https://devzone.nordicsemi.com/f/nordic-q-a/17876/what-should-i-do-if-i-were-to-write-a-struct-to-a-characteristics-in-androidIt appears that, if I wanted to write characteristics to my BLE device, I can utilize the writeCharacteristic method of the BluetoothGatt class. Is this the right way to go, were I to write a series of data, up to 21 bytes, at struct to be more exacten-USTelligent Community 13Tue, 22 Nov 2016 09:55:21 GMThttps://devzone.nordicsemi.com/thread/68908?ContentTypeID=1Tue, 22 Nov 2016 09:55:21 GMT137ad170-7792-4731-bb38-c0d22fbe4515:ef95a1cd-ee4f-44aa-8eba-0c3650d57dd1Hung Bui<p>Yes, you should use writeCharacteristic (). This command simply update the value of the characteristic you use in the argument to the correspondent characteristic on the server. And the value of the characteristic is in byte[], so basically what you send over BLE is an array of byte. BLE won&#39;t care if it&#39;s a struct data or anything else.</p><div style="clear:both;"></div>