RE: Sending 2-bytes value from Central to Peripheral

RichieJH — Wed, 06 Jul 2016 22:47:30 GMT

Mark the answer as accepted in that case.

RE: Sending 2-bytes value from Central to Peripheral

octopus — Wed, 06 Jul 2016 18:03:13 GMT

Thanks, now it works as expected

RE: Sending 2-bytes value from Central to Peripheral

RichieJH — Wed, 06 Jul 2016 15:29:34 GMT

You don't have to split the float up if you don't want to. You could send all four bytes of the float in one go. After all ble_nus_string_send() can send 20 bytes in one go. The way I would do it is bit masking so you cover up and isolate three bytes while putting one byte of the float into the array to send. So do this:

Set up your array to send uint8_t data_to_send_array[4] = { 0 }

Next get your float_value and do this:

data_to_send_array[0] = (float_value & 0xFF000000) >> 24;
data_to_send_array[1] = (float_value & 0x00FF0000) >> 16;
data_to_send_array[2] = (float_value & 0x0000FF00) >> 8;
data_to_send_array[3] = (float_value & 0x000000FF);

Then call ble_nus_string_send(&m_nus, data_to_send_array , 4) and you will be good.

Else if you want to split the bifurcate your float into separate values apply the same principle above to each byte size of the new values.