ESP32-S2 Lolin Mini
Overview
ESP32-S2 is a highly integrated, low-power, single-core Wi-Fi Microcontroller SoC, designed to be secure and cost-effective, with a high performance and a rich set of IO capabilities. [1]
The features include the following:
RSA-3072-based secure boot
AES-XTS-256-based flash encryption
Protected private key and device secrets from software access
Cryptographic accelerators for enhanced performance
Protection against physical fault injection attacks
Various peripherals:
43x programmable GPIOs
14x configurable capacitive touch GPIOs
USB OTG
LCD interface
camera interface
SPI
I2S
UART
ADC
DAC
LED PWM with up to 8 channels
Hardware
Supported Features
The esp32s2_lolin_mini board supports the hardware features listed below.
- on-chip / on-board
- Feature integrated in the SoC / present on the board.
- 2 / 2
-
Number of instances that are enabled / disabled.
Click on the label to see the first instance of this feature in the board/SoC DTS files. -
vnd,foo -
Compatible string for the Devicetree binding matching the feature.
Click on the link to view the binding documentation.
esp32s2_lolin_mini/esp32s2 target
Type |
Location |
Description |
Compatible |
|---|---|---|---|
CPU |
on-chip |
Espressif Xtensa LX7 CPU1 |
|
ADC |
on-chip |
ESP32 ADC2 |
|
Bluetooth |
on-chip |
Bluetooth HCI for Espressif ESP321 |
|
CAN |
on-chip |
ESP32 Two-Wire Automotive Interface (TWAI)1 |
|
Clock control |
on-chip |
ESP32 RTC (Power & Clock Controller Module) Module1 |
|
Counter |
on-chip |
ESP32 Counter Driver based on RTC Main Timer1 |
|
on-chip |
ESP32 general-purpose timers4 |
||
DAC |
on-chip |
ESP32 Digital to Analog converter (DAC)1 |
|
Flash controller |
on-chip |
ESP32 flash controller1 |
|
GPIO & Headers |
on-chip |
ESP32 GPIO controller2 |
|
I2C |
on-chip |
ESP32 I2C2 |
|
Input |
on-chip |
ESP32 touch sensor input1 |
|
on-board |
Group of GPIO-bound input keys1 |
||
Interrupt controller |
on-chip |
ESP32 Interrupt controller1 |
|
LED |
on-board |
Group of GPIO-controlled LEDs1 |
|
Memory controller |
on-chip |
ESP32 pseudo-static RAM controller1 |
|
MTD |
on-chip |
Flash node1 |
|
on-chip |
Fixed partitions of a flash (or other non-volatile storage) memory1 |
||
Pin control |
on-chip |
ESP32 pin controller1 |
|
PWM |
on-chip |
ESP32 LED Control (LEDC)1 |
|
RNG |
on-chip |
ESP32 TRNG (True Random Number Generator)1 |
|
Sensors |
on-chip |
ESP32 Pulse Counter (PCNT)1 |
|
on-chip |
ESP32 temperature sensor1 |
||
Serial controller |
on-chip |
||
SPI |
on-chip |
ESP32 SPI2 |
|
Watchdog |
on-chip |
ESP32 XT Watchdog Timer1 |
|
on-chip |
|||
Wi-Fi |
on-chip |
ESP32 SoC Wi-Fi1 |
System requirements
Prerequisites
Espressif HAL requires WiFi and Bluetooth binary blobs in order work. Run the command below to retrieve those files.
west blobs fetch hal_espressif
Note
It is recommended running the command above after west update.
Building & Flashing
Build and flash applications as usual (see Building an Application and Run an Application for more details).
# From the root of the zephyr repository
west build -b esp32s2_lolin_mini samples/hello_world
The usual flash target will work with the esp32s2_lolin_mini board
configuration after putting the board into bootloader mode by holding the ‘0’
button then pressing ‘RST’ and releasing the ‘RST’ button.
Here is an example for the Hello World application.
# From the root of the zephyr repository
west build -b esp32s2_lolin_mini samples/hello_world
west flash
Open a serial port using e.g. screen
screen /dev/ttyUSB0 115200
After the board has been manually reset and booted, you should see the following message in the monitor:
***** Booting Zephyr OS vx.x.x-xxx-gxxxxxxxxxxxx *****
Hello World! esp32s2_lolin_mini