> **Source:** Core Electronics is an Australian maker-electronics retailer and manufacturer based in Newcastle, NSW, run by a team of makers and educators. We design and manufacture our own product lines (PiicoDev, CE originals) and are official retailers for iconic maker and industrial brands including Raspberry Pi, Arduino, Adafruit, SparkFun and DFRobot. Orders ship Australia-wide from our Newcastle warehouse. Prices are in AUD and include GST. Pricing, stock and dispatch on this page are generated from the store's live catalog. Full machine-readable index: https://core-electronics.com.au/llms.txt # ESP32-S2 WROOM Module with PCB Antenna - 4 MB flash and no PSRAM - 4MB Flash **Type:** Product page · **SKU:** ADA4919 · **Brand:** [Adafruit](https://core-electronics.com.au/brands/adafruit-australia) **Page:** https://core-electronics.com.au/esp32-s2-wroom-module-with-pcb-antenna-4-mb-flash-and-no-psram-4mb-flash.html ([markdown](https://core-electronics.com.au/esp32-s2-wroom-module-with-pcb-antenna-4-mb-flash-and-no-psram-4mb-flash.html.md)) The ESP8266 started a small revolution by bringing WiFi to a small and cheap package that also had enough processing power and enough pins to get small things done. Then the ESP32 came out with tons of pins, Bluetooth support, and dual 240 MHz cores. Now get ready to take your IoT designs to the next level with the ESP32-S2-WROOM WiFi Module! ## Pricing - **Price:** $5.80 (inc GST) — $5.27 AUD, exc GST - **Quantity discounts:** 10+ $5.12 (exc GST) · 50+ $5.01 (exc GST) ## Availability & dispatch - Out of stock — the product page offers email notification when it returns. ## How to buy - **Build a cart:** compose `https://core-electronics.com.au/cart/link?items=ADA4919:1` (comma-separated SKU:qty pairs) and share the link. Opening it shows a confirmation page with live pricing and stock before anything is added to the cart. - **Verify the cart first:** fetch `https://core-electronics.com.au/cart/link/ADA4919:1.md` for live line prices (inc & exc GST, quantity discounts applied), stock and dispatch estimates, and totals. Append `/to/{AU-postcode}` (or `/to/{country-code}:{postcode}`) before `.md` for delivery options and prices to that destination. Unknown, retired, or out-of-stock SKUs are flagged. (Query form `cart/link.md?items=...` also works but some robots parsers refuse query strings here.) - **Checkout** is completed on-site and includes a captcha at the payment step. Share the cart link; checkout takes it from there. - **Search the catalogue:** `https://core-electronics.com.au/search/{query}.md` (URL-encode the query; pages 2-3 at `search/{query}/{page}.md`; `search.md?q=` also works) - **Payment methods, purchase orders, policies and contact details:** https://core-electronics.com.au/llms.txt ## Description The ESP8266 started a small revolution by bringing WiFi to a small and cheap package that also had enough processing power and enough pins to get small things done. Then the ESP32 came out with tons of pins, Bluetooth support, and dual 240 MHz cores. Now get ready to take your IoT designs to the next level with the **ESP32-S2-WROOM WiFi Module!** The ESP32-S2 is a highly-integrated, low-power, 2.4 GHz Wi-Fi System-on-Chip (SoC) solution that now has **built-in native USB** as well as some other interesting new technologies like Time of Flight distance measurements. With its state-of-the-art power and RF performance, this SoC is an ideal choice for a wide variety of application scenarios relating to the [Internet of Things (IoT)](https://core-electronics.com.au/catalogsearch/result/?order=bestsellers&q=iot), [wearable electronics](https://core-electronics.com.au/#), and smart homes. **Please note** this is a single-core 240 MHz chip so it won't be as fast as ESP32's with dual-core. Also, there is no Bluetooth support. However, Adafruit are super excited about the ESP32-S2's native USB which unlocks a lot of capabilities for advanced interfacing! This WROOM module comes with 4 MB flash and *does not contain any PSRAM*. This version has a built-in antenna, if you need an external antenna [Adafruit have the WROVER (PSRAM) version with a uFL connector version which can be used with an external antenna](https://core-electronics.com.au/esp32-s2-wrover-i-module-with-ufl-4-mb-flash-and-2-mb-psram.html). **For advanced users only! This product is just the module - which can be difficult to use.** You'll need to solder it onto a board with supporting circuitry. This module is for developers at this time. **Please note** this product is for people who are comfortable compiling via the ESP IDF toolchain. There are the *beginnings* of an [Arduino IDE setup](https://github.com/espressif/arduino-esp32/tree/esp32s2) and [a CircuitPython port](https://github.com/adafruit/circuitpython/tree/main/ports/esp32s2). Adafruit are providing these for the community of advanced hackers, coders, and makers who are willing to help make demos, projects, and tutorials for the ESP32-S2! **Specifications** MCU: - ESP32-S2 embedded, Xtensa® single-core 32-bit - LX7 microprocessor, up to 240 MHz - 128 KB ROM - 320 KB SRAM - 16 KB SRAM in RTC WiFi: - 802.11 b/g/n - Bit rate: 802.11n up to 150 Mbps - A-MPDU and A-MSDU aggregation - 0.4 µs guard interval support - Center frequency range of operating channel: 2412 ~ 2484 MHz Hardware: - Interfaces: GPIO, SPI, LCD, UART, I2C, I2S, Camera interface, IR, pulse counter, LED PWM, USB - OTG 1.1, ADC, DAC, touch sensor, temperature sensor - 40 MHz crystal oscillator - 4 MB SPI flash - Operating voltage/Power supply: 3.0 ~ 3.6 V - Operating temperature range: –40 ~ 85 °C - Dimensions: (18 × 31 × 3.3) mm Certification: - Green certification: RoHS/REACH - RF certification: FCC/CE-RED/SRRC Test: - HTOL/HTSL/uHAST/TCT/ESD **Resources** - Huuuuge amount of information on http://www.esp32.com/ community forum! - Don't forget to visit esp32.com for the latest and greatest in ESP32 news, software and gossip! - Module Datasheet ## Images - [Product image 1](https://core-electronics.com.au/media/catalog/product/4/9/4919-01.jpg)