Esp32wroom is a small-sized ESP32-based chip microcontrollers with integrated Wi-Fi & dual-mode Bluetooth.  Its application are Universal low power IoT sensor hub, Home automation, Universal low power IoT recorder, Baby monitor, Smart socket, Sensor network and many more. It has on- board PCB anteena with high level of integration and ultra low power management.

The NodeMCU Ch304 is an open source LoT platform which includes firmware based on ESP8266.It is an open source using Lua script language with WI-FI enabled. It uses many open source projects, such as lua-cjson and spiffs. . It comes with  CH340 chip  as Serial to USB interface. It is integrated with TCP / IP protocol stack.

The NodeMCU CP2102 is an open source LoT platform which includes firmware based on ESP8266.It is an open source using Lua script language with WI-FI enabled. It uses many open source projects, such as lua-cjson and spiffs. It has features like Plug and Play with USb-TTL , reset and flash button.

ESP8266 Wi-Fi module is   a complete and self-contained Wi-Fi networking solution serving as a Wi-Fi adapter, wireless internet access can be added to any microcontroller-based design with simple connectivity through UART interface or the CPU AHB bridge interface. It includes the antenna switch balun, power management converters. It can be used for Baby monitors, smart power plugs, mesh networks and many more.

Esp32 With 18650Battery Holder has 4 LEDs that show the battery status in real-time. It has a power button to start by clicking once. Navigation button changes (IO34, IO35, IO39)2A self-recovery fuse battery connection reverse protection.

he ESP32-C3 Zero Mini Development Board is a compact and powerful microcontroller board designed for IoT applications, smart home devices, and embedded systems. It features the ESP32-C3 chipset, which includes a 32-bit RISC-V single-core processor running at up to 160MHz, making it energy-efficient yet capable of handling various wireless and sensor-based tasks.

Features

• Low-power SoC equipped with RISC-V 32-bit single-core processor, up to 160MHz main frequency
• Supports 2.4GHz Wi-Fi (802.11 b/g/n) and Bluetooth® 5 (LE)
• 400KB of SRAM, 384KB ROM, and 4MB of onboard Flash memory
• Castellated module and onboard ceramic antenna, allows soldering directly to carrier boards
• Supports flexible clock, module power supply independent setting, and other controls to realize low power consumption in different scenarios
• Integrated with a USB serial port full-speed controller, 15 x GPIO pins allows flexible configuring pin functions
• 3 x SPI, 1 x I2C, 2 x UART, 1 x I2S, 2 x ADC, etc.

The ESP32-C3 Dual USB development board is a compact and versatile module based on the ESP32-C3 microcontroller, which features a RISC-V 32-bit single-core processor with a clock speed of up to 160 MHz. This board is equipped with two USB Type-C ports, enhancing flexibility in power supply, programming, and connectivity options.

Features:

• 2.4 GHz Wi-Fi: IEEE 802.11 b/g/n-compliant
• Bluetooth and Bluetooth LE: Bluetooth 5, Bluetooth mesh
• 4 MByte(32Mbit) SPI Flash
• 384 KByte ROM
• 400 KByte SRAM
• PCB Antenna
• Dual Type-C USB connectors
• Reset and User/Firmware buttons
• RGB WS2812 User LED
• Power LED

The ESP32-S3-WROOM-1-N16R8 is a Wi-Fi + Bluetooth 5 (LE) module powered by Espressif’s ESP32-S3 SoC (System on Chip). It features 16MB of Flash memory and 8MB of PSRAM, making it a high-performance module for IoT, AI, and edge computing applications.

Key Features

• ESP32-S3 SoC: Based on a dual-core Xtensa LX7 processor, optimized for AI and IoT applications.
• Wi-Fi & Bluetooth 5 (LE): Supports 2.4 GHz Wi-Fi 802.11 b/g/n and Bluetooth 5 Low Energy (LE) with long-range support.
• Memory:
  • 16MB Flash (for firmware and application storage)
  • 8MB PSRAM (for AI and ML applications, buffering, and complex operations)
• USB Support: Built-in USB OTG (On-The-Go) interface for direct USB connectivity.
• AI Acceleration: Supports vector instructions for AI and ML applications.
• Security:
  • Secure boot
  • Flash encryption
  • AES, RSA, SHA cryptographic hardware acceleration
• Low Power Consumption: Optimized for battery-powered applications.
• Rich GPIOs: Multiple GPIOs for PWM, ADC, SPI, UART, I2C, I2S, DAC, and other peripherals.
• Operating Voltage: 3.3V
• Operating Temperature: -40°C to 85°C