SparkFun Thing Plus – ESP32-S2 WROOM

Features

SparkFun Thing Plus – ESP32-S2 WROOM Features

• ESP32-S2 Module
  • 21 Available GPIO
    • 16x 12-bit ADC Channels
    • 2x 8-bit DAC
    • 14x Capacitive Touch Sensing
    • 4x SPI (only one is configured by default in the Arduino IDE)
    • 1x I²S
    • 2x I²C (only one is configured by default in the Arduino IDE)
    • 2x UART (only two are configured by default in the Arduino IDE, one UART is used for bootloading/debug)
    • 8x PWM Channels
• Thing Plus (or Feather) Form-Factor:
  • Dimensions: 2.55″ x 0.9″
  • Two Mounting Holes:
    • 4-40 screw compatible
  • 28 PTH Pins
  • USB-C Connector
  • 2-pin JST Connector for a LiPo Battery (not included)
  • 4-pin JST Qwiic Connector
• LEDs:
  • CHG – Yellow battery charging indicator
  • 13 – Blue status/test LED (GPIO 18)
• Buttons:
  • 0
  • Reset
• JTAG/SWD PTH Pins

ESP32-S2 WROOM General Features:

• Xtensa® Single-Core 32-bit LX7 Microprocessor (up to 240MHz)
  • RISC-V ULP Coprocessor
  • 128KB ROM and 320KB SRAM
  • 4MB of Embedded SPI Flash Storage
• Cryptographic Hardware Accelerators
  • AES, ECB/CBC/OFB/CFB/CTR, GCM, SHA, RSA, and ECC (Digital Signature)
• Physical Security Features
  • Transparent external flash and RAM encryption (AES-XTS)
  • Secure Boot feature ensures only signed firmware (with RSA-PSS signature) is booted
  • HMAC and Digital Signature modules use software inaccessible keys to generate SHA-MAC and MAC signatures
• Integrated 802.11 b/g/n WiFi 2.4GHz Transceiver (up to 150Mbps)
• Integrated Temperature Sensor (-20°C to 110°C)
• Operating Voltage: 3.0 to 3.6V
  • WiFi: 310mA (peak)
  • Light-Sleep: 550µA
  • Deep-Sleep: 20-235µA

With the ESP32-S2’s IoT and connectivity based application focus, this board provides a robust option for connected projects and applications.

All of that can sound a little daunting, but we assure you that the ESP32-S2 Thing Plus is anything but! SparkFun’s Thing Plus footprint only adds to the board’s feature set with the LiPo charging & power circuit making it perfect for home automation or wearable tasks. Possibly the biggest change for the S2 is the ULP (RISC-V) Co-processor. This allows you even more options to balance performance with power consumption over the original ESP32.

Additional new features of the ESP32-S2 include dedicated output pins for, DVP Camera Interface, LCD Interface, and integrated temp sensor. If your project needs even more peripherals, we have included a Qwiic connector on board for easy integration into any of SparkFuns Qwiic ecosystem equipped sensors and accessories. You will also find that this Thing Plus utilizes a USB-C connector instead of the microB USB found on its predecessor.

Keep in mind that while the ESP32-S2 does include an Integrated 802.11 b/g/n WiFi Transceiver allowing for speeds up to 150Mbps, it lacks the Bluetooth^® capabilities of the original ESP32 module. Additionally, the SRAM & ROM have been reduced. However, the support for larger external storage should easily be able to compensate for this.

Resources

• Schematic
• Eagle Files
• Board Dimensions
• Graphical Datasheet
• Hookup Guide
• Hardware Component Information:
  • ESP32-S2 Datasheet
  • ESP32-S2 WROOM Module Datasheet
  • ESP32-S2 Hardware Design Guidelines
• Espressif’s ESP32 Arduino Core * .json file needed for Epressif’s ESP32 Arduino Core:
  https://raw.githubusercontent.com/espressif/arduino-esp32/gh-pages/package_esp32_index.json
• Qwiic Info Page
• GitHub Hardware Repository
• Compare Thing Plus Boards