paulfjujo asked 3 months ago
hello,
if ESP32 can see the WIFI LANs around it ( ie: with Wifiscan application ) ..thet means EPS32 receiving…. is OK
but if no way to connect it to my Wifi Lan (with other applications like Webserver, websocket …etc …,)
is it possible that problem is due to a bad Channel number … so can’t reach my wifi lan
my Wifi LAN channel is 11.
wifiscan result
Start your code here
rst:0x1 (POWERON_RESET),boot:0x17 (SPI_FAST_FLASH_BOOT)
configsip: 0, SPIWP:0xee
clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
mode:DIO, clock div:2
load:0x3fff0030,len:1184
load:0x40078000,len:12776
load:0x40080400,len:3032
entry 0x400805e4
WIFISCAN version : 19-02-2023
Hardware : ESP32 <Bleu> VROMM-32 DEVKITV1 30 pins
Aduino IDE V 1.8.19
Set WiFi to STAtion
PORT OPEN 115200
Communication with MCU..Got answer! Communication with MCU established.
AutoDetect firmware…
Can’t autodetect firmware, because proper answer not received (may be unknown firmware).
Please, reset module or continue.
can start
scan done
3 networks found
1: ON_AIR2022 (-67)*
2: DIRECT-K8-BRAVIA (-73)*
3: sainmo4958 (-94)*
scan start
scan done
2 networks found
1: ON_AIR2022 (-68)*
2: DIRECT-K8-BRAVIA (-72)*
--------------------------------------- i can now confirm : probleme is channel number whis another application on ESP32 https://1drv.ms/u/s!AgSdoVts608TiTm0yfpFv7kpb4xv?e=VZjFhA i get with a Android wifi scanner Appli Android Wifi Man Liste Wifi On AIR2022 canal 11 -62 db CH11 2432-2472 ( My WifiLAN) DIRECT-K8-BRAVIA canal 11 -74db (TV) et aussi : ESP_8DC995 canal 1 -47db MAC adress : 08:3A:F2:8D:C9:95 <- ESP32 bleu !! CH1 : 2402-2442 Mhz so,now y question is: How to change this channel number on ESP32? ( i don't want to change the channel on my personnal WLAN (freebox config)
Sara Santos Staff answered 3 months ago
Hi.
I think you need the following two lines:
wifi_promiscuous_enable(1);
wifi_set_channel(channel);
In which CHANNEL is the new wi-fi channel you want to set.
Let me know if this helps.
Regards,
Sara
paulfjujo answered 3 months ago
hello Sara,
Sorry, this doesn’t work .. i get compile error , commande not reconnized
i tested this
change value in
C:\Users\Paul\AppData\Local\Arduino15\packages\esp32\hardware\esp32\2.0.2\libraries\WiFi\src\WiFiGeneric.h
WiFiGeneric.h
bool initiateFTM(uint8_t frm_count=16, uint16_t burst_period=2, uint8_t channel=11, const uint8_t * mac=NULL); channel value was 1, changed to 11 but no effect ..
My ESP32 is seeing as ESP_8DC9595 Channel 1 as WIFI LAN
what is also strange because at compile, Chip is ESP32-D0WDQ6 (revision 1) Features: WiFi, BT, Dual Core, 240MHz, VRef calibration in efuse, Coding Scheme None Crystal is 40MHz MAC: 08:3a:f2:8d:c9:94
ESP name ended with 95 instead of 94
The channel change in the code *.h , has NO effect
i think the solution is not so far … but where ?
Sara Santos Staff answered 3 months ago
I’m sorry. I copied the wrong instructions.
You need to include this:
#include <esp_wifi.h>
Then, use the following after setting the WiFi mode
WiFi.printDiag(Serial); // Uncomment to verify channel number before
esp_wifi_set_promiscuous(true);
esp_wifi_set_channel(REPLACE_WITH_CHANNEL_NUMBER, WIFI_SECOND_CHAN_NONE);
esp_wifi_set_promiscuous(false);
WiFi.printDiag(Serial); // Uncomment to verify channel change afterLet me know if this helps.
We used that snippet in this project and it worked fine.
Regards,
Sara