Roger Meier's Forums

Hi,
every time i Connect do com port a reset is sent.
Is is possible to change that?
regards
Joerg

Hi Joerg,

can you elaborate on what you are connecting to? What is it that is being reset?

Roger

Ist an ESP 32
When I connect the ESP reseting

I see.

Some ESP32 boards use an external circuit that use the DTR and RST lines to operate the, for example like this: https://electronics.stackexchange.com/q ... rd-dtr-rts

When you open the serial port, some of these line might toggle. You can try to set the initial state of these lines when the port opens in the connection settings. The default is for both of these lines to be ON, but you can try other combinations and see what happens.
I have an ESP32 WROOM module, and it always either resets or enters programming mode when I open the port, depending on the initial states of the DTR and RTS signals. The circuitry is very similar to the one shown in the link above. There is no combination of these signals that will cause it to NOT reset when the port opens. If want to achieve this with my board, I have to modify the circuitry to disconnect the EN line from the influence of DTR and RTS.

I hope this helps.

Roger