Table of Contents

• About the Project
  • Built With
• Getting Started
  • Prerequisites
  • Installation
• License

About The Project

This is a small ultrasonic sensor created during MakeZürich for the #BicycleParking challenge. The goal is to detect if a bicycle parking spot is occupied using an ultrasonic distance sensor.

Built With

The built using TTGO Lora32 board and a HC-SR04 sensor. PlatformIO is us used to develop and flash the firmeware for the board and data is transmitted to The Things Network

Getting Started

Prerequisites

• Install PlatformIO
• Create a The Things Network (TTN) Account https://account.thethingsnetwork.org/

Installation

1. Create a TTN Application
2. Register a device
3. Use ABP authentification method and replace the needed values in main.cpp
4. Create a decoder in TTN

function Decoder(bytes, port) {
  var decoded = {};
  decoded.occupied = !!bytes[0]
  decoded.distance = bytes[1]
  decoded.rack = bytes[2];
  return decoded;
}

5. Connect the HC-SR04 sensor to the TTGO board 5V-VCC,GND-GND,23-TRIG,19-ECHO
6. Flash Firmeware

License

Distributed under the MIT License. See LICENSE for more information.