ESP32 Forum

Posted: **Mon Mar 19, 2018 4:53 pm**

Hello guys,

im working on my latest project and im having some issues. Im trying to connect to wifi with code like this:

Code: Select all

    WiFi.mode(WIFI_STA);
    WiFi.enableSTA(true);
    WiFi.begin(ssid, password);
    while (WiFi.status() != WL_CONNECTED) delay(1);

The problem is that it takes 3200 ms everytime. Im using my own board with WROOM32 revision 1, which is the same as on ESP32 DevkitC. On DevkitC i get 900 in average with the same code and same upload program. Any ideas? I can give u my wiring scheme if needed.

Thank you.

Posted: **Tue Mar 20, 2018 10:23 am**

Any ideas please? This can help me saving like 200 running days with this module, because im powering ESP with LiFePo4 battery. Any second for me is really important.

Posted: **Tue Mar 20, 2018 10:35 am**

From the limited information it is most likely an antenna or power problem or bad calibration. Try erasing the flash. Post a photo and a schematic and serial debug output.

Posted: **Tue Mar 20, 2018 11:27 am**

Heres the schematic:

Battery im using: http://lygte-info.dk/review/batteries20 ... %20UK.html

Heres the PCB layout:

Heres the photo of my product:

Heres the detailed look of Wroom module:

Im running my code like this:

Turning HIGH pin 13, meassuring values (this goes with no problem). Then i turn the pin low and run the WiFi. Heres the critical momment, it takes 3200 ms everytime. Then i send those data to the server, which takes about 800 ms in average (the same as ESP DevkitC V2).

Uploading sketch:

What do you mean by printing serial output? This?

How can I erase the flash please? I have never done this and im not able to find anything for esp32, only ESP8266.

Posted: **Tue Mar 20, 2018 12:04 pm**

Maybe this is related?
https://github.com/espressif/esp-idf/issues/799

Posted: **Tue Mar 20, 2018 1:14 pm**

Seems like there is a problem with arduino firmware. I have upload espidf-http-request and its connecting almost immediately (under 1 sec). I dont know what can be wrong tho.

Posted: **Tue Mar 20, 2018 3:05 pm**

Ok guys, did not know what happend but its working now. I just deleted platformio packages and deleted compiled code from this project. Did clean compile and its working. Strange

Thanks tho!

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WROOM32 wifi connection takes too long

WROOM32 wifi connection takes too long

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Re: WROOM32 wifi connection takes too long