LOLIN32 Lite ESP32 MicroPython, Battery Charger

ESP32-based WEMOS Lolin32 Lite ESP32 MicroPython compatible WiFi enabled Development Board. All you need to program it is a USB or serial (RX/TX) connection to the host (computer) and a terminal program. Programming is a lot simpler than Arduino (based on C) and can be done without the need for a special development environment (like Arduino IDE or AVR Studio).

Specifications:
Power Supply: 2.2V to 3.6V
Logic Level: 3.3V
Processors:
- Xtensa 32-bit LX6 core, operating at 160 or 240 MHz and performing at up to 600 DMIPS
- Ultra-low power (ULP) co-processor
Memory:
- 520kB SRAM
- 4MB Flash
Wireless connectivity:
- WiFi: 802.11 b/g/n
- Bluetooth: v4.2 BR/EDR and BLE Peripheral interfaces*:
- 12-bit SAR ADC up to 18 channels
- 2 8-bit DACs
- 10 touch sensors (capacitive sensing GPIOs)
- Temperature sensor
- 4 SPI
- 2 IS interfaces
- 2 IC interfaces
- 3 UART
- SD/SDIO/CE-ATA/MMC/eMMC host controller
- SDIO/SPI slave controller
- Ethernet MAC interface with dedicated DMA and IEEE 1588 Precision Time Protocol support
- CAN bus 2.0
- Infrared remote controller (TX/RX, up to 8 channels)
- Motor PWM
- LED PWM (up to 16 channels)
- Hall effect sensor
- Ultra-low power analog pre-amplifier
Security:
- IEEE 802.11 standard security features all supported, including WFA, WPA/WPA2 and WAPI
- Secure boot
- Flash encryption
- 1024-bit OTP, up to 768-bit for customers
- Cryptographic hardware acceleration: AES, SHA-2, RSA, elliptic curve cryptography (ECC), random number generator (RNG)
Power management:
- Internal low-dropout regulator
- Individual power domain for RTC
- 5uA deep sleep current
- Wake up from GPIO interrupt, timer, ADC measurements, capacitive touch sensor interrupt

* - not all of the interface pins of the ESP32 MicroPython module are accessible through the development board
* - this is a 3.3V device, make sure you use level shifter to connect I/O ports to higher logic level like 5V