How to input a byte array in nRF Master Control Panel for android

[mmm]

I have a ble device and want to write a byte array in nRF Master Control Panel. Firstly, it can be written. But i don't know ho w to input it. My byte array is [-128, -64, 00, 00,00,00,00,00]. I tried many times with different format and It always report a red exclamatory point after input. Anyone can tell me its right format? thanks very much.

[Susheel Nuguru]

The attribute values are sent as 8-bit hex. So -128 is not possible I think you need to write them in hex and separated by by a dash '-'

Example [-127, -64, 00, 00,00,00,00,00] is written as

81-C0-00-00-00-00-00-00

If you write this then the attribute will be written with value 0x0000000000000C81 (which is decimal 3201) and it is upto your application to properly declare it and interpret the value.

[Naven Suresh]

Hi,

What is the maximum size of Byte array that can be given in the nRF connect app