TinyMLOnTheEsp32s3-wroom < IoT_Course

Tags: view all tags

---+ !TinyML on the esp32s3-wroom
---++ Introduction

The esp32s3-wroom is a very cheap esp32s3 board with 8MB of octal PSRAM and an integrated [[https://www.uctronics.com/download/cam_module/OV2640DS.pdf][OV2640]] 2 !MPixel camera. Because of these features, it is particularly interesting for !TinyML work. There is a C driver for this camera as well as its !MicroPython language binding.

The module has 40 external piins of which many are used internally however.

<img alt="ESP32S3_pinout.png" height="704" src="%ATTACHURL%/ESP32S3_pinout.png" title="ESP32S3_pinout.png" width="1562" />

GPIO 1 and 3 are the serial Tx and Rx respectively. If you have a board with a USB connector, then these pins stay unused. In the other case, you must connect the board to your PC through these pins for serial communication and for flashing, using an USB to serial converter. When connecting GPIO-0 to ground and resetting the esp32-cam it enters into flash mode. For normal operation, this connection must be removed.

The esp32s3-wroom features a SD-card interface using GPIO 14,15,2,4,12,13. GPIO 4 is also used for the flashlight. These pins are available as regular inputs/outputs if the SD card is not used.
---++ Connecting the MPU6050 accelerometer and gyroscope

The MPU6050 accelerometer and gyroscope is used in the magic wand example.

Here is the connection table:
| *MPU6050* | *ESP32-CAM* |
| Vcc_In | 5V |
| GND | GND |
| SCL | GPIO 14 |
| SDA | GPIO 15 |
---++ Microphone connection

!I2S microphones are used in the Wake Word Detection example. Two different microphone breakout boards are available and can easily be connected to the esp32-cam (see WakeWordDetection)

For the esp32-cam the connections are given below:

| INMP441 | SPH0645 | ESP32-CAMG |
| GND | GND | GND |
| VDD | 3V | 3.3V |
| SD | DOUT | GPIO 14 |
| SCK | BCLK | GPIO 15 |
| WS | SEL | GPIO 2 |
| L/R | LRCL | GND |
 -- %USERSIG{UliRaich - 2022-09-23}%

---++ Comments

<br />%COMMENT%

Attachments

Topic attachments
I	Attachment	History	Action	Size	Date	Who	Comment
png	ESP32S3_pinout.png	r1	manage	351.4 K	2023-09-02 - 10:03	UliRaich
pdf	ESP32_CAM_V1.6.pdf	r1	manage	26.2 K	2022-09-23 - 17:40	UliRaich

Topic revision: r3 - 2023-09-02 - UliRaich