Unable to connect to WiFi network on ESP32-C3

[brentru]

Board

Adafruit QTPy ESP32-C3

Device Description

Adafruit QTPy ESP32-C3

Hardware Configuration

N/A

Version

latest master

IDE Name

Arduino IDE 1.8.20

Operating System

macOS

Flash frequency

80Mhz

PSRAM enabled

no

Upload speed

115200

Description

Unable to connect to both a secure WPA2 and an insecure (open) network. The ESP32-C3 seems to disconnect and the authorization expires. The logs show that the static IP is not assigned by the AP.

I've been able to connect to this network with ESP32, ESP8266, ESP32-S2.

Output from WiFiScan's listing, showing this network:

scan start
[ 34383][V][WiFiGeneric.cpp:317] _arduino_event_cb(): SCAN Done: ID: 130, Status: 0, Results: 10
[ 34383][D][WiFiGeneric.cpp:852] _eventCallback(): Arduino Event: 1 - SCAN_DONE
...
2: iotdev (-75)*
...

It may be similar to #6379, however, reverting to commit bb09615 does not solve the issue.

Sketch

Using WiFiClientSecure library sketch, https://github.com/espressif/arduino-esp32/blob/master/libraries/WiFiClientSecure/examples/WiFiClientSecure/WiFiClientSecure.ino

Debug Message

[   290][D][WiFiGeneric.cpp:852] _eventCallback(): Arduino EventAttempting to connect to SSID: iotdev
....[  3970][V][WiFiGeneric.cpp:300] _arduino_event_cb(): STA Disconnected: SSID: iotdev, BSSID: b8:f8:53:35:4b:25, Reason: 2
[  3970][D][WiFiGeneric.cpp:852] _eventCallback(): Arduino Event: 5 - STA_DISCONNECTED
[  3977][W][WiFiGeneric.cpp:873] _eventCallback(): Reason: 2 - AUTH_EXPIRE
[  3984][D][WiFiGeneric.cpp:889] _eventCallback(): WiFi Reconnect Running
[  3994][V][WiFiGeneric.cpp:96] set_esp_interface_ip(): Configuring Station static IP: 0.0.0.0, MASK: 0.0.0.0, GW: 0.0.0.0
...[  7048][V][WiFiGeneric.cpp:300] _arduino_event_cb(): STA Disconnected: SSID: iotdev, BSSID: b8:f8:53:35:4b:25, Reason: 2
[  7048][D][WiFiGeneric.cpp:852] _eventCallback(): Arduino Event: 5 - STA_DISCONNECTED
[  7055][W][WiFiGeneric.cpp:873] _eventCallback(): Reason: 2 - AUTH_EXPIRE
[  7062][D][WiFiGeneric.cpp:898] _eventCallback(): WiFi AutoReconnect Running
[  7070][V][WiFiGeneric.cpp:96] set_esp_interface_ip(): Configuring Station static IP: 0.0.0.0, MASK: 0.0.0.0, GW: 0.0.0.0
.

Other Steps to Reproduce

No response

I have checked existing issues, online documentation and the Troubleshooting Guide

• I confirm I have checked existing issues, online documentation and Troubleshooting guide.

[brentru]

I've disabled the USB serial to follow the issue @ladyada was having in #6264 (comment), still getting a crash when attempting to connect.

Attempting to connect to SSID: iotdev
[   418][D][WiFiGeneric.cpp:808] _eventCallback(): Arduino Event: 0 - WIFI_READY
[   535][V][WiFiGeneric.cpp:272] _arduino_event_cb(): STA Started
[   536][D][WiFiGeneric.cpp:808] _eventCallback(): Arduino Event: 2 - STA_START
[   539]€ESP-ROM:esp32c3-api1-20210207
Build:Feb  7 2021
rst:0x13 (GLITCH_RTC_RST),boot:0xd (SPI_FAST_FLASH_BOOT)
SPIWP:0xee

Open to more testing ideas if you have them!

[ladyada]

my notes: also the same hardware works great with micropython wifi projects, with native USB, and micropy is using IDF 4.3.1 (or 4.4? hard to tell) https://github.com/micropython/micropython/tree/master/ports/esp32

[me-no-dev]

there is a suspicion that this might be caused be recent change we did in WiFiSTA recently, but unfortunately it works here and I can not reproduce. @brentru could you try changing WIFI_AUTH_WPA2_PSK here to WIFI_AUTH_WPA_PSK and try again?

[brentru]

@me-no-dev Making that change does not work. If it helps, I am using a network with WPA2 security.

10:44:44.830 -> [ 16797][V][WiFiGeneric.cpp:300] _arduino_event_cb(): STA Disconnected: SSID: x, BSSID: b8:f8:53:35:4b:25, Reason: 2
10:44:44.830 -> [ 16797][D][WiFiGeneric.cpp:852] _eventCallback(): Arduino Event: 5 - STA_DISCONNECTED
10:44:44.830 -> [ 16804][W][WiFiGeneric.cpp:873] _eventCallback(): Reason: 2 - AUTH_EXPIRE
10:44:44.864 -> [ 16811][D][WiFiGeneric.cpp:898] _eventCallback(): WiFi AutoReconnect Running
10:44:44.864 -> [ 16819][V][WiFiGeneric.cpp:96] set_esp_interface_ip(): Configuring Station static IP: 0.0.0.0, MASK: 0.0.0.0, GW: 0.0.0.0
10:44:46.906 -> [ 18873][V][WiFiGeneric.cpp:300] _arduino_event_cb(): STA Disconnected: SSID: x, BSSID: 00:00:00:00:00:00, Reason: 201
10:44:46.906 -> [ 18874][D][WiFiGeneric.cpp:852] _eventCallback(): Arduino Event: 5 - STA_DISCONNECTED
10:44:46.906 -> [ 18881][W][WiFiGeneric.cpp:873] _eventCallback(): Reason: 201 - NO_AP_FOUND
10:44:46.939 -> [ 18888][D][WiFiGeneric.cpp:898] _eventCallback(): WiFi AutoReconnect Running
10:44:46.939 -> [ 18896][V][WiFiGeneric.cpp:96] set_esp_interface_ip(): Configuring Station static IP: 0.0.0.0, MASK: 0.0.0.0, GW: 0.0.0.0

[brentru]

@me-no-dev Here's the output of connecting to an open (no password) network. Note that an ESP32, ESP32-S2 were successfully able to connect to both of these networks.

10:45:43.607 -> [   296][D][WiFiGeneric.cpp:852] _eventCallback(): Arduino Event[  3437][V][WiFiGeneric.cpp:300] _arduino_event_cb(): STA Disconnected: SSID: iotdev, BSSID: 6a:f8:53:35:4b:27, Reason: 4
10:45:44.105 -> [  3438][D][WiFiGeneric.cpp:852] _eventCallback(): Arduino Event: 5 - STA_DISCONNECTED
10:45:44.138 -> [  3445][W][WiFiGeneric.cpp:873] _eventCallback(): Reason: 4 - ASSOC_EXPIRE

[SuGlider]

@brentru
Could you please try running WiFi.useStaticBuffers(true); before WiFi.mode(...) and WiFi.begin(...)
I think it may have something to do with C3 sdkconfig parameters related to WiFi dynamic/static and cache buffers.

Please let me know. Thanks.

[brentru]

@SuGlider It pushes it a bit further, but seems to be intermittently working.

Successful Output from WiFiClientSecure

14:07:02.967 -> [   296][D][WiFiGeneric.cpp:852] _eventCallback(): Arduino Event[  2417][V][WiFiGeneric.cpp:300] _arduino_event_cb(): STA Disconnected: SSID: X, BSSID: b8:f8:53:35:4b:25, Reason: 2
14:07:04.941 -> [  2418][D][WiFiGeneric.cpp:852] _eventCallback(): Arduino Event: 5 - STA_DISCONNECTED
14:07:04.974 -> [  2425][W][WiFiGeneric.cpp:873] _eventCallback(): Reason: 2 - AUTH_EXPIRE
14:07:04.974 -> [  2431][D][WiFiGeneric.cpp:889] _eventCallback(): WiFi Reconnect Running
14:07:04.974 -> [  2439][V][WiFiGeneric.cpp:96] set_esp_interface_ip(): Configuring Station static IP: 0.0.0.0, MASK: 0.0.0.0, GW: 0.0.0.0
14:07:08.110 -> [  5583][V][WiFiGeneric.cpp:295] _arduino_event_cb(): STA Connected: SSID: X, BSSID: b8:f8:53:35:4b:25, Channel: 6, Auth: WPA2_PSK
14:07:08.110 -> [  5584][D][WiFiGeneric.cpp:852] _eventCallback(): Arduino Event: 4 - STA_CONNECTED
14:07:10.340 -> [  7789][V][WiFiGeneric.cpp:305] _arduino_event_cb(): STA Got New IP:192.168.1.213
14:07:10.340 -> [  7790][D][WiFiGeneric.cpp:852] _eventCallback(): Arduino Event: 7 - STA_GOT_IP
14:07:10.340 -> [  7793][D][WiFiGeneric.cpp:914] _eventCallback(): STA IP: 192.168.1.213, MASK: 255.255.255.0, GW: 192.168.1.1
14:07:10.902 -> [  8358][V][ssl_client.cpp:62] start_ssl_client(): Free internal heap before TLS 232332
14:07:10.902 -> [  8360][V][ssl_client.cpp:68] start_ssl_client(): Starting socket
14:07:10.971 -> [  8445][V][ssl_client.cpp:144] start_ssl_client(): Seeding the random number generator
14:07:10.971 -> [  8447][V][ssl_client.cpp:153] start_ssl_client(): Setting up the SSL/TLS structure...
14:07:11.007 -> [  8451][V][ssl_client.cpp:176] start_ssl_client(): Loading CA cert
14:07:11.007 -> [  8459][V][ssl_client.cpp:252] start_ssl_client(): Setting hostname for TLS session...
14:07:11.007 -> [  8463][V][ssl_client.cpp:267] start_ssl_client(): Performing the SSL/TLS handshake...
14:07:12.276 -> [  9738][V][ssl_client.cpp:288] start_ssl_client(): Verifying peer X.509 certificate...
14:07:12.276 -> [  9739][V][ssl_client.cpp:296] start_ssl_client(): Certificate verified.
14:07:12.276 -> [  9741][V][ssl_client.cpp:311] start_ssl_client(): Free internal heap after TLS 200896
14:07:12.313 -> [  9759][V][ssl_client.cpp:364] send_ssl_data(): Writing HTTP request with 46 bytes...
14:07:12.313 -> [  9761][V][ssl_client.cpp:364] send_ssl_data(): Writing HTTP request with 2 bytes...
14:07:12.313 -> [  9768][V][ssl_client.cpp:364] send_ssl_data(): Writing HTTP request with 23 bytes...
14:07:12.313 -> [  9775][V][ssl_client.cpp:364] send_ssl_data(): Writing HTTP request with 2 bytes...
14:07:12.313 -> [  9783][V][ssl_client.cpp:364] send_ssl_data(): Writing HTTP request with 17 bytes...
14:07:12.313 -> [  9791][V][ssl_client.cpp:364] send_ssl_data(): Writing HTTP request with 2 bytes...
14:07:12.350 -> [  9798][V][ssl_client.cpp:364] send_ssl_data(): Writing HTTP request with 2 bytes...
14:07:13.465 -> [ 10920][V][ssl_client.cpp:319] stop_ssl_socket(): Cleaning SSL connection.
14:07:13.465 -> [ 10921][V][ssl_client.cpp:319] stop_ssl_socket(): Cleaning SSL connection.

I reset the board and it connected, then immediately disconnected. Was unable to re-join.

14:08:19.995 -> [  2450][V][WiFiGeneric.cpp:96] set_esp_interface_ip(): Configuring Station static IP: 0.0.0.0, MASK: 0.0.0.0, GW: 0.0.0.0
14:08:22.132 -> [  4567][V][WiFiGeneric.cpp:295] _arduino_event_cb(): STA Connected: SSID: x, BSSID: b8:f8:53:35:4b:25, Channel: 6, Auth: WPA2_PSK
14:08:22.132 -> [  4569][D][WiFiGeneric.cpp:852] _eventCallback(): Arduino Event: 4 - STA_CONNECTED
14:08:37.345 -> [ 19802][V][WiFiGeneric.cpp:300] _arduino_event_cb(): STA Disconnected: SSID: x, BSSID: b8:f8:53:35:4b:25, Reason: 7
14:08:37.345 -> [ 19803][D][WiFiGeneric.cpp:852] _eventCallback(): Arduino Event: 5 - STA_DISCONNECTED
14:08:37.383 -> [ 19809][W][WiFiGeneric.cpp:873] _eventCallback(): Reason: 7 - NOT_ASSOCED

[brentru]

@SuGlider Ok, so, calling WiFi.mode(WIFI_STA) after WiFi.useStaticBuffers(true) and before WiFi.begin(...) seems to be repeatedly working for the WiFiClientSecure sketch.

However, it fails when I test WiFiClient instead of WiFiClientSecure (we have a test sketch here - https://learn.adafruit.com/adafruit-qt-py-esp32-c3-wifi-dev-board/wifi-test#wifi-connection-test-3077319-8)

14:14:18.519 -> [  4437][V][WiFiGeneric.cpp:295] _arduino_event_cb(): STA Connected: SSID: x, BSSID: b8:f8:53:35:4b:25, Channel: 6, Auth: WPA2_PSK
14:14:18.519 -> [  4439][D][WiFiGeneric.cpp:852] _eventCallback(): Arduino Event: 4 - STA_CONNECTED
14:14:19.258 -> [  5176][V][WiFiGeneric.cpp:305] _arduino_event_cb(): STA Got New IP:192.168.1.213
14:14:19.258 -> [  5177][D][WiFiGeneric.cpp:852] _eventCallback(): Arduino Event: 7 - STA_GOT_IP
14:14:19.258 -> [  5180][D][WiFiGeneric.cpp:914] _eventCallback(): STA IP: 192.168.1.213, MASK: 255.255.255.0, GW: 192.168.1.1
14:14:19.942 -> [  5873][D][WiFiClient.cpp:528] connected(): Disconnected: RES: 0, ERR: 128

[SuGlider]

@brentru

Well, that's an improvement from the previous situation. It seems that the issue is really related to static cache configuration from sdkconfig.

Are both sketches, used for testing it, in the link you sent here?
I'll test it more here and try to find out something else.

[brentru]

@SuGlider The first test is https://github.com/espressif/arduino-esp32/blob/master/libraries/WiFiClientSecure/examples/WiFiClientSecure/WiFiClientSecure.ino

The second test is https://learn.adafruit.com/adafruit-qt-py-esp32-c3-wifi-dev-board/wifi-test#wifi-connection-test-3077319-8