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

43
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 constraints, and recommendations. (Android doesn't have specific constraints, but seems to be compatible with the Apple
recommendations.) recommendations.)
minInterval (units of 1.25ms): 7.5ms = 6 (lower than the Apple recommended minimum, but allows faster when the client Selected settings:
supports it.) maxInterval (units of 1.25ms): 15ms = 12 latency: 0 (don't allow peripheral to skip any connection events) minInterval (units of 1.25ms): 7.5ms = 6 (lower than the Apple recommended minimum, but allows faster when the client
timeout (units of 10ms): 6 seconds = 600 (supervision timeout) 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"); LOG_INFO("BLE requestHighThroughputConnection");
#ifdef NIMBLE_TWO #ifdef NIMBLE_TWO
@ -602,6 +608,37 @@ class NimbleBluetoothServerCallback : public NimBLEServerCallbacks
bleServer->updateConnParams(desc->conn_handle, 6, 12, 0, 600); bleServer->updateConnParams(desc->conn_handle, 6, 12, 0, 600);
#endif #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; static NimbleBluetoothToRadioCallback *toRadioCallbacks;