What's Metro shaped and has an ESP32-S2 WiFi module? What has a STEMMA QT connector for I2C devices, and a Lipoly charger circuit? What has your favorite Espressif WiFi microcontroller and lots of memory for your next IoT project? That's right - its the new Adafruit Metro ESP32-S2! With native USB and a load of PSRAM this board is perfect for use with CircuitPython or Arduino, to add low-cost WiFi while keeping shield-compatibility. 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), wearable electronics, and smart homes. Please note the Metro ESP32-S2 has 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, we are super excited about the ESP32-S2's native USB which unlocks a lot of capabilities for advanced interfacing! This WROVER module we are using on the Metro comes with 4 MB flash and 2 MB PSRAM. Revision History * As of 10th November, 2023 - We added a right-angle Boot0 button so it's easier to press. We also changed the battery monitor chip from using a resistor divider (which worked OK but did not have great voltage precision) to the MAX17048 dedicated LiPoly monitor. Features * ESP32-S2 240MHz Tensilica processor - the next generation of ESP32, now with native USB so it can act like a keyboard/mouse, MIDI device, disk drive, etc! * WROVER module has FCC/CE certification and comes with 4 MByte of Flash and 2 MByte of PSRAM - you can have huge data buffers * Lotsa power options - 6-12VDC barrel jack or USB type C or Lipoly battery * Built-in battery charging when powered over DC or USB * Precision battery monitoring via MAX17048 on I2C UNO-shape so shields can plug in * Reset and DFU (BOOT0) buttons to get into the ROM bootloader (which is a USB serial port so you don't need a separate cable!) * Serial debug pins (optional, for checking the hardware serial debug console) * JTAG pads for advanced debugging access. * On/Off switch * STEMMA QT connector for I2C devices * On/Charge/User LEDs + status NeoPixel * Works with Arduino or CircuitPython * 53.2mm x 72mm * Height (w/ barrel jack): 14.8mm * Weight: 22.5g Resources * Product Overview https://elecena.pl/product/22721808/adafruit-metro-esp32-s2 2023-03-07 https://elecena.pl/product/22721808/adafruit-metro-esp32-s2 2023-12-27 https://elecena.pl/product/22721808/adafruit-metro-esp32-s2 2024-09-19 https://elecena.pl/product/22721808/adafruit-metro-esp32-s2 2024-11-29 https://elecena.pl/product/22721808/adafruit-metro-esp32-s2 2024-11-30 https://elecena.pl/product/22721808/adafruit-metro-esp32-s2 2025-04-10 https://elecena.pl/product/22721808/adafruit-metro-esp32-s2 2025-09-27 https://elecena.pl/product/22721808/adafruit-metro-esp32-s2 2025-11-28 https://elecena.pl/product/22721808/adafruit-metro-esp32-s2 2025-11-29