itpnyu / p5.ble.js Goto Github PK

Calling for .read() or .startNotifications() using 'float64' as the data type causes a sketch to fail.

Sample:

myBLE.startNotifications(characteristic, myHandler, 'float64');

error:

crashes on line 40 of p5.ble.js

Trying to use the examples in the p5 web editor I constantly get an error:

Error: SecurityError: requestDevice() called from cross-origin iframe.

the examples code work fine if I run them locally.

Multiple services

Hi,
I like this project, but I can't find a way to get values from characteristics in different services. Did I miss something?
best regards and thank you for the work

On this page of the docs, please update this:

<script src="https://unpkg.com/[email protected]/dist/p5.ble.js" type="text/javascript"></script>

To this:

<script src="https://unpkg.com/[email protected]/dist/p5.ble.js" type="text/javascript"></script>

Or to the current version. It causes problems for float32 data and bigEndian data.

I am working with Health Thermometer Service (UUID: 0x1809) I have enabled read and notify properties of the Temperature Measurement characteristic (UUID: 0x2A1C) which sends 5 byte data in SFLOAT format. I am using .read() api but the size of given datatype parameter is not enough to read the complete value.

I have tried using uint32 which shows 1 byte less. I have tried using float64 but the read value is always zero. Can you please suggest work around how to read the complete temperature data? Basically what I want to know is how to read large characteristics (say 100 byte long).

Hi, I'm wondering if you could provide a function to write a string to a characteristic? On line 104 you use the Uint8Array.of() function to parse the input value, in that case we can't write a string to a characteristic. Perhaps it can be changed to something like:

const bufferToSend = new Uint8Array(toUTF8Array(inputValue));

so we can send value to the device? If it's a design choice, could you please let me know the reason for this? Thank you!

Hi there. Love this library!!
Just trying to get it to work with ESP32. No luck connecting to advertised service UUID.

On my phone using the BLE Scanner app, I can see and connect to my service. But don't see the service listed from browser using myBLE.connect(serviceUuid, gotCharacteristics). Just hangs and says "no compatible devices found."

The code for ESP32 is quite different from your sample code for Arduino, but at the end of the day, it advertises a serviceUUID and that's confirmed working... so don't think there's too much to go wrong.

Bug? Or am I doing something wrong? Does it need something else in that ArduinoBLE.h library? (I'm not using that library). I'm using:
#include <BLEDevice.h>
#include <BLEUtils.h>
#include <BLEServer.h>

Hi there,

I'm trying to run the multiple characteristics example, but receiving an error in the browser console. The device I'm trying to connect to is an ESP32 running a BLE test code that has 1 service and 2 characteristics. The ESP32 is able to be connected to through other BLE apps. The example has been modified with the device's service and characteristic UUIDs.

Here is the output from the browser console:

p5.ble.js:51 Requesting Bluetooth Device...

p5.ble.js:53 Uncaught TypeError: Cannot read property 'requestDevice' of undefined
    at p5ble.connect (p5.ble.js:53)
    at connectAndStartNotify (sketch.js:37)
    at p5.Element.eventPrependedFxn (p5.js:49425)

Would you happen to know what's the cause, or if there's any way to fix this?

Thanks!

Thanks for the library!
I am using version 0.0.6. (Have also tried 0.0.4 and 0.0.5)
Creating an options object and using it directly instead of a serviceUuid is not working.

Any attempt at using an options object give the following errors:

Please pass in a serviceUuid string or option object, e.g. options = { filters: [{ services: [serviceUuid] }]} 
Requesting Bluetooth Device... 
Error: TypeError: Failed to execute 'requestDevice' on 'Bluetooth': Either 'filters' should be present or 'acceptAllDevices' should be true, but not both.
characteristics:  
undefined
There is no device connected.

The options objects I am trying to use have been tested using the Chrome demo page:
https://googlechrome.github.io/samples/web-bluetooth/device-info.html
For example, the following filter works just fine to scan all the BBC micro:bits in the vicinity using the Chrome demo code but does not work with P5Ble (same error as above):
options = {filters:[{namePrefix:"BBC"}]}
Also options = {acceptAllDevices: true} works fine on the Chrome demo page.

I got this wonderful library working with the new Arduino Nano 33 BLE. However sending float values seems to have an issue. For example these are the float values as reported in my serial montior and the corresponding float values received by p5.ble.js

I am using the ArduinoBLE library. And sending float values using BLEFloatCharacteristic and receiving them in p5.ble.js using myBLE.read(myCharacteristic, 'float32', gotValue);

Hello, thanks a lot for creating this library. It's really good and it's been working great. I'm using it with nRF52840 feather express board and UART service to communicate. I'm working on a web-app, which needs to function on iOS; however, chrome nor safari supports the Bluetooth APIs. I installed WebBle, Bluefly and other browsers that do support the Bluetooth APIs. On those browsers, I can successfully connect to the Bluetooth device, but I never receive the data. It appears that the event 'characteristicvaluechanged' might not be getting fired. I do see this log in the console printed.

console.log('> Notifications started');

Below is the code that I have. Any pointers or help will be useful.
Warmly,
Amay

  // Read UART characteristics. 
  handleCharacteristics(error, characteristics) {
      if (error) {
          console.log('error: ', error);
          return; 
      }

      this.myTxCharacteristic = characteristics[0]; 
      this.myRxCharacteristic = characteristics[1];

      this.myBLE.startNotifications(this.myRxCharacteristic, this.handleIncomingData.bind(this), 'string');

      this.isReceivingData = true; 
      console.log("BLE: Successfully paired. Ready to communicate.")
  }

Hi all. I'm trying to send notifications in the draw function but I keep receiving "NetworkError: GATT operation already in progress". If I lower down the framerate the issue will be solved. I believe it is because the p5 sketch is sending notifications too fast and the BLE has a delay. I am wondering if that is possible to have a boolean function that detects whetehr there is anything busy or in the queue. Many thanks!

I noticed that the "Start Stop Notifications example" with Arduino 101 doesn't work. it threw out the following error.

I also tested the Notification example with Web BLE(on macOS) on Arduino 101, it also doesn't work, the error is: GATT Error, not supported:

This example was working fine a few months ago, I wonder what changed. I also found this discussion in the google group: https://groups.google.com/a/chromium.org/forum/#!topic/web-bluetooth/TlHnA3hTksw.

Maybe it's still working fine on other devices? @tigoe and @ZhuJingwen

Great library, but been trying to get a reconnect project working. Occasionally, my device will disconnect, so I'd like it to just reconnect as soon as possible. On the Chrome BLE sample projects, they do have an example, and that does work... only problem is that the service and characteristics need to be retrieved again? And how can you do this without relaunching the scanner window?
https://googlechrome.github.io/samples/web-bluetooth/automatic-reconnect.html

So upon a successful reconnect, I tried to start notifications on a characteristic, but get an error:
p5.ble.js:11166 Uncaught (in promise) DOMException: Characteristic with UUID c97f391f-a6c4-4778-afac-05f797bbdc5f is no longer valid. Remember to retrieve the characteristic again after reconnecting.

Any ideas how this can work? Thanks!