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How to Use

Connect the cables as mentioned above and insert 3 AA NiMH 
rechargeable batteries**.

Power ON:

Press the button (labeled 4 in picture above) to power on the 
SmartUPS. Button must be pressed to send output power and I2C 
communication to Raspberry Pi anytime the LED flashes red, green, 
and blue upon startup.

Power OFF:

Hold and press the button for about 4 seconds. The LED will start 
blinking at about 1 second interval indicating power will be turned off 
soon. (It will blink for about 2 minutes before powering off the Pi).

Automatic startup and shutdown options can be configured. See 
Startup and Shutdown options below.

** Currently supported chemistry: NiMH

LED indications

Flashing

Meaning

Red, Green, and Blue SmartUPS is starting up and button must be pressed 

once to initialize I2C communication and send output 
power.

White occasional 
blink

Normal operation, battery is full.

Blue occasional blink Normal operation, battery is being charged.
Yellow occasional 
blink

Normal Operation, battery is being drained

.

Red fast blink

SmartUPS is in shutdown mode.

White blink on Power 
ON

When SmartUPS is powered off, it will blink once to 
acknowledge change in power state.

Green blink on Click

When SmartUPS button is clicked (single click or 
Double click), it will blink once to acknowledge.

Red occasional blink Battery internal resistance is high (battery is going 

bad).

Red fast blink

Battery is very bad, and won't last long for UPS.

Red steady light

FAULT (Battery is dead or missing, or thermistor 

Copyright © 2014  OpenElectrons.com

 2/7

Summary of Contents for SmartUPS

Page 1: ...labeled 2 in picture above 3 Data connection Connect I2C Access Point Board on GPIO pins of your Pi as shown in adjacent picture and connect the 4 pin colored wire from the i2c connector of that boar...

Page 2: ...indications Flashing Meaning Red Green and Blue SmartUPS is starting up and button must be pressed once to initialize I2C communication and send output power White occasional blink Normal operation b...

Page 3: ...m upspanel Hold for about 2 seconds LED starts blinking fast Green indicating shutdown approaching in 50 seconds at this point SmartUPS issues a shutdown command to Pi Hold longer about 6 seconds LED...

Page 4: ...e Raspberry Pi until the battery status reaches Critical Verbose The SmartUPS will display a message through command prompt every minute of the shutdown process Quiet The SmartUPS will not display mes...

Page 5: ...I2C Pin Layout The pins on the boards are as follows Pin with white square paint mark I2CAPB Ground 5V SCL SDA SmartU PS Ground SCL SDA I2C Bus address Factory Default Address 0x24 Changing the I2C B...

Page 6: ...Battery current 0x4A Battery voltage 0x4C Battery capacity 0x4E Estimated battery time 0x50 Battery temperature 0x51 Battery health 0x52 Output voltage 0x54 Output current 0x56 Battery maximum capaci...

Page 7: ...See Battery States section below for more information Battery Temperature Battery temperature in celcius Battery States Idle SmartUPS is figuring out the battery status Precharg SmartUPS is condition...

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