Development board applied to installation and debugging practical training of Internet of Things

The invention discloses a development board applied to installation and debugging practical training of the Internet of Things, which comprises a circuit substrate, two rows of Android interfaces are installed on the top surface of the circuit substrate and close to the edges of the two sides, and a reset key is installed on the top surface of the circuit substrate and located behind one row of Android interfaces. A USB-to-serial port is installed at the position, close to the rear end and located on one side of the reset key, of the top face of the circuit substrate, a 9-volt power input interface is installed at the position, close to the rear end and located on one side of the USB-to-serial port, of the top face of the circuit substrate, and a serial port switching assembly and a main control chip are installed at the position, between the two rows of Android interfaces, of the top face of the circuit substrate. According to the invention, functions of Wi-Fi, Bluetooth BT, Zigbee, Lora, LTE and NB are supp