A WiFi and Bluetooth board based on ESP32. It is an affordable Internet-of-Things board that works across all Arduino based sensor and modules.
It has 4 MiB flash memory onboard, a USB-serial adapter (cp210x), MicroSD Card Slot, support SD and SPI mode and a LiPo battery charger and connector. All the relevant pins are broken out and well-labeled, especially on the bottom. It has a nice central reset button, and even a single user LED for your blinking pleasure.
WEMOS LOLIN32 VREV1 - wifi & bluetooth board based ESP-32 4MB FLASH Features.
At its heart, there's a dual-core or single-core Tensilica Xtensa LX6 microprocessor with a clock rate of up to 240 MHz. ESP32 is highly integrated with built-in antenna switches, RF balun, power amplifier, low-noise receive amplifier, filters, and power management modules. Engineered for mobile devices, wearable electronics, and IoT applications, ESP32 achieves ultra-low power consumption through power saving features including fine resolution clock gating, multiple power modes, and dynamic power scaling.
Espressif official ESP32-WROVER module
Lastest ESP32 Version: REV1
Lithium battery interface, 500mA Max charging current
MicroSD Card Slot, support SD and SPI mode
Both USB and VIN(5V input) have 1A fuse
- Battery Connector: PH-2 2.0mm
All of the IO pins run at 3.3V.
Microcontroller ESP-32 Board Power Supply (USB/VIN) 5V Supported Batteries Lipo Battery 3.7V Operating Voltage 3.3V Digital I/O Pins 22 Analog Input Pins 6 (VP, VN, 32, 33, 34, 35) Analog Output Pins 2 (25, 26) LED_BUILTIN 5 Clock Speed(Max) 240Mhz Flash 4M bytes PSRAM 4M bytes Length 65mm Width 25.4mm Weight 7.5g