ESP-32-S3 Mini Schematic Design
Thought for 32 sec
Yeah — this is a solid start, and I can read the main intent from the screenshot.
What I see in your schematic image:
- ESP32-S3-MINI-1 module in the center
- USB-C connector
- 3.3 V regulator
- BOOT / RESET buttons
- power LED
- buzzer
- a servo output section
- a fingerprint connector
- and a sensor block at bottom-right that looks like an IMU/sensor interface
Good:
- You’ve already separated the design into functional blocks, which makes it much easier to debug and build from a screenshot review perspective
- The core support pieces for the ESP32 are there: USB, regulator, boot/reset, LED
- The schematic is readable enough to reason about at a high level
Main concerns from the screenshot
-
I do not think that bottom-right sensor is the BNO055
- The label in the image looks like something closer to LSM6DSOXTR, not BNO055.
- So if your goal is specifically ESP32 + BNO055, this screenshot may be using a different IMU.
-
I can’t verify exact pin correctness from the screenshot alone
- For image reviews, the right approach is to identify topology and obvious issues, but not pretend unreadable pin text is confirmed
- So I can comment on structure, but not guarantee every net is right from this image.
-
USB-C implementation needs a closer check
- I can see 5.1 kΩ CC resistors, which is a good sign for a USB device/power sink style connection.
- But the USB D+ / D- routing to the ESP32-S3 needs to be checked carefully, since the S3 supports native USB and those exact nets matter.
-
ESP32 enable / boot network should be verified
- You have buttons and a pull-up shown, which is directionally right.
- But the exact EN, GPIO0/BOOT, pull resistor values, and whether reset/boot are wired in the recommended way should be checked against the ESP32-S3-MINI-1 documentation, not guessed.
-
Sensor power / interface mode needs verification
- If this is meant to be BNO055, then the required power pins, I²C/UART mode pins, address/config pins, reset pins, and decoupling need to match the BNO055 datasheet.
- From the screenshot alone, I can’t confirm that.
- As a rough architecture: yes, this looks reasonable.
- As a finished “ESP32-S3 + BNO055” schematic: not yet verified, and possibly not actually using a BNO055.
- Confirm the IMU part number
- Verify ESP32-S3 USB pins
- Verify EN / BOOT wiring
- Verify regulator input/output caps
- Verify the sensor is powered from 3.3 V
- If it is BNO055, verify:
- SDA/SCL
- pull-ups
- reset/boot/config pins
- decoupling caps
If you want, I can do the next useful step in a very practical way:
- Option A: you send a clearer screenshot just of the ESP32 + USB + IMU area
- Option B: I give you a known-good ESP32-S3-MINI-1 ↔ BNO055 connection checklist
- Option C: I mark up this screenshot verbally and tell you exactly what looks right vs suspicious block by block
If you want the fastest path, pick C and I’ll go line-by-line through this image.
Do block-by-block review
Check USB and boot
Verify the IMU part
