Customer:
I have a Dasduino CONNECTPLUS (ESP32) and every time I try to upload code I get an error: Failed to connect to esp32: wrong boot mode detected(0xb)! The chip needs to be in download mode.
I’ve already tried changing the port, cable, and computer. I’ve checked the drivers and nothing helped. I also tried using the user button to enter download mode, but that didn’t work either.
How can I solve this problem?
Original message (Croatian)
Kupila sam vaš Dasduino CONNECTPLUS(ESP32) i svaki put kad pokušam uploadati kod pojavi se error koji glasi: Failed to connect to esp32: wrong boot mode detected(0xb)! The chip needs to be in download mode.
Već sam probala zamijeniti port, kabel i računalo. Provjerila sam drajvere i ništa nije pomoglo, pokušala sam i pomoću tipke user doći u download moad, ali bilo je uzalud.
Kako bi mogla riješiti svoj problem?
Originally submitted via email support on 17 August 2025. Migrated to the forum for community visibility.
Soldered Support:
Make sure you’re using the board definitions we’ve prepared for our boards. The full procedure is detailed in this tutorial: Arduino - Arduino Quick Start Guide | Soldered Documentation. Problems sometimes occur when certain pins on the board are connected to hardware incorrectly. Pay special attention to the IO2 pin – during code upload it must be disconnected and should not be connected to any external components. Try uploading code to the board when it’s connected only via USB-C cable.
Original message (Croatian)
Žao nam je što imate poteškoća. Prije svega, koristite li definicije pločica koje smo pripremili za naše boardove? Cijeli postupak detaljno je opisan u ovom tutorijalu: Arduino - Arduino Quick Start Guide | Soldered Documentation. Problemi se ponekad javljaju i kada su pojedini pinovi na pločici spojeni na hardver na neispravan način. Posebno obratite pažnju na IO2 pin – prilikom uploadanja koda mora biti odspojen i ne smije biti spojen ni na kakve vanjske komponente. Molimo vas da pokušate uploadati kod na pločicu kada je spojena samo putem USB-C kabela i javite nam rezultate.
Customer:
I was able to solve the problem after disconnecting the component from the IO2 pin as you suggested.
Original message (Croatian)
Uspjela sam riješiti problem, nakon što sam odspojila komponentu s IO2 pina kao što ste rekli. Hvala.
-------- Izvorna poruka --------
Šalje: [name removed]
Datum: čet, 21. kol 2025. 11:02
Prima: [name removed]