BLE.StringReceive

[404 Not Found]

I tried to send word "popo" to microcontroller by my application through BLE.It was worked but i could only receive letter 'p' insted the whole word.Could it possible that my application actually received the whole word but show just letter 'p'.

[ABG]

Those parentheses around the 'p' suggest that a list is being converted to a string on the AI2 side.

What do the Ai2 tool tips say about what is expected to go into the Values socket where you transmit 'popo' ?

The name Values is plural, suggesting it wants a list.

Does it expect a list?

What happens if you instead supply

 make a list('popo') for Values ?

ABG

[gerrikoio]

would need to see your Arduino code in particular how you read and write BLE strings

[Chris Ward]

Hi

We do not know how your Arduino is sending the data, post your Sketch here........

.......but before you do, in the App Inventor Blocks, try register for strings instead of read strings.

[Chris Ward]

...forgot to say, we really need to see all of the BLE related Blocks to understand your App code. Use this method to post an image of your Blocks:

https://www.professorcad.co.uk/appinventortips#TipsBlocks  How to create an image of your Blocks and add it to your Forum Post

[404 Not Found]

Thanks,This is my code.

[Chris Ward]

Right..... 

Serial.write(Serial.read());

I think it is possible that the write is performed before the read is completed. In any case, the code is reading one byte only.

Try something like this:

String sgRead;

void setup() {

       Serial.begin(9600);   //Set the baud rate of the bluetooth connection

}

void loop() {

       if(Serial.available() > 0)

       {

               //Data from App

               sgRead = Serial.readString();

               //Tiny delay

               delay(100);

               

               //Data to App

               Serial.print(sgRead);

               Serial.println();

               

               //Short delay between each data send/receive.

               //If data is sent in less than every 4-5 seconds, humans can't read it.

               delay(5000);

       }

}

[404 Not Found]

Thank you so much for every answers.Finally,i can solve the problem by used block BLE.register.string.