ESP32 Forum

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.

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

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.