The Best-Value Arduino WiFi Module

1. ESP8266 Wifi Bee (Arduino Compatible)

Price: $5.9

Wifi Bee-ESP8266 is a Serial-to-WIFI module using XBEE design in a compact size, compatible with XBEE slot, applicable to a variety of 3.3V single-chip system. It can be used for Arduino, wireless data transfer, remote control. On-board switch can be used to easily select the Startup module or Upgrade firmware.

ESP8266 arduino module has a powerful on-chip processing and storage capacity, built-in 32-bit processor, built-in Lwip protocol stack. Support AP+STA mode co-exist. And you could configure various parameters via AT commands.

Note: In order to configure this module, you will need an adapter or Xbee shield that lets you communicate with the module, before you can plug it and use on other modules. Compatible device: Xbee USB adapter (FTDI)

Read more about the ESP8266 Wifi Bee (Arduino Compatible). 

2. ESP32 WiFi & Bluetooth Dual-Core MCU Module

Price:$6.49

The ESP32 WiFi and Bluetooth chip is the latest generation of Espressif products. It has a dual-core 32-bit MCU, which integrates WiFi HT40 and Bluetooth/BLE 4.2 technology inside.

Compared to the arduino ESP8266 (the previous generation), the ESP32 has a significant performance improvement. It is equipped with a high-performance dual-core Tensilica LX6 MCU. One core handles high speed connection and the other for standalone application development. The dual-core MCU has a 240 MHz frequency and a computing power of 600 DMIPS.

In addition, it supports Wi-Fi HT40, Classic Bluetooth/BLE 4.2, and more GPIO resources.

Engineered for mobile devices, wearable electronics and Internet of Things (IoT) applications, the ESP32 achieves ultra-low power consumption with a combination of several proprietary software applications. The state-of-the-art power saving features include fine resolution clock gating, power modes, and dynamic power scaling.

Read more about the ESP32 WiFi & Bluetooth Dual-Core MCU Module

3. WT8266-S1 WiFi Module Based on ESP8266

Price: $6.9

WT8266-S1 Wi-Fi module is a low consumption, high performance embedded Wi-Fi network control module designed by Wireless-Tag. It can meet the IoT application requirements in smart power grids, building automation, security and protection, smart home, remote health care etc. 

The module's core processor arduino ESP8266 integrates an enhanced version of Tensilica's L106 Diamond series 32-bit processor with smaller package size and 16 bit compact mode, main frequency support 80 MHz and 160 MHz, support RTOS, integrated Wi-Fi MAC / BB / RF / PA / LNA, on-board PCB antenna.  The ESP8266 WiFi Module is a self contained SOC with integrated TCP/IP protocol stack that can give any microcontroller access to your WiFi network.

The module supports standard IEEE802.11 b / g / n protocol, a complete TCP / IP protocol stack. Users can use the module to add networking capabilities for existing equipment , also can build a separate network.

Read more about the WT8266-S1 WiFi Module Based on ESP8266