moo10052002 / sonicbot

SonicBot

Use the ESP-12E WiFi module and the touch screen of your smartphone to control a robot

Components used in this in this project:

• ESP-12E on NodeMCU 1.0
• H bridge L298N
• 2x DC motors
• HC-SR04 ultrasonic sensor

Arduino IDE settings:

• Add ESP boards via Preferences / Settings and add the following url into the Additional Board Manager URLs: http://arduino.esp8266.com/stable/package_esp8266com_index.json
• Add ESPAsyncWebServer library: https://github.com/me-no-dev/ESPAsyncWebServer
• Add ESPAsyncTCP library: https://github.com/me-no-dev/ESPAsyncTCP
• Install the Arduino ESP8266 filesystem uploader to make use of SPIFFS filesystem (https://github.com/esp8266/arduino-esp8266fs-plugin)
  • This plugin allows you to upload html files directly to the ESP
  • All files stored in the data subfolder of your Arduino sketch path will be uploaded
• Board Settings:
  • Board: "NodeMCU 1.0 (ESP-12E Module)"
  • Flash Size: "4M (1M SPIFFS)"

Wiring

Wiring for L298N H bridge

L298N	ESP2866
enA	D2 (GPIO4)
in1	D3 (GPIO0)
in2	D4 (GPIO2)
in3	D0 (GPIO16)
in4	D8 (GPIO15)
enB	D1 (GPIO5)

Wiring for HC-SR04 ultrasonic sensor

Attention: If the supply volatage of the ultrasonic sensor is 5V, you need to step down the 5V echo signal to 3.3V.

HC-SR04	ESP2866
Trig	D5 (GPI14)
Echo	D6 (GPIO12)

Usage

• Upload the Arduino Sketch File with the recommended board settings.
• Upload the html file by cklicking on "Tools" --> "ESP8266 Sketch Data Upload"
• Connect to the Wifi network created by the ESP
• Open your webbrowser and navigate to 192.168.4.1
• On Android devices: You may have to disable mobile data usage in order to connect to the local IP-Address