Read data from nRF51 to MATLAB

RE: Read data from nRF51 to MATLAB

BCI — Thu, 16 Nov 2017 10:42:33 GMT

Hello,

I think you can help me. I can't manage to read data from nRF51 DK to Matlab using an nRF51 dongle. In my case, I have stored data in PCA10028, I can open the serial port corresponding to the nRF51 dongle in Matlab. I can also visualize packets on nRF Connect.

Do I need special functions for reading and writing data in Matlab? Now, I am coding : obj = serial('COM12'); fopen(obj); a=get(obj); record(obj,'on'); UUID = ['2A','00']; dec=hex2dec(UUID); fwrite(obj,char(dec)'); [R,count] = fread(obj);

and always have in return : Warning: Unsuccessful read: The specified amount of data was not returned within the Timeout period..

ans =

1×0 empty double row vector

Thank you in advance,

BCI

RE: Read data from nRF51 to MATLAB

Revo — Thu, 07 Apr 2016 17:44:58 GMT

Perfect thank you, and so how can i receive in Matlab directly the decimal (or float for future application) value? Shall i do some conversion to the data received by the DK board before sending it to the COM port or convert it later on Matlab?

RE: Read data from nRF51 to MATLAB

RK — Thu, 07 Apr 2016 15:12:57 GMT

53 10 in hex is 0x45 0x0a. 0x45 is the digit '5' in ASCII and 0x0a linefeed, or an end of line. 54 is 0x46, or the digit '6' and I think you can work out the rest.

You're receiving ASCII strings, with linefeeds at the end of each character.