The Mega 2560 is a micro-controller board base on the CH340. It has 54 digital input/output pins (of which 15 can be used as PWM outputs), 16 analog inputs, 4 UARTs (hardware serial ports), a 16 MHz crystal oscillator, a USB connection, a power jack, an ICSP header, and a reset button. It contains everything need to support the micro-controller; simply connect it to a computer with a USB cable or power it with a AC-to-DC adapter or battery to get start. The Mega is compatible with most shields design for the Duemilanove or Diecimila. The Mega 2560 is an update to the Mega, which it replaces. The Mega2560 differs from all preceding boards in that it does not use the FTDI USB-to-serial driver chip. Instead, it features the CH340 programmed as a USB-to-serial converter. Revision 2 of the Mega2560 board has a resistor pulling the 8U2 HWB line to ground, making it easier to put into DFU mode.

SP32-CAM is a WIFI+ Bluetooth dual-mode development board that uses PCB on-board antennas and cores based on ESP32 chips. It can work independently as a minimum system.ESP integrates WiFi, traditional Bluetooth, and BLE Beacon, with 2 high-performance 32-bit LX6 CPUs, 7-stage pipeline architecture, main frequency adjustment range 80MHz to 240MHz, on-chip sensor, Hall sensor, temperature sensor, etc. Fully compliant with WiFi 802.11b/g/n/e/i and Bluetooth 4.2 standards, it can be used as a master mode to build an independent network controller, or as a slave to other hosts MCUs to add networking capabilities to existing devices.ESP32-CAM can be widely used in various IoT applications. It is suitable for home smart devices, industrial wireless control, wireless monitoring, QR wireless identification, wireless positioning system signals, and other IoT applications. It is an ideal solution for IoT applications. Features: Ultra-small 802.11b/g/n Wi-Fi + BT/BLE SoC module Low-power dual-core 32-bit CPU for application processors Up to 240MHz, up to 600 DMIPS Built-in 520 KB SRAM, external 4M PSRAM Supports interfaces such as UART/SPI/I2C/PWM/ADC/DAC Support OV2640 and OV7670 cameras with built-in flash Support for images WiFI upload Support TF card Support multiple sleep modes Embedded Lwip and FreeRTOS Support STA/AP/STA+AP working mode Support Smart Config/AirKiss One-click distribution network Support for serial local upgrade and remote firmware upgrade (FOTA) Support secondary development