ESP32 Forum

ESP32 Official Forum
http://esp32.io/

How to send data over Wifi in soft Ap and station mode in ESp IDF

http://esp32.io/viewtopic.php?f=13&t=27993

Page 1 of 1

How to send data over Wifi in soft Ap and station mode in ESp IDF

Posted: Wed May 25, 2022 8:45 am
by KamalChopra
i want to connect 2 ESPs one as AP and second as station. Then send and recivee data among them.

I thought of adding UDP server example in Wifi Soft AP , UDP client already have function to make ESP act as station

but the sockets are being created but their is no connection between them even though IP, name of wifi's are same .

Can anyone help or direct me to some document to do so

Board: ESP32
using : VS code for ESP IDF

thank you

Re: How to send data over Wifi in soft Ap and station mode in ESp IDF

Posted: Thu May 26, 2022 10:10 am
by ESP_YJM
Hi KamalChopra
For SoftAP + UDP server, i think you can follow this two examples https://github.com/espressif/esp-idf/bl ... ple_main.c and https://github.com/espressif/esp-idf/tr ... udp_server. udp_server is lanuched with STA mode and you can remove it and add SoftAP mode.

For STA + UDP client, we have example https://github.com/espressif/esp-idf/tr ... udp_client.

Re: How to send data over Wifi in soft Ap and station mode in ESp IDF

Posted: Fri May 27, 2022 1:44 pm
by KamalChopra
ESP_YJM wrote: ↑
Thu May 26, 2022 10:10 am
 Hi KamalChopra
For SoftAP + UDP server, i think you can follow this two examples https://github.com/espressif/esp-idf/bl ... ple_main.c and https://github.com/espressif/esp-idf/tr ... udp_server. udp_server is lanuched with STA mode and you can remove it and add SoftAP mode.

For STA + UDP client, we have example https://github.com/espressif/esp-idf/tr ... udp_client.

I tried what you said but the code is getting stuck i don't know why can you please suggent what needs to be fixed


//==============================================================================================================
// Wifi station + UDP client side :

Code: Select all

rst:0x1 (POWERON_RESET),boot:0x13 (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:4
load:0x3fff0034,len:6896
ho 0 tail 12 room 4
load:0x40078000,len:13076
load:0x40080400,len:3900
0x40080400: _init at ??:?

entry 0x40080688
I (31) boot: ESP-IDF v4.1.3-dirty 2nd stage bootloader
I (31) boot: compile time 12:58:09
I (31) boot: chip revision: 3
I (34) boot_comm: chip revision: 3, min. bootloader chip revision: 0
I (42) boot.esp32: SPI Speed      : 40MHz
I (46) boot.esp32: SPI Mode       : DIO
I (51) boot.esp32: SPI Flash Size : 4MB
I (55) boot: Enabling RNG early entropy source...
I (61) boot: Partition Table:
I (64) boot: ## Label            Usage          Type ST Offset   Length
I (72) boot:  0 nvs              WiFi data        01 02 00009000 00006000
I (79) boot:  1 phy_init         RF data          01 01 0000f000 00001000
I (86) boot:  2 factory          factory app      00 00 00010000 00100000
I (94) boot: End of partition table
I (98) boot_comm: chip revision: 3, min. application chip revision: 0
I (105) esp_image: segment 0: paddr=0x00010020 vaddr=0x3f400020 size=0x15ec0 ( 89792) map
I (148) esp_image: segment 1: paddr=0x00025ee8 vaddr=0x3ffb0000 size=0x03180 ( 12672) load
I (154) esp_image: segment 2: paddr=0x00029070 vaddr=0x40080000 size=0x00404 (  1028) load
0x40080000: _WindowOverflow4 at /media/swapnil/Bibox/ESP_IDF/esp-idf/components/freertos/xtensa_vectors.S:1778

I (156) esp_image: segment 3: paddr=0x0002947c vaddr=0x40080404 size=0x06b9c ( 27548) load
I (176) esp_image: segment 4: paddr=0x00030020 vaddr=0x400d0020 size=0x6e1d8 (451032) map
0x400d0020: _stext at ??:?

I (348) esp_image: segment 5: paddr=0x0009e200 vaddr=0x40086fa0 size=0x0e1c4 ( 57796) load
0x40086fa0: spiflash_start at /media/swapnil/Bibox/ESP_IDF/esp-idf/components/spi_flash/esp_flash_api.c:85

I (385) boot: Loaded app from partition at offset 0x10000
I (385) boot: Disabling RNG early entropy source...
I (386) cpu_start: Pro cpu up.
I (389) cpu_start: Application information:
I (394) cpu_start: Project name:     udp_client
I (399) cpu_start: App version:      1
I (404) cpu_start: Compile time:     May 21 2022 12:57:59
I (410) cpu_start: ELF file SHA256:  f7c6e5a6d69d77d1...
I (416) cpu_start: ESP-IDF:          v4.1.3-dirty
I (421) cpu_start: Starting app cpu, entry point is 0x400812f4
0x400812f4: call_start_cpu1 at /media/swapnil/Bibox/ESP_IDF/esp-idf/components/esp32/cpu_start.c:276

I (0) cpu_start: App cpu up.
I (432) heap_init: Initializing. RAM available for dynamic allocation:
I (439) heap_init: At 3FFAE6E0 len 00001920 (6 KiB): DRAM
I (445) heap_init: At 3FFB80E8 len 00027F18 (159 KiB): DRAM
I (451) heap_init: At 3FFE0440 len 00003AE0 (14 KiB): D/IRAM
I (457) heap_init: At 3FFE4350 len 0001BCB0 (111 KiB): D/IRAM
I (464) heap_init: At 40095164 len 0000AE9C (43 KiB): IRAM
I (470) cpu_start: Pro cpu start user code
I (488) spi_flash: detected chip: generic
I (489) spi_flash: flash io: dio
I (489) cpu_start: Starting scheduler on PRO CPU.
I (0) cpu_start: Starting scheduler on APP CPU.
I (580) wifi:wifi driver task: 3ffc0680, prio:23, stack:6656, core=0
I (580) system_api: Base MAC address is not set, read default base MAC address from BLK0 of EFUSE
I (580) system_api: Base MAC address is not set, read default base MAC address from BLK0 of EFUSE
I (610) wifi:wifi firmware version: d333e55
I (610) wifi:config NVS flash: enabled
I (610) wifi:config nano formating: disabled
I (610) wifi:Init data frame dynamic rx buffer num: 32
I (620) wifi:Init management frame dynamic rx buffer num: 32
I (620) wifi:Init management short buffer num: 32
I (630) wifi:Init dynamic tx buffer num: 32
I (630) wifi:Init static rx buffer size: 1600
I (630) wifi:Init static rx buffer num: 10
I (640) wifi:Init dynamic rx buffer num: 32
I (640) wifi_init: rx ba win: 6
I (650) wifi_init: tcpip mbox: 32
I (650) wifi_init: udp mbox: 6
I (650) wifi_init: tcp mbox: 6
I (660) wifi_init: tcp tx win: 5744
I (660) wifi_init: tcp rx win: 5744
I (660) wifi_init: tcp mss: 1440
I (670) wifi_init: WiFi IRAM OP enabled
I (670) wifi_init: WiFi RX IRAM OP enabled
I (680) example_connect: Connecting to myssid...
I (680) phy_init: phy_version 4670,719f9f6,Feb 18 2021,17:07:07
I (820) wifi:mode : sta (7c:9e:bd:d8:4e:b4)
I (820) example_connect: Waiting for IP
I (2870) wifi:new:<1,1>, old:<1,0>, ap:<255,255>, sta:<1,1>, prof:1
I (3630) wifi:state: init -> auth (b0)
I (3640) wifi:state: auth -> assoc (0)
I (3660) wifi:state: assoc -> run (10)
I (3670) wifi:connected with myssid, aid = 1, channel 1, 40U, bssid = 7c:9e:bd:d8:53:f1
I (3670) wifi:security: WPA2-PSK, phy: bgn, rssi: -30
I (3670) wifi:pm start, type: 1

I (3730) wifi:AP's beacon interval = 102400 us, DTIM period = 2
I (4560) esp_netif_handlers: sta ip: 192.168.43.43, mask: 255.255.255.0, gw: 192.168.43.42
I (4560) example_connect: Got IP event!
I (5560) example_connect: Got IPv6 event!
I (5560) example_connect: Connected to myssid
I (5560) example_connect: IPv4 address: 192.168.43.43
I (5560) example_connect: IPv6 address: fe80:0000:0000:0000:7e9e:bdff:fed8:4eb4
I (5570) example: Socket created, sending to 192.168.0.165:3333
I (5580) example: Message sent

//==============================================================================================
// Wifi Ap mode + UDP server side

//=====================================================

Code: Select all

rst:0x1 (POWERON_RESET),boot:0x12 (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:4
load:0x3fff0034,len:6896
ho 0 tail 12 room 4
load:0x40078000,len:13076
load:0x40080400,len:3900
0x40080400: _init at ??:?

entry 0x40080688
I (31) boot: ESP-IDF v4.1.3-dirty 2nd stage bootloader
I (31) boot: compile time 14:39:53
I (31) boot: chip revision: 3
I (34) boot_comm: chip revision: 3, min. bootloader chip revision: 0
I (42) boot.esp32: SPI Speed      : 40MHz
I (46) boot.esp32: SPI Mode       : DIO
I (51) boot.esp32: SPI Flash Size : 4MB
I (55) boot: Enabling RNG early entropy source...
I (61) boot: Partition Table:
I (64) boot: ## Label            Usage          Type ST Offset   Length
I (72) boot:  0 nvs              WiFi data        01 02 00009000 00006000
I (79) boot:  1 phy_init         RF data          01 01 0000f000 00001000
I (86) boot:  2 factory          factory app      00 00 00010000 00100000
I (94) boot: End of partition table
I (98) boot_comm: chip revision: 3, min. application chip revision: 0
I (105) esp_image: segment 0: paddr=0x00010020 vaddr=0x3f400020 size=0x15bb0 ( 89008) map
I (148) esp_image: segment 1: paddr=0x00025bd8 vaddr=0x3ffb0000 size=0x03180 ( 12672) load
I (154) esp_image: segment 2: paddr=0x00028d60 vaddr=0x40080000 size=0x00404 (  1028) load
0x40080000: _WindowOverflow4 at /media/swapnil/Bibox/ESP_IDF/esp-idf/components/freertos/xtensa_vectors.S:1778

I (155) esp_image: segment 3: paddr=0x0002916c vaddr=0x40080404 size=0x06eac ( 28332) load
I (176) esp_image: segment 4: paddr=0x00030020 vaddr=0x400d0020 size=0x6e88c (452748) map
0x400d0020: _stext at ??:?

I (349) esp_image: segment 5: paddr=0x0009e8b4 vaddr=0x400872b0 size=0x0deb4 ( 57012) load
0x400872b0: doBacktrace at /media/swapnil/Bibox/ESP_IDF/esp-idf/components/esp32/panic.c:497

I (386) boot: Loaded app from partition at offset 0x10000
I (386) boot: Disabling RNG early entropy source...
I (386) cpu_start: Pro cpu up.
I (390) cpu_start: Application information:
I (395) cpu_start: Project name:     udp_server
I (400) cpu_start: App version:      1
I (404) cpu_start: Compile time:     May 27 2022 14:39:42
I (410) cpu_start: ELF file SHA256:  516fc0c9329ee0d2...
I (416) cpu_start: ESP-IDF:          v4.1.3-dirty
I (422) cpu_start: Starting app cpu, entry point is 0x400812f4
0x400812f4: call_start_cpu1 at /media/swapnil/Bibox/ESP_IDF/esp-idf/components/esp32/cpu_start.c:276

I (0) cpu_start: App cpu up.
I (432) heap_init: Initializing. RAM available for dynamic allocation:
I (439) heap_init: At 3FFAE6E0 len 00001920 (6 KiB): DRAM
I (445) heap_init: At 3FFB80C0 len 00027F40 (159 KiB): DRAM
I (451) heap_init: At 3FFE0440 len 00003AE0 (14 KiB): D/IRAM
I (458) heap_init: At 3FFE4350 len 0001BCB0 (111 KiB): D/IRAM
I (464) heap_init: At 40095164 len 0000AE9C (43 KiB): IRAM
I (470) cpu_start: Pro cpu start user code
I (489) spi_flash: detected chip: generic
I (489) spi_flash: flash io: dio
I (489) cpu_start: Starting scheduler on PRO CPU.
I (0) cpu_start: Starting scheduler on APP CPU.
I (585) wifi:wifi driver task: 3ffc08f0, prio:23, stack:6656, core=0
I (585) system_api: Base MAC address is not set, read default base MAC address from BLK0 of EFUSE
I (585) system_api: Base MAC address is not set, read default base MAC address from BLK0 of EFUSE
I (615) wifi:wifi firmware version: d333e55
I (615) wifi:config NVS flash: enabled
I (615) wifi:config nano formating: disabled
I (615) wifi:Init data frame dynamic rx buffer num: 32
I (615) wifi:Init management frame dynamic rx buffer num: 32
I (625) wifi:Init management short buffer num: 32
I (625) wifi:Init dynamic tx buffer num: 32
I (635) wifi:Init static rx buffer size: 1600
I (635) wifi:Init static rx buffer num: 10
I (645) wifi:Init dynamic rx buffer num: 32
I (645) wifi_init: rx ba win: 6
I (645) wifi_init: tcpip mbox: 32
I (655) wifi_init: udp mbox: 6
I (655) wifi_init: tcp mbox: 6
I (665) wifi_init: tcp tx win: 5744
I (665) wifi_init: tcp rx win: 5744
I (665) wifi_init: tcp mss: 1440
I (675) wifi_init: WiFi IRAM OP enabled
I (675) wifi_init: WiFi RX IRAM OP enabled
I (685) phy_init: phy_version 4670,719f9f6,Feb 18 2021,17:07:07
I (785) wifi:mode : softAP (7c:9e:bd:d8:53:f1)
I (795) wifi:Total power save buffer number: 16
I (795) wifi:Init max length of beacon: 752/752
I (795) wifi:Init max length of beacon: 752/752
I (795) wifi softAP WITH udp: wifi_init_softap finished. SSID:myssid password:mypassword channel:1
I (805) wifi softAP WITH udp: Socket created
I (815) wifi softAP WITH udp: Socket bound, port 3333
I (815) wifi softAP WITH udp: Waiting for data
I (2885) wifi:new:<1,1>, old:<1,1>, ap:<1,1>, sta:<255,255>, prof:1
I (2885) wifi:station: 7c:9e:bd:d8:4e:b4 join, AID=1, bgn, 40U
I (2905) wifi softAP WITH udp: station 7c:9e:bd:d8:4e:b4 join, AID=1
I (2925) esp_netif_lwip: DHCP server assigned IP to a station, IP is: 192.168.43.43
what i have found the connection is being formed between wifi AP and wifi station and also sockets are being created both side

OnUDP client side : after socket are formed the UDP sents a packet and waits to receive a packet but here after sending the packet but gets stuck on receive function that is where it has to receive the packet from the UDP server

int len = recvfrom(sock, rx_buffer, sizeof(rx_buffer) - 1, 0, (struct sockaddr *)&source_addr, &socklen);



On UDP server side : after socket is formed the UDP first hast to receive the packet form the cient but that's not happing it is getting stuck at :

int len = recvfrom(sock, rx_buffer, sizeof(rx_buffer) - 1, 0, (struct sockaddr *)&source_addr, &socklen);


Is their a fault in IP address or something else; if yes from where to change it

thanks,

Re: How to send data over Wifi in soft Ap and station mode in ESp IDF

Posted: Mon May 30, 2022 6:52 am
by ESP_YJM
Do the IP 192.168.0.165 is your UDP server address, alsp your SotAP address. I saw your UDP client send data to this IP address. Besides, those example is only an example for user to test. You can change it when you know the socket programming.

Re: How to send data over Wifi in soft Ap and station mode in ESp IDF

Posted: Tue Jan 03, 2023 11:35 am
by xien551
Hi, YJM.

I have try the UDP server with soft AP following your suggesting. And the client programe is modified to send message to "255.255.255.255". The udp server succeed to resiceve the message from udp client.

So my question is : what is the IP of SoftAP for eps32. "192.168.0.1" is wrong. Need I set it myself, or there is a default one? Thanks!

Re: How to send data over Wifi in soft Ap and station mode in ESp IDF

Posted: Wed Jan 04, 2023 3:00 am
by ESP_YJM
It has the default softap ip 192.168.4.1.

Re: How to send data over Wifi in soft Ap and station mode in ESp IDF

Posted: Mon Jan 09, 2023 4:17 am
by xien551
Thank you, YJM.

Well, I tried "192.168.0.1" again sereral day ago, but it succeed, and I just don't know the reason. Maybe the UDP sever is binding for any IP, as the setting code.

dest_addr_ip4->sin_addr.s_addr = htonl(INADDR_ANY);

Re: How to send data over Wifi in soft Ap and station mode in ESp IDF

Posted: Tue Jan 10, 2023 12:39 am
by mbratch
...but their is no connection between them even though IP, name of wifi's are same .
Can you clarify this a bit? Which IPs and names are the same? You don't mean of your two ESPs, do you?
All times are UTC
Page 1 of 1
Powered by phpBB® Forum Software © phpBB Limited
https://www.phpbb.com/