1.8 KiB
these Linux programs read out the measurements from the WEB/WITRN/GZUt/QWay U2/U2p USB power meter.
go to wiki for more information about the device and protocols.
USB
u2_usb reads the measurements using the USB HID interface.
to compile the source code you require: gcc, make, hidapi library (libhidapi-dev).
then just run make and it will output the u2_usb binary.
run u2_usb to get the output in CSV format.
run u2_usb -d to get the raw and decoded output (useful for reversing and debugging).
if you get the message "could not open WEB-U2 (make sure it is connected and you have access rights)", then provide access rights to this USB device the following way:
sudo cp 99-web-u2.rules /etc/udev/rules.d/
sudo udevadm control --reload-rules
sudo udevadm trigger
and re-plug the device.
additionally u2_bt can send the voltage/current measurements to an InfluxDB time series database over UDP.
provide the InfluxDB hostname/IP and UDP port as arguments.
Bluetooth
to compile the source code you require: gcc, make, dbus library (libdbus-1-dev).
then just run make and it will output the u2_bt binary.
ensure the BlueZ Bluetooth stack is running:
sudo systemctl start bluetooth
don't forget to grant the permissions to access bluetooth devices:
sudo adduser $USER bluetooth
run u2_bt to get the output in CSV format.
run u2_bt -d to get the raw and decoded output (useful for reversing and debugging).
I did not implement the possibility to specify the Bluetooth adapter and device. the program uses the first Bluetooth adapter it finds, and first device with the name starting with Qway_U2.
additionally u2_bt can send the energy measurements to an InfluxDB time series database over UDP.
provide the InfluxDB hostname/IP and UDP port as arguments.