After waking up, I try to reconnect to the configured wifi access point in station mode, which starts a channel scan of all channels even though the channel is provided in the wifi_config_t structure.
Unnecessary channel scanning takes valuable time for scanning (2300 ms) while scanning just the expected channel would only take 120 ms. (SEE LOGS).
Then It configures channel 0, and then channel 1. This only takes 50ms so I can live with it.
Finally the configured channel is configured and the connection is attempted on channel 11. This only takes 60ms.
Time = current = battery life. Reducing 2400 ms to even 400 ms would give me back more than 20% of my battery capacity, which equates to many months before the batteries go into the trash.
Code: Select all
D (879) wifi:scan end: arg=0x0, status=0, ss_state=0x7
D (879) wifi:perform scan: ss_state=0xd, chan<1,0>, dur<0,120>
D (1009) wifi:scan end: arg=0x0, status=0, ss_state=0x7
D (1009) wifi:perform scan: ss_state=0xd, chan<2,0>, dur<0,120>
D (1129) wifi:scan end: arg=0x0, status=0, ss_state=0x7
D (1129) wifi:perform scan: ss_state=0xd, chan<3,0>, dur<0,120>
D (1249) wifi:scan end: arg=0x0, status=0, ss_state=0x7
D (1249) wifi:perform scan: ss_state=0xd, chan<4,0>, dur<0,120>
D (1369) wifi:scan end: arg=0x0, status=0, ss_state=0x7
D (1369) wifi:perform scan: ss_state=0xd, chan<5,0>, dur<0,120>
D (1489) wifi:scan end: arg=0x0, status=0, ss_state=0x7
D (1489) wifi:perform scan: ss_state=0xd, chan<6,0>, dur<0,120>
D (1609) wifi:scan end: arg=0x0, status=0, ss_state=0x7
D (1609) wifi:perform scan: ss_state=0xd, chan<7,0>, dur<0,120>
D (1739) wifi:scan end: arg=0x0, status=0, ss_state=0x7
D (1739) wifi:perform scan: ss_state=0xd, chan<8,0>, dur<0,120>
D (1859) wifi:scan end: arg=0x0, status=0, ss_state=0x7
D (1859) wifi:perform scan: ss_state=0xd, chan<9,0>, dur<0,120>
D (1979) wifi:scan end: arg=0x0, status=0, ss_state=0x7
D (1979) wifi:perform scan: ss_state=0xd, chan<10,0>, dur<0,120>
D (2099) wifi:scan end: arg=0x0, status=0, ss_state=0x7
D (2099) wifi:perform scan: ss_state=0xd, chan<12,0>, dur<360,360>
D (2459) wifi:scan end: arg=0x0, status=0, ss_state=0x7
D (2459) wifi:perform scan: ss_state=0xd, chan<13,0>, dur<360,360>
D (2819) wifi:scan end: arg=0x0, status=0, ss_state=0x7
D (2829) wifi:perform scan: ss_state=0xd, chan<14,0>, dur<360,360>
D (3189) wifi:scan end: arg=0x0, status=0, ss_state=0x7
D (3189) wifi:filter: set rx policy=4
D (3189) wifi:first chan=1
D (3189) wifi:handoff_cb: status=0
D (3189) wifi:ap found, mac=e2:db:d1:b5:84:ad
D (3189) wifi:going for connection with bssid=e2:db:d1:b5:84:ad
D (3199) wifi:new_bss=0x3fc9dba8, cur_bss=0x0, new_chan=<11,0>, cur_chan=1
D (3209) wifi:filter: set rx policy=5
I (3209) wifi:new:<11,0>, old:<1,0>, ap:<255,255>, sta:<11,0>, prof:1
D (3219) wifi:connect_op: status=0, auth=5, cipher=3
D (3219) wifi:auth mode is not none
D (3219) wifi:connect_bss: auth=1, reconnect=0
I (3229) wifi:state: init -> auth (b0)
D (3229) wifi:start 1s AUTH timer
D (3229) wifi:clear scan ap list
I (3239) WIFI: Channel Change (state=2) from 1 to 11
D (3239) wifi:recv auth: seq=2, status=0
I (3249) wifi:state: auth -> assoc (0)
D (3249) wifi:restart connect 1s timer for assoc
D (3259) wifi:recv assoc: type=0x10
D (3259) wifi:filter: set rx policy=6
I (3259) wifi:state: assoc -> run (10)
D (3259) wifi:start 10s connect timer for 4 way handshake
I (3289) wifi:connected with XXXXXXXX, aid = 30, channel 11, BW20, bssid = e2:db:d1:b5:84:ad
I (3289) wifi:security: WPA2-PSK, phy: bgn, rssi: -50
D (3289) wifi:remove all except e2:db:d1:b5:84:ad from rc list
D (3289) wifi:clear blacklist
D (3299) wifi:filter: set rx policy=7
I (3299) wifi:pm start, type: 2
// Code is super straight forward:
wifi_init_config_t cfg = WIFI_INIT_CONFIG_DEFAULT();
ESP_ERROR_CHECK( esp_wifi_init(&cfg) );
ESP_ERROR_CHECK( esp_wifi_set_storage(WIFI_STORAGE_FLASH) );
ESP_ERROR_CHECK( esp_wifi_set_mode(WIFI_MODE_STA) );
esp_wifi_set_ps( WIFI_PS_MAX_MODEM );
ESP_ERROR_CHECK( esp_wifi_start() );