WROOM-02 Resetting[Done]

[java]

Hello how are you?

I am with the WROOM-02 and when i touch the metal cage with some metallic item it resets. This also happens when I touch the reset pin or any other pin in the module. Are there any hardware considerations to avoid this issue?

Thanks for your attention,

Javier.

[Espressif_Kelly]

Hi Javier,

For EXT_RSTB, in order to avoid reset caused by external interference, the trace of EST_RSTB is generally required to be short, and external RC circuit is recommended and should be placed close to EXT_RSTB pin.

Besides, for relay application and so on, AC Ground and DC Ground should be separated and connected via a wire.

More questions， please let us know.

Thanks.

[java]

Hello Kelly, thanks for your comments. The board is powered from a power supply and from a LiPo battery. The issue is present in both power modes. I tried with an RC filter in the EXT_RST pin. Which values of R and C do you suggest?. Any other considerations with the other pins?.
Thanks for you help,

Javier.

[Espressif_Kelly]

Hi,

R=10Kohm and C=10nF for EXT_RSTB is recommended. You'd better also add RC(5K+100nF) in EN pin.

What the maximum output current of your power supply?

BTW, could you please send us the photo of your test environment for checking?

Thanks.

[java]

Hello Kelly,

The maximum output current of the 3.3V supply is 1 Amp
Here is a image of the module on the board. When I power the board from a Lipo battery the problem persists
The GND pad on the bottom of the module is disconnected. Could that be the cause of the problem?.

Thanks for your help,

Javier.

[DomalysAlexis]

Dear,

I met exactly same issues on WROOM-02. Is there a solution to fix it?
I performed following tests without positive results :
- R C on reset PIN
- RC on Enable PIN,
- DC/DC 3V - 500 mA

The module reset when it is powered by external AC/DC supply. The phenomenon disappears when the ground of the module is connected to earth. Moreover, ESP WROOM-02 does not reset with lab power supply.

Thanks
Alexis