Hola buenas, estamos realizando un proyecto para el colegio de mi hija pero tengo problemas con el Bluetooth se vincula pero no se conecta, realizamos varias pruebas pero no tenemos ni idea que pasa el proyecto es un pez robot que mide la turbulencia del agua y la temperatura
Upload the code from the sketch of the robot fish, here, so we can compare data formats.
Be sure to use println() at the end of each message to send from the sending device, to signal end of message.
Only use print() in the middle of a message.
Be sure not to println() in the middle of a message, or you will break it into two short messages and mess up the item count after you split the message in AI2.
Do not rely on timing for this, which is unreliable.
In the AI2 Designer, set the Delimiter attribute of the BlueTooth Client component to 10 to recognize the End of Line character.
Also, return data is not immediately available after sending a request,
you have to start a Clock Timer repeating and watch for its arrival in the Clock Timer event. The repeat rate of the Clock Timer should be faster than the transmission rate in the sending device, to not flood the AI2 buffers.
In your Clock Timer, you should check
Is the BlueTooth Client still Connected?
Is Bytes Available > 0?
IF Bytes Available > 0 THEN
set message var to BT.ReceiveText(-1)
This takes advantage of a special case in the ReceiveText block:
ReceiveText(numberOfBytes)
Receive text from the connected Bluetooth device. If numberOfBytes is less than 0, read until a delimiter byte value is received.
If you are sending multiple data values per message separated by | or comma, have your message split into a local or global variable for inspection before trying to select list items from it. Test if (length of list(split list result) >= expected list length) before doing any select list item operations, to avoid taking a long walk on a short pier. This bulletproofing is necessary in case your sending device sneaks in some commentary messages with the data values.
Some people send temperature and humidity in separate messages with distinctive prefixes like "t:" (for temperature) and "h:" (for humidity).
(That's YAML format.)
The AI2 Charts component can recognize these and graph them. See Bluetooth Client Polling Rate - #12 by ABG
To receive YAML format messages, test if the incoming message contains ':' . If true, split it at ':' into a list variable, and find the prefix in item 1 and the value in item 2.
Here is a simple BlueTooth text receiver sample, for single value per line:
when Clock1 .Timer do1290×410 59.1 KB
when Screen1 .Initialize do814×182 22.9 KB
..
The error 515 means you are trying to send/receive before being connected.
The image you posted is not easy to read ( low resolution ), but if Clock1 is always enabled, tthe Clock1.Timer event causes this error ( it should be enabled only after connection )
Also reading 255 bytes blocks the program until all bytes are available
Ya pudimos gracias a ustedes conectar pero ahora no responde la app
Who programmed the robot fish?
We also need to see their code.
While you are at it, export and upload your Project .aia file.
Usa este tipo de conexion, la idea es que te salga la lista de conexiones disponibles y selecciones una, trata con este metodo a mi me dio redsultado, saludos
Ya pudimos conectar gracias a ustedes pero no responde la app
In cases where you don't trust the hardware and software, look in the Play Store for a Simple Bluetooth Terminal app and use that to send and receive data to the suspicious hardware.
Your project lacks teamwork.
Look closely at my icon to see what results from a lack of teamwork.
Ok muchas gracias
