HARDKERNEL ODROID-UPS3 Manuel utilisateur

2023/06/13 00:38 1/10 Introduction

ODROID Wiki - https://wiki.odroid.com/

Introduction

The ODROID-UPS3 (Uninterrupted Power Supply) device is designed speciﬁcally for the ODROID-

C1,C1+ and ODROID-C2.

It is equipped with a rechargeable Lithium-Polymer Battery, Charger IC and 5Volt Boost DCDC.

When the AC power source is removed, the UPS3 keeps supplying the power to the ODROID boards

with the battery.

There is a digital output pin to send the battery low-level warning to the ODROID to trigger the

shutdown process.

It will signiﬁcantly reduce the risk of data loss by sudden power loss.

When the AC power source becomes available again, the UPS3 will supply power to the ODROID again

automatically.

Speciﬁcation

Power Input

Dc Input Voltage DC 4.8~ 5.4V

DC Input Current 2A Min.

Charger

Charging Time 1hour 30min ~ 2 hours

Battery Charging Current 2A Max.

Power Ouput

DC Output Current 2A Max.

DC Output Voltage 5 V

Battery Pack

Type Lithium-Polymer

Capacity 3000 mAh typical

Nominal Voltage 3.7 V

Last

update:

2018/01/29

17:08

accessory:power_supply_battery:odroid-ups3 https://wiki.odroid.com/accessory/power_supply_battery/odroid-ups3?rev=1517215085

https://wiki.odroid.com/ Printed on 2023/06/13 00:38

Battery Life 400 charge/discharge cycles @ 20℃±5℃

Integrated Protection PCB Overcharge/discharge Protection

ODROID-C2 Estimated Running Time with typical load of

500mA @ 5V about 3 hours when fully charged

Schematic: ODROID-UPS3 for C series

PCB Layout(DWG):ups3_board_rev0.1_mech.zip

PCB Pattern(PNG):ups3.zip

When the battery was fully charged(VBAT=4.2V), we performed the load test with UPS3.

Time to power-oﬀ at the Load

Current Time to power-oﬀ No Load Output voltage Output voltage at the Load VBAT

2A 25sec

4.97V

4.65V 4.14 V

1.8A 140s 4.69V 4.12 V

1.6A 450s 4.71 4.05V

1.4A 810s 4.73V 3.98V

1.2A 1470s 4.81V 3.95V

If your C2 takes 800mA and USB devices take 850mA, the UPS3 can supply the power to your system

around 3~4 minutes at least.

It seems to be ﬁne to shutdown the system safely.

LED Indicators

BLUE LED(D1)

Illuminated when power is connected and battery is charged

OFF when charger is idle:

Battery is fully charged1.

Power is not connected or shutdown2.

Rapidly blinking when power is connected but battery is not connected

Power Status Indicator & Control Pins

AC_OK output pin (pin#11 of J2) is high when the AC source is available.

BAT_OK output pin (pin#13 of J2) is high when the battery voltage is higher than 3.7V.

POWER_LATCH input pin (pin#15,26 of J1) must be high to supply 5V to the load.

2023/06/13 00:38 3/10 Introduction

ODROID Wiki - https://wiki.odroid.com/

How to conﬁgure HW

Set up switches

SW1 - Output on/oﬀ

The slide switch, SW1 is to control the 5V supply to the ODROID.

SW2 - Board select

UPS3 supports C1/C1+ and C2.

You need to select the model using the slide switch, SW2.

Ensure that slide switch SW1 is to the left to enable power output.

Even when SW1 is oﬀ, the charging function keeps working.

Assemble guide

Assemble as the UPS3 as shown in Figure.

Last

update:

2018/01/29

17:08

accessory:power_supply_battery:odroid-ups3 https://wiki.odroid.com/accessory/power_supply_battery/odroid-ups3?rev=1517215085

https://wiki.odroid.com/ Printed on 2023/06/13 00:38

Pin assignment to conﬁgure SW

There are three signals to control auto shutdown and wake-up based on battery status.

AC_OK : The AC_OK pin is high when the AC source is available.

BAT_OK : The BAT_OK pin is high when the battery voltage is higher than 3.7V.

POWER_LATCH : This pin must be high to supply 5V to the load.

AC_OK BAT_OK POWER_LATCH

Pin GPIO Pin GPIO Pin GPIO

C1/C1+ 11 88 13 116 15 115

C2 11 247 13 239 26 225

The BAT_OK and AC_OK signals are used to monitor the current AC and battery status

and turn oﬀ system based on the status.

You can ﬁnd setup examples with the signals for Ubuntu and Android in the following sections.

How to conﬁgure SW (1) - Ubuntu

On Ubuntu, a common scheduling utility, cron daemon can be used with a script

to monitor the AC and battery status and control system shutdown by controlling three signals of

UPS3.

Auto shutdown Script

This script checks the status of power and battery.

2023/06/13 00:38 5/10 Introduction

ODROID Wiki - https://wiki.odroid.com/

Save the following code as ups3.sh in home directory.

Note that this script can be used with U3 as well as C1/C1+/C2 without modiﬁcation.

Let's assume that ups3.sh is located in /home/odroid/ups3.sh.

#!/bin/sh

MODEL=$(cat /proc/cpuinfo | grep ^Hardware | awk -F " " '{print $3}')

SYSFS_GPIO_DIR="/sys/class/gpio"

retval=""

gpio_export()

{

[ -e "$SYSFS_GPIO_DIR/gpio$1" ] && return 0

echo $1 > "$SYSFS_GPIO_DIR/export"

}

gpio_getvalue()

{

echo in > "$SYSFS_GPIO_DIR/gpio$1/direction"

val=`cat "$SYSFS_GPIO_DIR/gpio$1/value"`

retval=$val

}

gpio_setvalue()

{

echo out > "$SYSFS_GPIO_DIR/gpio$1/direction"

echo $2 > "$SYSFS_GPIO_DIR/gpio$1/value"

}

if test $MODEL = "ODROIDC"

then

AC_OK_GPIO=88

BAT_OK_GPIO=116

LATCH_GPIO=115

gpio_export $LATCH_GPIO

gpio_setvalue $LATCH_GPIO 1

elif test $MODEL = "ODROID-C2"

then

AC_OK_GPIO=247

BAT_OK_GPIO=239

LATCH_GPIO=225

gpio_export $LATCH_GPIO

gpio_setvalue $LATCH_GPIO 1

else

AC_OK_GPIO=199

BAT_OK_GPIO=200

gpio_export $AC_OK_GPIO

gpio_export $BAT_OK_GPIO

Last

update:

2018/01/29

17:08

accessory:power_supply_battery:odroid-ups3 https://wiki.odroid.com/accessory/power_supply_battery/odroid-ups3?rev=1517215085

https://wiki.odroid.com/ Printed on 2023/06/13 00:38

gpio_getvalue $AC_OK_GPIO

if [ $retval -eq 1 ]

then

echo "DC Input Okay"

else

echo "Power is shutdown or AC Adaptor is disconnected"

gpio_getvalue $BAT_OK_GPIO

echo $retval

if [ $retval -eq 0 ]

then

echo "battery is lower than 3.7V"

/sbin/shutdown -P 1

else

echo "battery is good"

Give execute permission to everybody with following command.

target

$ sudo chmod a+x /home/odroid/ups3.sh

Cron setup

This can be set up by running crontab.

target

$ sudo crontab -e

This example script will run ups3.sh script every 2 minutes.

target

# m h dom mon dow command

*/2 * * * * /home/odroid/ups3.sh

To conﬁrm that cron works with ups3.sh, check the syslog.

target

$ tail -f /var/log/syslog

...

2023/06/13 00:38 7/10 Introduction

ODROID Wiki - https://wiki.odroid.com/

...

Jul 25 04:53:01 odroid64 CRON[1824]: (root) CMD (/home/odroid/ups3.sh)

Jul 25 04:53:01 odroid64 CRON[1823]: (CRON) info (No MTA installed,

discarding output)

...

Jul 25 04:55:01 odroid64 CRON[1960]: (root) CMD (/home/odroid/ups3.sh)

Jul 25 04:55:01 odroid64 CRON[1959]: (CRON) info (No MTA installed,

discarding output)

...

Depending on the particular Battery State of Charge (SOC), this script

can issue a reboot a few times based on the speciﬁc load.

This means that the battery voltage can go over the threshold level

very quickly when the load is oﬀ.

However, it will turn oﬀ the board after cycling the power a few times.

How to conﬁgure SW (2) - Android

Android packages that are released since the following version already include

UPS3-related implementations.

Please check your Android version ﬁrst.

ODROID-C2 - Android 5.1.1 V3.5

ODROID-C1+ - Android 4.4.4 V3.7

If you have an older version, follow the whole process of this manual.

If not so, you only need to block “disable” part of ups3 service in

/init.odroid2.board.rc or /init.odroid.board.rc.

Because of LiPo chemical characteristics, Battery Level can

go little high when the load is quit light.

So, you should add a delay after low battery alarm.

On Android, you need to register the monitoring script, ups3.sh in android init rc.

Auto shutdown Script

Here is an example script for Android and the default path is /system/bin/ups3.sh.

Last

update:

2018/01/29

17:08

accessory:power_supply_battery:odroid-ups3 https://wiki.odroid.com/accessory/power_supply_battery/odroid-ups3?rev=1517215085

https://wiki.odroid.com/ Printed on 2023/06/13 00:38

#!/bin/sh

SYSFS_GPIO_DIR="/sys/class/gpio"

retval=""

gpio_export()

{

[ -e "$SYSFS_GPIO_DIR/gpio$1" ] && return 0

echo $1 > "$SYSFS_GPIO_DIR/export"

echo $1

}

gpio_getvalue()

{

echo in > "$SYSFS_GPIO_DIR/gpio$1/direction"

val=`cat "$SYSFS_GPIO_DIR/gpio$1/value"`

retval=$val

}

gpio_setvalue()

{

echo out > "$SYSFS_GPIO_DIR/gpio$1/direction"

echo $2 > "$SYSFS_GPIO_DIR/gpio$1/value"

}

check()

{

gpio_export $AC_OK_GPIO

gpio_export $BAT_OK_GPIO

gpio_getvalue $AC_OK_GPIO

if [ $retval -eq 1 ]

then

echo "DC Input Okay"

lowVoltageCount=0

else

echo "Power is shutdown or AC Adaptor is disconnected"

gpio_getvalue $BAT_OK_GPIO

echo $retval

if [ $retval -eq 0 ]

then

echo "battery is low than 3.7V"

sleep 118

lowVoltageCount=$(( lowVoltageCount+1 ))

if [ $lowVoltageCount -gt 5 ]

then

echo "power off"

2023/06/13 00:38 9/10 Introduction

ODROID Wiki - https://wiki.odroid.com/

am start -a

android.intent.action.ACTION_REQUEST_SHUTDOWN --ez KEY_CONFIRM true --

activity-clear-task

else

echo "battery is good"

}

MODEL=`getprop ro.product.board`

echo $MODEL

if [ `echo $MODEL | grep -c "odroidc2"` -gt 0 ]

then

AC_OK_GPIO=247

BAT_OK_GPIO=239

LATCH_GPIO=225

gpio_export $LATCH_GPIO

gpio_setvalue $LATCH_GPIO 1

elif [ `echo $MODEL | grep -c "odroidc"` -gt 0 ]

then

AC_OK_GPIO=88

BAT_OK_GPIO=116

LATCH_GPIO=115

gpio_export $LATCH_GPIO

gpio_setvalue $LATCH_GPIO 1

else

AC_OK_GPIO=199

BAT_OK_GPIO=200

LATCH_GPIO=204

gpio_export $LATCH_GPIO

gpio_setvalue $LATCH_GPIO 1

lowVoltageCount=0

while true

check

sleep 2

done

To enable UPS service, add a service routine in the Android init rc.

For each model, the default path is diﬀerent.

C1/C1+ : /init.odroid.board.rc

C2 : /init.odroid2.board.rc

Last

update:

2018/01/29

17:08

accessory:power_supply_battery:odroid-ups3 https://wiki.odroid.com/accessory/power_supply_battery/odroid-ups3?rev=1517215085

https://wiki.odroid.com/ Printed on 2023/06/13 00:38

target

shell@odroidc2:/ $ su

root@odroidc2:/ # mount -o rw,remount /

[ 298.823337] EXT4-fs (mmcblk0p2): re-mounted. Opts: (null)

root@odroidc2:/ # vi /init.odroidc2.board.rc

service ups /system/bin/ups3.sh

class core

user root

group root

# disabled

oneshot

As aforementioned, ups3.sh and init routine are added by default since a speciﬁc Android version.

If you have the new version, only make sure to block disabled part of ups3 service in

/init.odroid2.board.rc or /init.odroid.board.rc.

Tip for servo or motor driving application

Reported by Ameridroid

Remove the voltage detector IC (Reference number is U3 on the UPS3 & UPS2 board schematics)

While developing a walking robot that uses the UPS2 with ODROID-C1, we found the UPS2 would shut

oﬀ while moving servos after only a few minutes. We were led to this modiﬁcation that WILL void your

UPS3 & UPS2 warranty, but will likely solve your issues.

Without this modiﬁcation, we would get less than a few minutes of runtime out of our walking

robot.

After the modiﬁcation, we could get over an hour.

ODROID FORUM

You can ﬁnd a nice video in the above link that explains how to mod the UPS2 board.

From:

https://wiki.odroid.com/ - ODROID Wiki

Permanent link:

https://wiki.odroid.com/accessory/power_supply_battery/odroid-ups3?rev=1517215085

Last update: 2018/01/29 17:08

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