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Web Developer with BLE
Posted: Thu Feb 19, 2026 10:25 am
by stefan.erni
Hi Steve
ESP32 BLE and App Developer work very well together.
Already done in the forum.
viewtopic.php?t=3468
One more small request:
It doesn't work with the Web Developer yet.
Would it be possible to add this as a feature?
Re: Web Developer with BLE
Posted: Thu Feb 19, 2026 10:46 am
by Steve-Matrix
I have made a Web Developer component, but it is currently unreleased and needs a little more work. I'll look into it again and see if we can get something out soon.
Re: Web Developer with BLE
Posted: Thu Feb 19, 2026 12:37 pm
by Steve-Matrix
BTW, a beta version of the BLE Web Developer component was posted by Ben here:
viewtopic.php?p=22575#p22575
Have you managed to tried it? This might actually work as-is. But if it doesn't, it would be useful to know.
Re: Web Developer with BLE
Posted: Thu Feb 19, 2026 2:13 pm
by stefan.erni
Hi Steve
I copied the components.
I've already tried that program,
but I can't select which BLE I want to connect .
Is that the component?
Re: Web Developer with BLE
Posted: Thu Feb 19, 2026 2:44 pm
by Steve-Matrix
Yes, that's the component. But a slightly newer version is attached here (this one has a proper icon).
The complication is the "filter" expression. Due to domain origin issues in (most?) browsers, this needs to reference the actual device being connected to. There are examples in the tooltip for that property that show what is required. Here are 4 examples:
Code: Select all
filters: [ { services: [0x1802, 0x1803] } ]
filters: [ { name: "My Cool Device" } ]
filters: [ { namePrefix: "Mtx" } ]
filters: [ { services: ["heart_rate"] } ], optionalServices: ["battery_service"]
You would also need to enter the appropriate Service and Characteristic too.
The component only supports strings currently.
Re: Web Developer with BLE
Posted: Thu Feb 19, 2026 3:23 pm
by stefan.erni
ok I can see component and the filter now
I have an ESP32 sending a string all second.
I can receive the string in my Iphone.
Is filter like this?
name of device:
- 2026-02-19_16-18-13.PNG (14.26 KiB) Viewed 84 times
Filter?
- 2026-02-19_16-19-07.PNG (22.65 KiB) Viewed 84 times
Re: Web Developer with BLE
Posted: Thu Feb 19, 2026 5:06 pm
by Steve-Matrix
I think that filter should work. The Service and Characteristic values needs to be correct for your ESP32 device.
If you call "RequestDevice", the browser should ask to connect to your device. Once connected, the "OnValueChanged" macro should be called when the data for that Characteristic has been changed.
Re: Web Developer with BLE
Posted: Fri Feb 20, 2026 1:57 pm
by stefan.erni
Hi Steve
if I press the Button for "RequestDevice" nothing happens