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lanrat.github.io/usb-meter

Information

This webapp makes use of WebBluetooth to read data from the cheap Atorch power meters. Any web browser with WebBluetooth support should work, including Chrome based browsers on desktop and Android.

Screenshots

screenshot

Hardware

image

This should work with most of the power meters made by Atorch. It has only been tested with the USB version, but the others should work too. (pull requests welcome).

This should work with any hardware that is supported by the E-test app.

The specific model used for development was the Atorch J7-C, purchased here.

DC meter / electronic loads

It was additionaly tested for DL24 electronic load which works in DC meter mode when using ATorch protocol (the one used by E-test app). It is limited compared to USB meter mode. There are possibilities to get more data out of the meter using PX100 protocol.

Main issues with DC meter mode:

  • capacity meter has resolution of 10 mAh, which means that least significant digit of measurement is always 0
  • energy meter is not available
  • USB Data -/+ field is listed but unavailable

Building

To build yourself:

npm install
npm run build

References