ESP32 DevKit v1, default Serial monitor speed

elect86
Posts: 1
Joined: Fri Nov 07, 2025 10:51 am

ESP32 DevKit v1, default Serial monitor speed

Postby elect86 » Fri Nov 07, 2025 10:56 am

Hi,

if I don't set any speed, I get only garbage, I tested all the following speeds:

300
600
750
1200
2400
4800
9600
19200
31250
38400
57600
74880
115200
230400
250000
460800
500000
921600
1000000
2000000

Always garbage

But if I explicitly set `Serial.begin(x)` then it works flawless

So, what's the default speed in case I don't see anything?

lbernstone
Posts: 1132
Joined: Mon Jul 22, 2019 3:20 pm

Re: ESP32 DevKit v1, default Serial monitor speed

Postby lbernstone » Sat Nov 08, 2025 12:41 am

The boot log runs at 115200, as does the default uart console. Arduino expects to take over the default console when you call Serial.begin. Arduino does not write to the default console, so once you call Serial.begin, a bare print statement will go to /dev/null.

Who is online

Users browsing this forum: Google [Bot], Qwantbot and 2 guests