Users Manual

4. Establish Serial Connection with ESP32-S2-MINI-1 &

ESP32-S2-MINI-1U

Figure 4-4. Setting Serial Communication in PuTTY on Linux

Then open serial port in terminal and check, if you see any log printed out by ESP32-S2.

The log contents will depend on application loaded to ESP32-S2.

Notes:

•

For some serial port wiring conﬁgurations, the serial RTS & DTR pins need to be

disabled in the terminal program before the ESP32-S2 will boot and produce serial

output. This depends on the hardware itself, most development boards (including all

Espressif boards) do not have this issue. The issue is present if RTS & DTR are wired

directly to the EN & GPIO0 pins. See the esptool documentation for more details.

• Close serial terminal after veriﬁcation that communication is working. In the next step

we are going to use a different application to upload a new ﬁrmware to ESP32-S2.

This application will not be able to access serial port while it is open in terminal.

Espressif Systems

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Sep. 2020