https://github.com/pbrunot/owonb41t

Javascript interface for digital multimeter OWON B41T+
https://github.com/pbrunot/owonb41t

Last synced: about 1 month ago
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Javascript interface for digital multimeter OWON B41T+

• Host: GitHub
• URL: https://github.com/pbrunot/owonb41t
• Owner: PBrunot
• License: mit
• Created: 2021-04-10T21:11:08.000Z (almost 4 years ago)
• Default Branch: main
• Last Pushed: 2023-10-21T07:02:36.000Z (about 1 year ago)
• Last Synced: 2024-11-08T03:40:14.572Z (2 months ago)
• Language: JavaScript
• Size: 789 KB
• Stars: 7
• Watchers: 2
• Forks: 1
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# Owon B41t web interface

Javascript interface for digital multimeter OWON B41T+

Test it here in your browser: [Github webpage](https://pbrunot.github.io/owonb41t/multimeter.html) 

![image](https://github.com/PBrunot/owonb41t/assets/6236243/b0cb0a81-5eff-47bf-b08c-5f332fa6a527)

# Requirements

- It requires a modern browser with Javascript Bluetooth enabled (tested with Chrome and Edge)

- Bluetooth BLE 4.0+ hardware interface

- Check bluetooth first with Chrome browser: chrome://bluetooth-internals

I tested with TP-Link UB400 adapted module on Desktop Windows 10.

# Owon meters protocol

B41T+ follows B35 protocol, which is described here : https://github.com/DeanCording/owonb35

Basically every BT notification contains 3 int16:

- one identifying the active measure, the number of decimals, and the units

- one identifying the measure type (hold/auto/max/min...) * this one is not parsed at the moment *

- one containing the displays digits with most significant bit used as sign bit 

# Bluetooth with Javascript

Reference document : [Web Bluetooth](https://googlechrome.github.io/samples/web-bluetooth/index.html)