Which microcontroller is suitable for IoT?

The most suitable development board to start with is Arduino and other microcontrollers supporting Arduino software for Programming.

There are other development boards for IOT projects.

Here is a list of development boards that are ideal for your first IoT project.

• ESP32(programmed with Arduino IDE)
• C.H.I.P. CHIP is the new kid on the block. …
• Mediatek Linkit One. Based on the smallest SOC, the Linkit One board comes with compatible Arduino pinout features. …
• Particle Photon. …
• Tessel. …
• Adafruit Flora. …
• LightBlue Bean. …
• Udoo Neo. …
• Intel Edison.
• Rasberry PI

for better understanding, you can watch this video