QUERY · ISSUE

How to set BLE connection interval?

openby jd3096-mpyopened 2021-09-10updated 2021-09-16

extmod

SO,how to set BLE connection interval?
when the devices are connected,i want to save more power,so i want to increase the conncetion interval ,but i can't find how to redefine this param.
adv and scan interval is easily to set,i can't find the way to set connnection interval
i notice that IRQ has this event:
elif event == _IRQ_CONNECTION_UPDATE:
conn_handle, conn_interval, conn_latency, supervision_timeout, status = data
how to update connection,to change conn_interval, conn_latency, supervision_timeout

CANDIDATE · PULL REQUEST

extmod/modbluetooth.c: Add connection interval to gap_connect.

closedby jimmoopened 2021-10-22updated 2021-10-25

extmod

Just forwards through directly to the NimBLE and BTStack connect functions.

MicroPython doesn't currently have a way to obtain the connection interval, so tested (on unix+nimble and pybd+btstack) by logging the connection interval during connection.

Assessment

S Sonnet · high

The query issue asks how to set the BLE connection interval for power-saving purposes. PR #7921 directly implements this by adding min_conn_interval_us and max_conn_interval_us parameters to BLE.gap_connect(), forwarded to NimBLE and BTStack backends. This is exactly the capability requested. Classification is LIKELY_DUPLICATE rather than DUPLICATE because the PR's merge status is not confirmed, and the approach (setting interval at connect time) may not fully cover the case of updating interval on an already-established connection, which the issue also references via _IRQ_CONNECTION_UPDATE.

Suggested action

If PR #7921 has been merged, close issue #7769 as resolved by it. If the PR only handles setting the interval at connect time and not updating it on an existing connection, note this gap in the issue before closing.

How to set BLE connection interval?

extmod/modbluetooth.c: Add connection interval to gap_connect.

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