Low Power Interoperability Considerations#

• It is recommended to set the device into Connected Power Save Mode only after IP configuration.

• If a wireless disconnection happens when the NWP is in Power Save Mode, disable the power save and reconnect to the AP.

• To avoid interoperability issues with various APs, enable the Enhanced Max PSP feature.

• For applications where throughput is not a major concern, consider disabling the higher data rates (MCS5, MCS6, and MCS7).

  • To do this, enable BIT(19): SL_SI91X_FEAT_DISABLE_MCS_5_6_7_DATARATES in config_feature_bit_map in the boot configuration.

• In power save modes, if the DNS requests fail with a few APs, the SL_SI91X_FEAT_AGGREGATION in feature_bit_map is to be enabled in boot configuration. If this does not help, it is recommended to disable the power save and then make a DNS request API call and configure the device back into power save mode.

  • The above recommendation works in case of socket connection failures as well.