I want to add few condition for data received via RX pin

[Saffiq]

Hi.. I am still new in using nrf product and understanding the example given via SDK.  For my project, I am trying to send continous data via BLE app UART to mobile phone. That data will be produced from my sensor which is BMD101 and connected to RX pin of nRF52832 board. My problem is that sensor data received is a continuous data, so I am trying to separate the data to a smaller packet so that the data that will be stored in the buffer will not full.

This is the example of the data that i will received from my sensor = "AAAA048002009EDFAAAA048002009EDGAAAA048002009EDFAAAA048002009EDG........"

So i am trying to make a condition like this :

 if(raw==0xAA){   //170 
         while (!mySerial.available()) {}          
         raw = mySerial.read();

   if(raw==0xAA){    //170
        while (!mySerial.available()) {}
        raw = mySerial.read();
        //DATA=4
   if(raw==0x04){  
        while (!mySerial.available()) {}
        raw = mySerial.read();
        //DATA=80
        
        while (!mySerial.available()) {}
        raw = mySerial.read();
        //DATA=2
        
        while (!mySerial.available()) {}
        raw = mySerial.read();
        data[0]=raw;
        
        while (!mySerial.available()) {}
        raw = mySerial.read();
        data[1]=raw;

        while (!mySerial.available()) {}
        check = mySerial.read();
  
    checksum= data[0]+data[1]+0x82;
    checksum &= 0xFF;
    checksum = ~checksum & 0xFF; 


    
raw = data[0]*256 + data[1];
    if (raw >= 32768){
        raw= raw - 65536;
     
    }
        if (checksum==check){
           //Serial.println(raw,DEC);//send to USB
           sensorDataVariable= raw;
           Serial.println(sensorDataVariable);
           delay(800);
    }
     

I am still new in using Keil and C, therefore i do not know where to put this coding. Hope that you can guide me in understanding the coding and which section i need to change to make this kind of condition. Thank you 

SDK used: 14.2

Board :nrf52832

Sensor : BMD101

Mobile phone :Huawei Nova 2i (nougot)

[Kenneth]

It sounds to me what you want to do pretty much the same as the ble app uart example in the SDK:

\nRF5_SDK_15.0.0_a53641a\examples\ble_peripheral\ble_app_uart 

Documentation:

http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.sdk5.v15.0.0/ble_sdk_app_nus_eval.html?cp=4_0_0_4_1_2_24 

The example will split the incomming UART data into 20bytes packets and send over BLE for handling.

 

[Saffiq]

Hi Kenneth .. thank you for your reply, I have tried SDK v15 , however my problem is still the same so can i know where i need to change if i would like to try to increase 20 bytes to maybe 50bytes

[Kenneth]

By default 20byte is maximum, but the peripheral and central can request to increase the MTU size (both on attribute and link layer). Typically if you look at the throughput example in the SDK or search for data length update you should find some guidelines on how to increase the MTU size.