EP-0136

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Revision as of 12:06, 1 February 2021 by Yoyojacky (talk | contribs) (Features)
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UPS Plus

UPS V2 1.jpg

Descriptions

UPS Plus is a new generation of UPS power management module.

Compatibility

Raspberry Model Compatibility
Raspberry Pi A YES
Raspberry Pi A+ YES
Raspberry Pi B YES
Raspberry Pi B+ YES
Raspberry Pi 2B YES
Raspberry Pi 3B YES
Raspberry Pi 3B+ YES
Raspberry Pi 4B YES
Raspberry Pi Zero YES
Raspberry Pi Zero W YES

Features

  • Easy to install
  • Enhanced power management
  • Remote OTA firmware upgrade
  • Programmable BACK-TO-AC auto power up
  • Programmable sample period
  • I2C communication
  • Standalone RTC
  • Support stacked battery design

Specifications

  • Current/voltage monitoring of Raspberry Pi power supply port.
  • Battery terminal current/voltage monitoring, supports two-way monitoring of charge and discharge.
  • Independent RTC function.
  • OTA function (supports forced upgrade mode and active upgrade mode).
  • Power estimation
Note: At least one full charge and discharge cycle must be completed!)
  • Adjustable sampling period.
  • Support FCP, AFC, SFCP fast charge protocol.
  • Support BC1.2 charging protocol.
  • Battery temperature monitoring
Note: the forced temperature protection cannot be turned off, threshold: 65 degrees!
  • Programmable Power Voltage Detector(PVD) function, Default value: 3.6V
  • Incoming call self-start function.
  • Power down memory function.
  • Programmable shutdown / forced restart.
  • Running time statistics
  • Electrostatic protection.
  • Linear compensation range discharge capacity: 5V 4.5A.
  • Non-linear compensation range discharge capacity: 5V 8A.
  • Charging capacity 4.5V 5A/5V 2.5A/9V 2A/12V 1.5A.
  • Stacked battery design
NOTE: Stacked power board need to be special accessories.Can not support None official accessories.
  • Use I2C communication without occupying additional ports.
  • Support 4.2V 4.35V 4.4V 4.5V lithium battery
Note: Different types of batteries cannot be mixed!
  • After-sales data telemetry.

Register Mapping

USB Plus V5.0 Register Mapping Chart

  • 0x17 - Operation Mode
Address Function Range Unit
0x01 - 0x02 Voltage of UPS's MCU 2400 - 3600 mV
0x03 - 0x04 Voltage of Pogopin's Bottom 0 - 5500 mV
0x05 - 0x06 Voltage of Batteries' Terminal 0 - 4500 mV
0x07 - 0x08 Voltage of USB-C Charging Port 0 - 13500 mV
0x09 - 0x0A Voltage of MicroUSB Charging Port 0 - 13500 mV
0x0B - 0x0C Batteries Temperature -20 - 65
0x0D - 0x0E Full Voltage 0 - 4500 mV
0x0F - 0x10 Empty Voltage 0 - 4500 mV
0x11 - 0x12 Protection Voltage 0 - 4500 mV
0x13 - 0x14 Battery Remaining 0 - 100 %
0x15 - 0x16 Sample Period 1 - 1440 Min
0x17 Power Status/Operation Mode 0/1 Bool
0x18 Shutdown Countdown 0/1 - 255 Bool/Sec
0x19 Back-To-AC Auto Power up 0/1 Bool
0x1A Restart Countdown 0/1 - 255 Bool/Sec
0x1B Reset to Factory Defaults 0/1 Bool
0x1C - 0x1F Cumulative Running Time 0 - 2147483647 Sec
0x20 - 0x23 Accumulated Charging Time 0 - 2147483647 Sec
0x24 - 0x27 Running Time 0 - 2147483647 Sec
0x28 - 0x29 Version 1 Fixed
0x2A - 0xEF [Reserved] NA NA
0xF0 - 0xFB Serial Number Device UID Fixed
0xFC - 0xFF Factory Testing NA NA
  • 0x18 - OTA Firmware Upgrade Mode
Address Function
0x01 - 0x10 Encrypted buffer
0x11 - 0xEF [Reserved]
0xF0 - 0xFB Serial Number
0xFC - 0xFF Factory Test

Gallery

  • Product Outlook
UPS V2 1.jpg
UPS V2 2.jpg
UPS V2 3.jpg
  • Application scenario
UPS V2 4.jpg


PCB Drawing

Function Area Display

  • Function Details
UPS V2 10.jpg
UPS V2 11.jpg
UPS V2 12.jpg

LED light status definition

  • Discharge Status
Power C(%) LED1 LED2 LED3 LED4
C >= 75% ON ON ON ON
50% <= C <75% ON ON ON OFF
25% <= C <50% ON ON OFF OFF
0% <= C < 25% ON OFF OFF OFF
Wrong Batteries Parameters 1.5Hz Blinking OFF OFF OFF


  • Charging Status
Power C(%) LED1 LED2 LED3 LED4
100% ON ON ON ON
75% <= C ON ON ON 1.5Hz Blink
50% <= C <75% ON ON 1.5Hz Blink OFF
25% <= C < 50% ON 1.5Hz Blink OFF OFF
C < 25% 1.5Hz Blinking OFF OFF OFF

How To Assemble

  • How to Assemble
UPS V2 5.jpg
UPS V2 6.jpg
UPS V2 7.jpg
UPS V2 8.jpg

How To Use

Automatic Shutdown Protection

  • Download the latest Raspbian OS image from: [ https://www.raspberrypi.org/software/operating-systems/ ]
  • Unzip it and flash it to MicroSD card(TF card) with Etcher imaging tool. [ https://www.balena.io/etcher/ ]
  • Follow the installation method to assemble the Raspberry Pi and UPS Plus.
  • After booting up and make sure Raspberry Pi can access internet.
  • Open a terminal by press "Ctrl+ALT+T" or just click terminal icon on the task bar.
curl -Lso- https://git.io/JLygb

or

curl -Lso- https://raw.githubusercontent.com/geeekpi/upsplus/main/install.sh | bash
  • When encountering low battery, it will automatically shut down and turn off the UPS and it will restart when AC power comes.

How To Update UPS Firmware via OTA

  • Enter the OTA firmware upgrade mode:

Method 1

NOTE: Do not power off or disconnect the network during the upgrade process. If the upgrade fails, the UPS Pro will not work normally.

  • Power off the Raspberry Pi.
  • Cut off the external charging power (MicroUSB and USB-C)
  • Take out all the batteries.
  • Press and hold the UPS Pro switch key and insert the battery into the battery compartment.

At this time, the device will be forced to enter OTA mode.

The function of the switch button will no longer be available at this time.

The Raspberry Pi will be running and please execute the following python script in the system terminal to complete the upgrade.

  • Download python scripts from github:
cd ~
git clone https://github.com/geeekpi/upsplus.git
cd ~/upsplus
python3 OTA_firmware_upgrade.py

The first time it runs, it may prompt that the device is not registered.If it is a legal device, just wait a few seconds and try again.

  • UPS Pro Will be turned off after upgrading, Please unplug the power supply, remove the batteries from UPS Pro.
  • Insert the batteries back to UPS Pro and then connect power supply and turn it on by press power switch.

Method 2

  • Open a terminal and typing:
i2cset -y 1 0x17 50 127 b
  • Shutdown Raspberry Pi and remove all batteries and power supply.
  • Insert batteries back into the battery slot.
  • Execute OTA.py python script.
  • UPS Pro Will be turned off after upgrading, Please unplug the power supply, remove the batteries from UPS Pro.
  • Insert the batteries back to UPS Pro and then connect power supply and turn it on by press power switch.

How To Enable Auto-Shutdown Protection Function

How To Collect Data

  • Data Collection

Data collection will only collect information on abnormal voltage changes and battery charging and discharging status during equipment operation through UPS in order to provide better after-sales service, and will not collect your private information.
Please rest assured that every UPS we sell will Have a unique serial number so that we can provide battery quality analysis and feedback.
It submits your UPS Pro operating status information to the server provided by us through a python script.

  • Download Repository and execute:
cd ~
curl -Lso- https://git.io/JLygb

When encountering low battery, it will automatically shut down and turn off the UPS and it will restart when AC power comes.

How To Setup RTC

Using Overlays

  • Overlays are loaded using the "dtoverlay" config.txt setting.

As an example,consider I2C Real Time Clock drivers. In the pre-DT world these would be loaded by writing a magic string comprising a device identifier and an I2C address to a special file in /sys/class/i2c-adapter, having first loaded the driver for the I2C interface and the RTC device - something like this: PS: sudo su means use root user to operate the system file, otherwise you may encount an error: "Permission denied"

    sudo modprobe i2c-bcm2835
    sudo modprobe rtc-ds1307
    sudo su 
    echo ds1307 0x68 > /sys/class/i2c-adapter/i2c-1/new_device

With DT enabled, this becomes a line in config.txt:
Edit /boot/config.txt file via vim.tiny tool or nano in a terminal: sudo vim.tiny /boot/config.txt
And then add this parameter:

    dtoverlay=i2c-rtc,ds1307

This causes the file /boot/overlays/i2c-rtc.dtbo to be loaded and a "node" describing the DS1307 I2C device to be added to the Device Tree for the Pi. By default it usees address 0x68, but this can be modified with an additional DT parameter:

    dtoverlay=i2c-rtc,ds1307,addr=0x68

Parameters usually have default values, although certain parameters are mandatory. See the list of overlays below for a description of the parameters and their defaults.

For Raspberry Pi 4B

Here we assume that you have already burned the Raspbian Image into TF card and connect to your PC and logged in. Open a terminal and modify /boot/config.txt file using what you favorate editor such as vim.tiny or nano, add parameters as following picture:

DS1307-4B(1).png


You can read /boot/overlay/README and find this info to add support for ds1307 I2C Real Time Clock device.

DS1307-4B(2).png


please ensure that /boot/config.txt file include two paramaters:

dtoverlay=i2c-rtc,ds1307 
dtparam=i2c_arm=on

After that, please make sure you have disabled the "fake hwclock" which interferes with the 'real' hwclock

sudo apt-get -y remove fake-hwclock
sudo update-rc.d -f fake-hwclock remove

Now with the fake-hw clock off, you can start the original 'hardware clock' script.
Edit the script file /lib/udev/hwclock-set with nano or vim editor and comment out these three lines:

if [ -e /run/systemd/system ] ; then
 exit 0
fi

Finally result like this:

DS1307-4B(6).png


save and reboot your RPi.


For Raspberry Pi 3B

Here we assume that you have already burned the Raspbian Image into TF card and connect to your PC and logged in. Open a terminal and modify /boot/config.txt file using what you favorate editor such as vim.tiny or nano, add parameters as following picture:

Ds13076.png


You can read /boot/overlay/README and find this info to add support for ds1307 I2C Real Time Clock device.

Name:   i2c-rtc
Info:   Adds support for a number of I2C Real Time Clock devices
Load:   dtoverlay=i2c-rtc,<param>=<val>
Params: ds1307                  Select the DS1307 device

please ensure that /boot/config.txt file include those three paramaters:

device_tree=bcm2710-rpi-3-b.dtb
dtoverlay=i2c-rtc,ds1307
dtparam=i2c_arm=on

After that, please make sure you have disabled the "fake hwclock" which interferes with the 'real' hwclock

sudo apt-get -y remove fake-hwclock
sudo update-rc.d -f fake-hwclock remove

Now with the fake-hw clock off, you can start the original 'hardware clock' script.
Edit the script file /lib/udev/hwclock-set with nano or vim editor and comment out these three lines:

if [ -e /run/systemd/system ] ; then
 exit 0
fi

Finally result like this:

Raspberry pi hwclock-set.png


save and reboot your RPi.

How To Estimate Battery Power

How To Adjust The Sampling Period

  • If you want to change the sampling interval, you can change it with the following demo code in python:

NOTE: Change the number of `SAMPLE_TIME` will adjust the sampling period: range from 2 to 60, unit minute.

  • Demo code:
import smbus

DEVICE_BUS = 1
DEVICE_ADDR = 0x17
SAMPLE_TIME = 2  

bus = smbus.SMBus(DEVICE_BUS)

aReceiveBuf = []
aReceiveBuf.append(0x00)  

bus.write_byte_data(DEVICE_ADDR, 21,SAMPLE_TIME & 0xFF)
bus.write_byte_data(DEVICE_ADDR, 22,(SAMPLE_TIME >> 8)& 0xFF)

print("Setting Sampling Period to: %d Min" % SAMPLE_TIME)
  • Save it to a file and execute it:
python3 ups_change_sample_period.py

Package Includes

  • 1 x UPS Plus For Raspberry Pi
  • 4 x M2.5 copper pillar
  • 4 x M2.5 screws
  • 4 x M2.5 long copper stick
  • 4 x M2.5 nuts
  • 1 x Acrylic shield
  • 1 x Instructions
UPS V2 9.jpg


FAQ

  • Q: Why does the battery light go off sometime and lights up in a while?
    • A: This is because the power chip performs battery re-sampling, and the purpose is that the data of inferior batteries is inaccurate during the sampling process.
  • Q: Why is the power cut off every once in a while?
    • A: Please check the battery charging current, the data discharge direction or the charging direction. If the load is too large, the charging may not be enough, which will cause this problem.
  • Q: What kind of wall charger should I use?
    • A: If the load is normal, it is recommended to use an ordinary 5V@2A charging head. If you need to carry a slightly higher load, it is recommended to use a fast charging source. We support FCP, AFC, SFCP protocols Fast charging source.
  • Q: Can I directly input 9V and 12V to the USB port?
    • A: No, if you must do this, you must remove the DP, DM and other related detection pins, and ensure that the power supply is stable.
  • Q: I heard howling, why is this?
    • A: Because of the no-load protection mechanism, the howling will disappear after the load is installed.

Keywords

  • UPS Plus, GeeekPi UPS V5, UPS for Raspberry Pi