Hello,
I'm working on nrF52832 with two different Android device : Samsung Galaxy note 3 neo and HTC ONE M8.
My test :
- Central side ( smartphone ) : each 200 ms I send 20 Bytes during 20s -> 100 * 20 Bytes
- Peripheral side : I measure the time between the first packet and the last one.
The result :
- HTC ONE M8 : 20.2 s to receive data
- SAMSUNG = 43 s to receive data
We are trying to improve the data transmission because the rate is too slow on some smartphone ( ex : samsung note 3 neo ).
I think that the connection interval on ble_evt_connected return 39 -> 48,5ms ( for both smartphone )
#define MIN_CONN_INTERVAL MSEC_TO_UNITS(10, UNIT_1_25_MS) /**< Minimum acceptable connection interval (0.1 seconds). */
#define MAX_CONN_INTERVAL MSEC_TO_UNITS(200, UNIT_1_25_MS) /**< Maximum acceptable connection interval (0.2 second). 200*/
#define SLAVE_LATENCY 0 /**< Slave latency. */
#define CONN_SUP_TIMEOUT MSEC_TO_UNITS(4000, UNIT_10_MS) /**< Connection supervisory timeout (4 seconds). */
How can I increase the speed ?
Thank you very much.
Nabil
