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fix potential connectivity issues

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This commit is contained in:
phaseloop
2025-12-10 10:30:35 +00:00
parent 0489e8708f
commit cc4fd51c88
1 changed files with 11 additions and 2 deletions
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13
src/platform/nrf52/NRF52Bluetooth.cpp
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@@ -64,6 +64,10 @@ void onConnect(uint16_t conn_handle)
connection->getPeerName(central_name, sizeof(central_name));
LOG_INFO("BLE Connected to %s", central_name);
// Clear the last ToRadio packet buffer to avoid rejecting first packet from new connection
// This is done onConnect too because we suspect in some cases onDisconnect callback may be missing
memset(lastToRadio, 0, sizeof(lastToRadio));
// negotiate connections params as soon as possible
// some phones and laptops seem to ignore GAP preferred settings and treat slave latency as connection disruption
// such devices can not connect to the node. This is fixed by forcing parameter negotiation at the start of communication
@@ -76,7 +80,12 @@ void onConnect(uint16_t conn_handle)
newParams.slave_latency = 5;
newParams.conn_sup_timeout = 400; // in 10 ms units, timeout 4s
sd_ble_gap_conn_param_update(conn_handle, &newParams);
int ret = sd_ble_gap_conn_param_update(conn_handle, &newParams);
if(ret != NRF_SUCCESS){
LOG_INFO("BLE connection parameter negotiation failed. Error code: %x", ret);
}
// Notify UI (or any other interested firmware components)
meshtastic::BluetoothStatus newStatus(meshtastic::BluetoothStatus::ConnectionState::CONNECTED);
@@ -293,7 +302,7 @@ void NRF52Bluetooth::setup()
// Attention! Same values - latency and intervals (if added here) must also be negotiated inside onConnect method. See comments there.
Bluefruit.Periph.setConnSlaveLatency(5);
// Bluefruit.Periph.setConnSlaveLatency(5);
// min, max connection intervals are negotiated in onConnect as (24,40) [in 1.25 ms units] -> (30, 50) milliseconds.