Hi,
WHAT I'VE FOUND: I've searched a lot about this, found a similar issue (http://e2e.ti.com/support/wireless_connectivity/f/538/t/349134) but it is for Windows through USB Dongle. I couldn't figure out the similar/same functions to adapt it to Arduino and BLE Mini (http://redbearlab.com/blemini/)
WHAT I CAN DO: I am getting RSSI and UUID from a peripheral device (Peripheral mode iPhone) through BLE Mini (Central Mode) I can get those data once in a 4-5 seconds.
WHAT I CAN'T DO: I cannot get those data 3-4 times in a second.
I WANT TO: be able to get those data 3-4 times in a second and be able to understand what scan interval and scan window is.
MY SETUP: I've installed 2540 HCI Firmware (HCI_UART_57600bps_20130502.bin.zip) to BLE Mini (CC2540) and have used BLE HCI Arduino Library (https://github.com/RedBearLab/BLE_HCI/tree/master/arduino/libraries/BLEHCI)
Edit: other similar issue;
1- (http://e2e.ti.com/support/wireless_connectivity/f/538/p/254736/1173093#1173093)
Edit 2: progress and new issues;
I've found out that default value is 5000 ms. In Software Developers' Guide (http://www.ti.com/lit/ug/swru271f/swru271f.pdf), the formula is given as below:
Effective Connection Interval = (Connection Interval) * ( 1 + (Slave Latency) )Take the following example:
Connection Interval: 80 (100ms)
Slave Latency: 4
Effective Connection Interval: (100ms) * ( 1 + 4 ) = 500ms
On (https://code.google.com/p/shred444/source/browse/trunk/Projects/ble/SimpleBLECentral/Source/simpleBLECentral.c?r=7) at line 102-103 it says:
| // Maximum connection interval (units of 1.25ms) if automatic parameter update request is enabled |
| #define DEFAULT_UPDATE_MAX_CONN_INTERVAL 800 |
I've found out that I need to change "DEFAULT_UPDATE_MAX_CONN_INTERVAL" to 80 to make it 500 ms. Yet I don't have the source code of this .bin file: (https://github.com/RedBearLab/BLE_HCI/tree/master/arduino/libraries/BLEHCI)
What do you recommend?
