ESP32-WROOM-32U Wifi Issues when booting

[almoritz]

Hi,

I have a board which uses the wroom-32u. It controls several transistors and reads some inputs. On IO14 and IO15 there is I2C bus attached. When I power up the board with IO14 or IO15 connected to the I2C bus, WiFi cannot connect.

When I power up the board with IO14 and IO15 removed while booting, wifi works. Plugging in those ports after boot makes the I2C bus work too.

I tried isolating the issue by hooking up an ESP-WROOM-32 dev board with IO14 & IO15 connected to I2C bus while booting, and this works just fine.

IO14 and IO15 are connected directly to pin headers.

[ESP_Sprite]

Can you define 'WiFi does not connect' and 'WiFi works'? As in: do you get any specific messages on the console indicating this?

[almoritz]

Hi,

with I2C connected to IO14&15 I get a connection loop:

WIFI_EVENT_STA_DISCONNECTED
Disconnected from wifi accesspoint AL
Reconnecting to wifi access point AL
WIFI_EVENT_STA_DISCONNECTED


wifi:new<11,0>, old:<11,0>, ap:,255,255>, sta:<11,0>,prof:1
wifi:state: init -> auth (b0)
wifi:state: auth -> assoc(0)
wifi:state: assoc -> run (10)



I tried a different network which seems to at least connect, but the connection is not stable after establishing. Once it has much throughput, it crashes.