How to read the battery capacity via I2C on X750&725

This is the guide of how to read the battery capacity via I2C on X750&725:

We test it base Raspbian Stretch system.

1. Enable I2C function on the Raspbian

sudo raspi-config

Select '5 Interfacing Options' and then 'I2C - Enable/Disable automatic loading'. A prompt will appear asking 'Would you like the ARM I2C interface to be enabled?', select "Yes"

2. Once you have logged into your Raspberry Pi from the command line, run the following command to install i2c-tools

sudo apt-get install python-smbus
sudo apt-get install i2c-tools

3. Download the required script

git clone https://github.com/geekworm-com/x750.git
cd x750
chmod +x x750.sh

4. Install the script

sudo bash x750.sh

5. Setting up the command to turn off X750 from software

printf "%s\n" "alias x750off='sudo x750shutdown.sh'" >> ~/.bashrc

6. Reboot the Raspberry Pi

sudo reboot

7. Powering off the Raspberry Pi from software

x750off

8. Reading battery voltage and percentage

sudo python x750ups.py

Customers often ask if we support automatic and safe shutdown at low battery capacity? Our suggestion is: You can refer to the A file and the B file to program this idea yourself: The idea is to read the current voltage or battery capacity cyclically, and then judge the program to execute the automatic shutdown command when it is low or low voltage, of course This low battery or low voltage value is an empirical value, and you can specify it yourself in the program.

Add your comment

Geekworm Wiki welcomes all comments. If you do not want to be anonymous, register or log in. It is free.

Sort by date Sort by score

Enable comment auto-refresher

You are ignoring the author of this comment

Show comment | Manage ignore list

Anonymous user #7

54 months ago

Score 0

Any discription on the ph2.0 4-pin external power switch?

I want to connect to an external switch, but do not know the pin out.

Thanks.

Permalink | Reply

You are ignoring the author of this comment

Show comment | Manage ignore list

Anonymous user #6

55 months ago

Score 0

What is the micro USB on the end of the board for? Is that for the Wake on Lan and second ethernet functionality?

Permalink | Reply

You are ignoring the author of this comment

Show comment | Manage ignore list

Cindy

55 months ago

Score 0

Hi friend,

Do you mean X750? Please refer to .

Permalink

You are ignoring the author of this comment

Show comment | Manage ignore list

Anonymous user #5

58 months ago

Score 0

I got this error while executing the script on my x725:

IOError: [Errno 121] Remote I/O error

am i the only one ?

Permalink | Reply

You are ignoring the author of this comment

Show comment | Manage ignore list

Anonymous user #4

60 months ago

Score 0

sed -e "s/\r//g" file > newfile

Permalink | Reply

You are ignoring the author of this comment

Show comment | Manage ignore list

Anonymous user #1

60 months ago

Score 0

See Anonymous User #2's comment. That was the problem. When the extra character is stripped from the lines, the script executes as advertised and the two functions, software shutdown and print battery capacity work.

Many thanks.

Permalink | Reply

You are ignoring the author of this comment

Show comment | Manage ignore list

Anonymous user #3

60 months ago

Score 0

Anyone have problem with : ./x720pwr.sh: linia 6: echo: błąd zapisu: Urządzenie lub zasoby zajęte ./x720pwr.sh: linia 7: /sys/class/gpio/gpio4/direction: Nie ma takiego pliku ani katalogu ./x720pwr.sh: linia 9: echo: błąd zapisu: Urządzenie lub zasoby zajęte X720 Shutting down... cat: /sys/class/gpio/gpio4/value: Nie ma takiego pliku ani katalogu ./x720pwr.sh: linia 17: [: =: oczekiwano operatora jednoargumentowego

./x720pwr.sh: linia 21: [: =: oczekiwano operatora jednoargumentowego

Permalink | Reply

You are ignoring the author of this comment

Show comment | Manage ignore list

Anonymous user #1

60 months ago

Score 0

Has anyone else tried this with a Raspberry Pi 4? When I tried to install the script (sudo bash X750.sh) bash threw errors:

xxxx@Z97A-i64:~$ sudo bash x750.sh [sudo] password for xxxx: x750.sh: line 3: $'\r': command not found

No such file or directoryal

x750.sh: line 5: $'\r': command not found

No such file or directory

x750.sh: line 44: $'\r': command not found x750.sh: line 45: $'\r': command not found x750.sh: line 48: $'\r': command not found

No such file or directoryal

x750.sh: line 50: $'\r': command not found x750.sh: line 73: $'\r': command not found x750.sh: line 76: $'\r': command not found

No such file or directoryal

x750.sh: line 78: $'\r': command not found

No such file or directory/x750ups.py

chmod: cannot access ‘/home/pi/x750ups.py\r’: No such file or directory x750.sh: line 125: $'\r': command not found

For what it is worth, I ran as "pi" on the RP-4 and again on an Ubuntu linux system. Both gave the same errors.

Suggestions?

Permalink | Reply

You are ignoring the author of this comment

Show comment | Manage ignore list

Anonymous user #2

60 months ago

Score 0

For some reason the x750.sh script has been saved with DOS/Windows encoding, so there are extra \r (^M) characters at the end of each line. Open the script in editor like kwrite and save using Unix line convention (\n only).

Permalink