

How does it work? Please see below the simplified diagram. It demonstrates the main

functionalities of Zero2Go Omini and can help you to understand how it works.

Three input channels (A, B and C) are merged as Vin with 3 schottky diodes. The

comparator will compare Vin with an internal reference and decide whether to use

step-up or step-down engine. When Vin is lower than 5.5V, the step-up engine will be

used; When Vin is 5.5V or higher, the step-down engine will be used instead. The

outputs of both engines are also merged with 2 schottky diodes.

The voltage on each input channel can be measured by ADC (analog-to-digital

converter) and the result can be queried via I2C interface.

Zero2Go Omini also has built-in low-voltage protection, which can gracefully

shutdown your Raspberry Pi when input voltage is too low. This feature can be

enabled via Zero2Go Omini Console. Please read Software Usage chapter for more

information.

The picture below shows how Zero2Go Omini looks like:

1) Micro USB connector for input channelA

2) XH2.54-2P connector for input channel B

3) Universal wire connector for input channel C.

4) Tact button to turn on/off Raspberry Pi.

5) Three-color LED (red, green, blue) as action indicator.

6) 2x20-pin header (connects to Raspberry Pi).

What is in the Package?

Each Zero2Go Omini package contains:

Zero2Go Omini board x 1

M2.5 x 10mm plastic screw x 4

4mm spacer x 4

M2.5 plastic nut x 4

Zero2Go Omini Specifications

Dimension:

65mm x 30mm x 7.7mm

Weight

12g (net weight)

Mainly Used Chips

MCU: ATtiny841 (datasheet)

DC-DC Bulk: MP4462 (datasheet)

DC-DC Boost: SDB628 (datasheet)

LED Indicator

Three-color LED (red, green and blue)

Interface

Micro USB female connector for input channel A.

XH2.54-2P connector for input channel B.

Universal wire connector for input channel C.

20x2 header (h=2mm) for connecting Raspberry Pi.

Input

Three separated channels (A, B, and C)

All accept DC 3.5V~28V (5.5~7.0V is not recommended

as the DC-DC converter needs more dropout to work well)

Output

Output 5V (±5%), maximum 2A

Efficiency

Up to 87% @ Step-Up mode

Up to 82% @ Step-Down mode

Standby Current

~0.13mA @ Vin=3.5V

~0.36mA @ Vin=12V

~0.87mA @ Vin=28V

Operating Temperature

-30℃~80℃(-22F~176F)

Storage Temperature

-40℃~85℃(-40F~185F)

Humidity

0~80%RH, no condensing

Software Installation

We strongly recommend to install the software before physically mount Zero2Go

Omini on your Raspberry Pi.

You will need to have your Raspberry Pi connected to the Internet. The installation

will be very simple if you run our installing script. The wiringPi utility is required by

the software so the script will install it for you, if you haven’t done so before.

First step is to run this command in your home directory:

If your Raspberry Pi has internet connection, it will immediately download the script

from our website, and you will then see the “installZero2Go.sh”script in your home

directory. You can then run it with sudo:

Please notice that sudo is necessary to run this script, because it will copy file to the

/etc/init.d/ directory as well. This script will automatically do these tasks in sequence:

1. Enable I2C on your Raspberry Pi

2. Install i2c-tools, if it is not installed yet

3. Configure Bluetooth to use mini-UART

4. Install wiringPi, if it is not installed yet

5. Install Zero2Go programs, if they are not installed yet

You can also manually install these packages and make those configurations, if you

prefer to. After the installation, please remember to reboot your Raspberry Pi.

You will see a new “zero2go”directory, and it contains 2 runnable files:

pi@raspberrypi ~ $ wget http://www.uugear.com/repo/Zero2GoOmini/installZero2Go.sh

pi@raspberrypi ~ $ sudo sh installZero2Go.sh

pi@raspberrypi ~ $ cd zer2go

pi@raspberrypi ~ /zero2go $ ls

daemon.sh init.sh utilities.sh zero2go.sh

Although the daemon.sh is runnable, you should not run it manually. The installing

script has registered it into /etc/init.d and it will run automatically after the boot.

The zero2go.sh is the software that allows you to monitor the working status of

Zero2Go and make configuration interactively. Please see the “Software Usage”

chapter for more information.

Now the software has been installed, and you will need to physically mount Zero2Go

Omini on your Raspberry Pi.

Software Update/Uninstallation

If you want to update the software to newer version, you don’t have to uninstall it

first. Just remove or rename your “zero2go” directory and repeat the installing

process, then you are all set.

If you prefer to completely remove the software, besides removing the “zero2go”

directory, you should also remove the “/etc/init.d/zero2go_daemon” file. There are

some dependencies (such as wiringPi, i2c-tools etc.), who are installed during the

software installation. In the majority of cases you don’t have to remove them, but if

you wish, you can check the content of “installZero2Go.sh”script and do the reverse.

pi@raspberrypi ~ $ mv zero2go zero2go.bak

pi@raspberrypi ~ $ wget http://www.uugear.com/repo/Zero2GoOmini/installZero2Go.sh

pi@raspberrypi ~ $ sudo sh installZero2Go.sh

Mounting Zero2Go on Raspberry Pi Zero

If you want to use Zero2Go Omini on Raspberry Pi Zero (V1.2, V1.3 or W), you will

need to solder the 20x2 pin male header (not included in the package) on it first, or

you can buy one with the header pre-soldered.

You can simply mount Zero2Go Omini on your Raspberry P Zero’s 40-pin header,

and it can work immediately. However, if you wish, you can use the plastic screws,

spacers and nuts (included in the package) to tightly mount Zero2Go Omini on your

Raspberry Pi Zero. Please make sure NOT to put Zero2Go up side down, the 40 pins

should connect to the female header via the holes underneath, as shown in figure

below.

Andere Handbücher für Zero2Go Omini

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