VS Arduino - About "ESP32S3-USB-Debugging"

Sep 8^th, 2026 at 10:11pm (UTC)

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VS Arduino › › › About "ESP32S3-USB-Debugging"

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About "ESP32S3-USB-Debugging" (Read 1217 times)

Peter D. Pruyne Newbies Offline Posts: 5 Joined: Nov 22^nd, 2024	About "ESP32S3-USB-Debugging" Nov 23^rd, 2024 at 7:22am	Print Post
	This is about this page: https://www.visualmicro.com/page/ESP32S3-USB-Debugging.aspx 1st, the sentence "If you are looking to use JTAG to debug this board please see the seperate page here." has no link. 2nd, There is an image there connecting a usb-A cable directly to gpio pins on a ESP32-32 dev board. The host usb is a 5v device, ESP32's are 3v devices. This is not supported, as described in the datasheets and also discussed on the Esspresif forum, in a thread titled "5V tolerance". https://esp32.com/viewtopic.php?t=877 My questions: 1 ) What page does the missing link refer to? 2 ) Whats up with sailing past the 3.6v gpio pin limit found in the Esspresif datasheets? 3) The pictured S3 dev board has two usb interfaces, one labeled UART. That 2nd usb connection is expressly provided for JTAG access. I have looked at your debugging examples, I can not find one that uses the USB-UART for JTAG debug. Perhaps I missed it? That what I would like to do. How do I do that?


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Simon@Visual Micro Administrator Offline Posts: 2962 Joined: Feb 13^th, 2019	Re: About "ESP32S3-USB-Debugging" Reply #1 - Nov 25^th, 2024 at 12:47pm	Print Post
	1) Documentation page updated and the link referred to the below page, where an external probe is used to connect to the JTAG pins: https://www.visualmicro.com/page/ESP32S3-JTAG-Debugging.aspx 2) This was following the Espressif documentation: https://docs.espressif.com/projects/esp-idf/en/stable/esp32s3/api-guides/jtag-de... Quote: The quickest and most convenient way to start with JTAG debugging is through a USB cable connected to the D+/D- USB pins of ESP32-S3. No need for an external JTAG adapter and extra wiring/cable to connect JTAG to ESP32-S3. 3) On that board the second USB port provides USB-JTAG which is not always available on every variant of the board. This is why we show the USB lead connected to the board which would provide the same USB-JTAG access on any board (or even just the module itself). The on-board USB port is wired to the same IO pins on their schematic (which have the zener diodes for the voltage limiting): https://dl.espressif.com/dl/schematics/SCH_ESP32-S3-DevKitC-1_V1.1_20221130.pdf The USB-UART Debugging will work the same just connected via the "USB" port on the board, the driver needs installing for the same interface, and the same Debug selection applies in Visual Micro.


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carlgrants Newbies Offline Posts: 1 Joined: Aug 25^th, 2026	Re: About "ESP32S3-USB-Debugging" Reply #2 - Aug 25^th, 2026 at 9:32am	Print Post
	Simon@Visual Micro wrote on Nov 25^th, 2024 at 12:47pm: 1) Documentation page updated and the link referred to the below page, where an external probe is used to connect to the JTAG pins: https://www.visualmicro.com/page/ESP32S3-JTAG-Debugging.aspx 2) This was following the Espressif documentation: https://docs.espressif.com/projects/esp-idf/en/stable/esp32s3/api-guides/jtag-de... Quote: The quickest and most convenient way to start with JTAG debugging is through a USB cable connected to the D+/D- USB pins of ESP32-S3. No need for an external JTAG adapter and extra wiring/cable to connect JTAG to ESP32-S3. 3) On that board the second USB port provides USB-JTAG which is not always available on every variant of the board. This is why we show the USB lead connected to the board which would provide the same USB-JTAG access on any board (or even just the module itself). The on-board USB port is wired to the same IO pins on their schematic (which have the zener diodes for the voltage limiting): https://dl.espressif.com/dl/schematics/SCH_ESP32-S3-DevKitC-1_V1.1_20221130.pdf The USB-UART Debugging will work the same just connected via the "USB" port on the board, the driver needs installing for the same interface, and the same Debug selection applies in Visual Micro. Thanks for your answer. This is what I am looking for


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