MIT App Inventor, which lets you develop applications for Android devices using a web browser and either a connected phone or emulator. You can also use the Site to store your work and keep track ...

App Inventor — a Google cast-out that is now maintained by MIT — is a graphical tool that unlocks the power of an Android handset to those with the most basic of programming understanding.

This Bluetooth module ties directly into the Tx and Rx lines of the Arduino so a wireless serial connection between an Android device can be established.

Hardware: NodeMCU (ESP8266) for Wi-Fi control, Arduino for Bluetooth control, BLDC motor, ESC (Electronic Speed Controller), HC-05 Bluetooth module. Software: MIT App Inventor, Arduino IDE for NodeMCU ...