softdevice returned invalid parameter error for these parameters

[xuefei]

During a sd_ble_conn_param_update() call, S332 softdevice returned invalid parameter error for:

min_conn_interval = 10

max_conn_interval = 800

slave_latency = 2

conn_sup_timeout = 400

According to this link, these values should be well within valid range, why would the softdevice return invalid parameter error in this case?

[Petter Myhre]

Per spec the following equation must be valid:

connSupervisionTimeout > (connInterval * 2 * (connSlaveLatency + 1))

See this for more information.

[xuefei]

Thanks for the reply. The interesting thing is these parameters are peripheral preferred connection parameters, not sure why the sensor would return this set if it's invalid

[Petter Myhre]

What do you mean? That sd_ble_gap_ppcp_set() does not return an error when you use these parameters?