https://github.com/anfractuosity/usbmeter

Simple program for extracting data from UM25C bluetooth power meter and for generating real-time voltage, current and power graphs
https://github.com/anfractuosity/usbmeter

um24c um25c usb-meter

Last synced: 2 months ago
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Simple program for extracting data from UM25C bluetooth power meter and for generating real-time voltage, current and power graphs

• Host: GitHub
• URL: https://github.com/anfractuosity/usbmeter
• Owner: anfractuosity
• Created: 2018-08-26T09:07:29.000Z (over 6 years ago)
• Default Branch: master
• Last Pushed: 2021-06-08T19:26:05.000Z (over 3 years ago)
• Last Synced: 2024-05-21T06:28:14.197Z (8 months ago)
• Topics: um24c, um25c, usb-meter
• Language: Python
• Homepage:
• Size: 45.9 KB
• Stars: 13
• Watchers: 3
• Forks: 4
• Open Issues: 1
• Metadata Files:
  • Readme: README.md

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README

        
# usbmeter

Extracts and graphs data from UM25C etc. USB power meters in Linux.

Based on the excellent reverse engineering found here - https://sigrok.org/wiki/RDTech_UM24C.  

![graph](/images/graph.png)

# Install on arch

```

sudo pacman -S bluez

sudo pacman -S bluez-utils 

sudo pacman -S python-pybluez

pip3 install . --user

```

# Run on arch

Start the bluetooth service:

```

sudo systemctl start bluetooth

echo "power on" | bluetoothctl

```

It is then recommended to do the following, to view a live

graph of voltage, current and power:

```

usbmeter --addr 
 --graph

```


You can also run without the --addr parameter, for the device

to be detected automatically, however some people have told 

me that this gives 'No services found for address ....' for them.

# Save data

To save the power data to a file:

```

usbmeter --addr 
 --graph --out out.dat

```


To process this pickled data, you can do:

```

#!/usr/bin/python3

import pickle

objects = []

with open('out.dat', 'rb') as f:

    while True:

        try:

            objects.append(pickle.load(f))

        except EOFError:

            break

for x in objects:

    print("%s,%f,%f" % (x['time'],x['Volts'],x['Amps']))

```

# Licence

MIT