ESP32, Wi-Fi, wifi_scan

ESP32, Wi-Fi, wifi_scan

make menuconfig 를 통해 ssid, password를 지정하도록 되어 있습니다.

0. 참고 사이트

• esp-idf\examples\wifi\scan
• https://github.com/espressif/esp-idf/tree/master/examples/wifi/scan
  

1. 모듈

2. 보드 연결

3. 소스 설명

4. 소스

https://github.com/sglee0223/esp32/tree/master/wifi_scan

5. 결과 확인

scan: SYSTEM_EVENT_STA_START 로그 이후에 동작 방향이 달라집니다.

• 기본 설정인 경우

I (0) cpu_start: App cpu up. I (346) heap_init: Initializing. RAM available for dynamic allocation: I (353) heap_init: At 3FFAE6E0 len 00001920 (6 KiB): DRAM I (359) heap_init: At 3FFB9E08 len 000261F8 (152 KiB): DRAM I (365) heap_init: At 3FFE0440 len 00003BC0 (14 KiB): D/IRAM I (372) heap_init: At 3FFE4350 len 0001BCB0 (111 KiB): D/IRAM I (378) heap_init: At 400902A8 len 0000FD58 (63 KiB): IRAM I (384) cpu_start: Pro cpu start user code I (67) cpu_start: Starting scheduler on PRO CPU. I (0) cpu_start: Starting scheduler on APP CPU. I (113) wifi: wifi driver task: 3ffc17b0, prio:23, stack:4096, core=0 I (113) wifi: wifi firmware version: 4fd6a2c I (113) wifi: config NVS flash: enabled I (113) wifi: config nano formating: disabled I (123) system_api: Base MAC address is not set, read default base MAC address from BLK0 of EFUSE I (133) system_api: Base MAC address is not set, read default base MAC address from BLK0 of EFUSE I (153) wifi: Init dynamic tx buffer num: 32 I (153) wifi: Init data frame dynamic rx buffer num: 32 I (153) wifi: Init management frame dynamic rx buffer num: 32 I (163) wifi: Init static rx buffer size: 1600 I (163) wifi: Init static rx buffer num: 10 I (163) wifi: Init dynamic rx buffer num: 32 I (243) phy: phy_version: 3910, c0c45a3, May 21 2018, 18:07:06, 0, 0 I (243) wifi: mode : sta (30:ae:a4:15:20:9c) I (243) scan: SYSTEM_EVENT_STA_START I (2663) scan: SYSTEM_EVENT_STA_DISCONNECTED I (5073) scan: SYSTEM_EVENT_STA_DISCONNECTED I (7493) scan: SYSTEM_EVENT_STA_DISCONNECTED I (9903) scan: SYSTEM_EVENT_STA_DISCONNECTED

• ssid, passwd 지정한 겨우
  

I (0) cpu_start: App cpu up. I (346) heap_init: Initializing. RAM available for dynamic allocation: I (353) heap_init: At 3FFAE6E0 len 00001920 (6 KiB): DRAM I (359) heap_init: At 3FFB9E08 len 000261F8 (152 KiB): DRAM I (365) heap_init: At 3FFE0440 len 00003BC0 (14 KiB): D/IRAM I (372) heap_init: At 3FFE4350 len 0001BCB0 (111 KiB): D/IRAM I (378) heap_init: At 400902A8 len 0000FD58 (63 KiB): IRAM I (384) cpu_start: Pro cpu start user code I (67) cpu_start: Starting scheduler on PRO CPU. I (0) cpu_start: Starting scheduler on APP CPU. I (92) wifi: wifi driver task: 3ffc17b0, prio:23, stack:4096, core=0 I (92) wifi: wifi firmware version: 4fd6a2c I (92) wifi: config NVS flash: enabled I (92) wifi: config nano formating: disabled I (102) system_api: Base MAC address is not set, read default base MAC address from BLK0 of EFUSE I (112) system_api: Base MAC address is not set, read default base MAC address from BLK0 of EFUSE I (132) wifi: Init dynamic tx buffer num: 32 I (132) wifi: Init data frame dynamic rx buffer num: 32 I (132) wifi: Init management frame dynamic rx buffer num: 32 I (132) wifi: Init static rx buffer size: 1600 I (142) wifi: Init static rx buffer num: 10 I (142) wifi: Init dynamic rx buffer num: 32 I (222) phy: phy_version: 3910, c0c45a3, May 21 2018, 18:07:06, 0, 0 I (222) wifi: mode : sta (30:ae:a4:15:20:9c) I (222) scan: SYSTEM_EVENT_STA_START I (2642) wifi: n:1 0, o:1 0, ap:255 255, sta:1 0, prof:1 I (3622) wifi: state: init -> auth (b0) I (3622) wifi: state: auth -> assoc (0) I (3632) wifi: state: assoc -> run (10) I (4102) wifi: connected with iptime, channel 1 I (4112) wifi: pm start, type: 1 I (5042) event: sta ip: 192.168.0.9, mask: 255.255.255.0, gw: 192.168.0.1 I (5042) scan: SYSTEM_EVENT_STA_GOT_IP I (5042) scan: Got IP: 192.168.0.9