pohui_pohui/firmware
1
0
Fork 0
mirror of https://github.com/meshtastic/firmware.git synced 2025-10-27 15:02:41 +00:00
Code Issues Actions 8 Packages Projects Releases Wiki Activity

requestLowerPowerConnection

Browse Source
This commit is contained in:
Mike Robbins 2025-10-17 21:43:03 -04:00
parent 00b95704fa
commit 492e2ae5e5
1 changed files with 40 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

39
src/nimble/NimbleBluetooth.cpp
View File

@ -591,9 +591,15 @@ class NimbleBluetoothServerCallback : public NimBLEServerCallbacks
constraints, and recommendations. (Android doesn't have specific constraints, but seems to be compatible with the Apple
recommendations.)
Selected settings:
minInterval (units of 1.25ms): 7.5ms = 6 (lower than the Apple recommended minimum, but allows faster when the client
supports it.) maxInterval (units of 1.25ms): 15ms = 12 latency: 0 (don't allow peripheral to skip any connection events)
supports it.)
maxInterval (units of 1.25ms): 15ms = 12
latency: 0 (don't allow peripheral to skip any connection events)
timeout (units of 10ms): 6 seconds = 600 (supervision timeout)
These are intentionally aggressive to prioritize speed over power consumption, but are only used for a few seconds at
setup. Not worth adjusting much.
*/
LOG_INFO("BLE requestHighThroughputConnection");
#ifdef NIMBLE_TWO
@ -602,6 +608,37 @@ class NimbleBluetoothServerCallback : public NimBLEServerCallbacks
bleServer->updateConnParams(desc->conn_handle, 6, 12, 0, 600);
#endif
}
#ifdef NIMBLE_TWO
void requestLowerPowerConnection(NimBLEConnInfo &connInfo)
#else
void requestLowerPowerConnection(ble_gap_conn_desc *desc)
#endif
{
/* Request a lower power consumption (but higher latency, lower throughput) BLE connection.
This is suitable for steady-state operation after initial setup is complete.
See https://developer.apple.com/library/archive/qa/qa1931/_index.html for formulas to calculate values, iOS/macOS
constraints, and recommendations. (Android doesn't have specific constraints, but seems to be compatible with the Apple
recommendations.)
Selected settings:
minInterval (units of 1.25ms): 30ms = 24
maxInterval (units of 1.25ms): 50ms = 40
latency: 2 (allow peripheral to skip up to 2 consecutive connection events to save power)
timeout (units of 10ms): 6 seconds = 600 (supervision timeout)
There's an opportunity for tuning here if anyone wants to do some power measurements, but these should allow 10-20 packets
per second.
*/
LOG_INFO("BLE requestLowerPowerConnection");
#ifdef NIMBLE_TWO
bleServer->updateConnParams(connInfo.getConnHandle(), 24, 40, 2, 600);
#else
bleServer->updateConnParams(desc->conn_handle, 24, 40, 2, 600);
#endif
}
};
static NimbleBluetoothToRadioCallback *toRadioCallbacks;