ESP32S3运行wifi中的softAP示例时，无wifi信号输出

[5761193jia]

自己设计了一块esp32s3板子，运行softAP例程时，完全没wifi信号出来。不知道是什么原因，如果PCB设计有问题也不至于一点wifi信号都 没有。系统是正常运行了的，输出如下：
[0;32mI (327) heap_init: At 3FCF0000 len 00008000 (32 KiB): DRAM [0m
[0;32mI (333) heap_init: At 600FE010 len 00001FF0 (7 KiB): RTCRAM [0m
[0;32mI (341) spi_flash: detected chip: winbond [0m
[0;32mI (345) spi_flash: flash io: dio [0m
[0;33mW (348) spi_flash: Detected size(16384k) larger than the size in the binary image header(2048
k). Using the size in the binary image header. [0m
[0;32mI (362) cpu_start: Starting scheduler on PRO CPU. [0m
[0;32mI (0) cpu_start: Starting scheduler on APP CPU. [0m
[0;32mI (424) wifi softAP: ESP_WIFI_MODE_AP [0m
[0;32mI (424) pp: pp rom version: e7ae62f [0m
[0;32mI (424) net80211: net80211 rom version: e7ae62f [0m
I (434) wifi:wifi driver task: 3fceec10, prio:23, stack:6656, core=0
[0;32mI (434) system_api: Base MAC address is not set [0m
[0;32mI (434) system_api: read default base MAC address from EFUSE [0m
I (444) wifi:wifi firmware version: 17afb16
I (444) wifi:wifi certification version: v7.0
I (454) wifi:config NVS flash: enabled
I (454) wifi:config nano formating: disabled
I (454) wifi:Init data frame dynamic rx buffer num: 32
I (464) wifi:Init management frame dynamic rx buffer num: 32
I (464) wifi:Init management short buffer num: 32
I (474) wifi:Init dynamic tx buffer num: 32
I (474) wifi:Init static tx FG buffer num: 2
I (484) wifi:Init static rx buffer size: 1600
I (484) wifi:Init static rx buffer num: 10
I (484) wifi:Init dynamic rx buffer num: 32
[0;32mI (494) wifi_init: rx ba win: 6 [0m
[0;32mI (494) wifi_init: tcpip mbox: 32 [0m
[0;32mI (504) wifi_init: udp mbox: 6 [0m
[0;32mI (504) wifi_init: tcp mbox: 6 [0m
[0;32mI (504) wifi_init: tcp tx win: 5744 [0m
[0;32mI (514) wifi_init: tcp rx win: 5744 [0m
[0;32mI (514) wifi_init: tcp mss: 1440 [0m
[0;32mI (524) wifi_init: WiFi IRAM OP enabled [0m
[0;32mI (524) wifi_init: WiFi RX IRAM OP enabled [0m
[0;32mI (534) phy_init: phy_version 540,a5d905b,Oct 20 2022,19:36:11 [0m
I (574) wifi:mode : softAP (f4:12:fa:cf:10:e9)
I (574) wifi:Total power save buffer number: 16
I (574) wifi:Init max length of beacon: 752/752
I (574) wifi:Init max length of beacon: 752/752
[0;32mI (574) wifi softAP: wifi_init_softap finished. SSID:myssid password:mypassword channel:1 [0m

真是不明白，请一下大佬们！

[5761193jia]

整个系统运行正常的，完全没WIFI信号输出时，与哪些因素有关呢

[ESP_Penguin_Helper]

请问当前情况是搜索不到 AP 吗？可以更换几个 Channel 检查是否问题依然存在。如果问题依然存在的话可以发出你的 pcb 布局看看吗？

[5761193jia]

请问当前情况是搜索不到 AP 吗？可以更换几个 Channel 检查是否问题依然存在。如果问题依然存在的话可以发出你的 pcb 布局看看吗？

是的，搜索不到AP。好的，我晚点更换其它channel试试。

[5761193jia]

请问当前情况是搜索不到 AP 吗？可以更换几个 Channel 检查是否问题依然存在。如果问题依然存在的话可以发出你的 pcb 布局看看吗？

换成channel 6 还是找不到AP, log信息如下:
I (341) spi_flash: detected chip: winbond
I (345) spi_flash: flash io: dio
W (348) spi_flash: Detected size(16384k) larger than the size in the binary image header(2048k). Using the size in the binary image header.
I (362) cpu_start: Starting scheduler on PRO CPU.
I (0) cpu_start: Starting scheduler on APP CPU.
I (424) wifi softAP: ESP_WIFI_MODE_AP
I (424) pp: pp rom version: e7ae62f
I (424) net80211: net80211 rom version: e7ae62f
I (434) wifi:wifi driver task: 3fceec10, prio:23, stack:6656, core=0
I (434) system_api: Base MAC address is not set
I (434) system_api: read default base MAC address from EFUSE
I (444) wifi:wifi firmware version: 17afb16
I (444) wifi:wifi certification version: v7.0
I (454) wifi:config NVS flash: enabled
I (454) wifi:config nano formating: disabled
I (454) wifi:Init data frame dynamic rx buffer num: 32
I (464) wifi:Init management frame dynamic rx buffer num: 32
I (464) wifi:Init management short buffer num: 32
I (474) wifi:Init dynamic tx buffer num: 32
I (474) wifi:Init static tx FG buffer num: 2
I (484) wifi:Init static rx buffer size: 1600
I (484) wifi:Init static rx buffer num: 10
I (484) wifi:Init dynamic rx buffer num: 32
I (494) wifi_init: rx ba win: 6
I (494) wifi_init: tcpip mbox: 32
I (504) wifi_init: udp mbox: 6
I (504) wifi_init: tcp mbox: 6
I (504) wifi_init: tcp tx win: 5744
I (514) wifi_init: tcp rx win: 5744
I (514) wifi_init: tcp mss: 1440
I (524) wifi_init: WiFi IRAM OP enabled
I (524) wifi_init: WiFi RX IRAM OP enabled
I (534) phy_init: phy_version 540,a5d905b,Oct 20 2022,19:36:11
I (574) wifi:mode : softAP (f4:12:fa:cf:10:e9)
I (574) wifi:Total power save buffer number: 16
I (574) wifi:Init max length of beacon: 752/752
I (574) wifi:Init max length of beacon: 752/752
I (574) wifi softAP: wifi_init_softap finished. SSID:myssid password:mypassword channel:6

PCB截图在附件，两层板。麻烦您了！

[5761193jia]

RF 走线区域，底层除了铺地，没过任何信号走线。

[ESP_Penguin_Helper]

有可能是晶振电容没调好，频偏太大了。你可以换成 22 pf 的电容试试看。最好可以按照下方流程实际测试下频偏

os.png (253.25 KiB) Viewed 5372 times

[5761193jia]

有可能是晶振电容没调好，频偏太大了。你可以换成 22 pf 的电容试试看。最好可以按照下方流程实际测试下频偏
os.png

晶振电容换过15pf和22pf的还是不行。没频谱分析仪，也不知道怎么调了。其它功能，如接RGB屏显示都是正常的。

[ESP_Penguin_Helper]

最大的可能是晶振电容没调好，频偏太大了。如果有 ESP32-S3 模组可以试试把晶振和电感电容都换过来看看。如果还不行的话，可能就是 PCB 的原因了。你可以把资料发到乐鑫 sales 邮箱，做一下 review。https://www.espressif.com/zh-hans/conta ... are-issues

[5761193jia]

好的，谢谢！