The Arduino TIAN unleashes the power of a small computer running Linux connected to a 32-bit microcontroller. The Arduino TIAN is based on the Atheros AR9342 connected to an Atmel Cortex® M0+ 32-bit microcontroller plus all connectivity: Ethernet, Wi-Fi, Bluetooth.
The Arduino Uno WiFi board is the Arduino Uno with integrated WiFi. For beginner and advanced users alike. The Arduino UNO WiFi board is based on the ATmega328 and it has an integrated ESP8266 WiFi Module. If you are starting out with Arduino, or starting with IoT, this is the board to get.
The Arduino Industrial 101 is a small form-factor YUN designed for product integration. The Arduino Industrial 101 is a break-out board for the Arduino 101 LGA module. Just like the YUN, it integrates an ATmega32U4 and an Atheros AR9331 with WiFi and Linino OS.
The Raspberry Pi 3 Model B is based on the characteristics of its predecessors, but there are two giant upgrades:
The first is a next generation Quad Core Broadcom BCM2837 64-bit ARMv8 processor, making the processor speed increase from 900 MHz on the Pi 2 to up to 1.2GHz on the Pi 3, the second giant upgrade (and this is the one we’re personally most excited about) is the addition of a BCM43143 WiFi chip BUILT-IN to your Raspberry Pi. No more pesky WiFi adapters - this Pi is WiFi ready. There’s also Bluetooth Low Energy (BLE) on board making the Pi an excellent IoT solution (BLE support is still in the works, software-wise)
If you want your Arduino to transmit data with other device or control PWM, I/O pin, serial communication of the Arduino by PC or phone client. Trust me, you definitely don't want to miss it- our Elecrow ESPduino! It will help you a lot and save your time on the connection. It combines a Arduino UNO with a serial WiFi and can be apply on lots of project of IOT, such as Smart Home, Smart robot, Security system. The same size with more powerful function, this two in one board will give you surprise!