Project Hub /Healthcare Biomedical & Assistive/Assistive & Prosthetic Tech/Bluetooth & HC-12 1KM Range Based Patient Assistant Device

Intermediate

ARDUINO

₹1,500 – ₹5,000

3 – 6 Hours

Partial Kit

Bluetooth & HC-12 1KM Range Based Patient Assistant Device

A wearable patient assistant device that uses HC-12 wireless transceivers and Bluetooth to provide long-range (up to 1km) emergency notifications and motion tracking for elderly or medical patients.

Originally published on ElectronicsForU

View original tutorial

Parts You'll Need

This project is sourced from another site, not written by us — this list is our best match of their components against what we stock, not a verified bill of materials. Always check the original blog (linked above) for the actual parts list before buying.

ESP32 WiFi+Bluetooth CP2102 Development Board Rs. 520.00
MPU6050 - Triple Axis Accelerometer + Gyroscope Module Rs. 438.00
2-Slot 18650 Holder with Protective Cover and On/Off Switch – Case Rs. 109.00
Piezo Buzzer (Big) 6-12V Rs. 45.00
400 Points Mini Solderless Prototype PCB Breadboard High Quality Rs. 89.00
MB102 Adjustable Breadboard Power Supply Module (3.3V & 5V) for Arduino & Raspberry Pi Rs. 139.00
Jumper Wire 10 Pin Male To Male 20cm Rs. 45.00
Jumper Wire 10 Pin Male To Female 20cm Rs. 45.00

Selected: Rs. 0.00

We don't carry yet: Battery (generic / unspecified)
Arduino Leonardo / Micro
HC-12 Wireless Transceiver Module

Browse all components

How It Works

The Bluetooth & HC-12 1KM Range Based Patient Assistant Device operates as a wearable monitoring and emergency alert system powered by an Arduino Pro Micro. At its core, the system utilizes an MPU6050 sensor to continuously track motion and orientation, which is crucial for detecting falls or unusual inactivity in elderly or medical patients. If the patient experiences an emergency, they can press the integrated emergency button, triggering the microcontroller to send an immediate alert. Communication is handled through two distinct wireless channels: an HC-05 Bluetooth module allows for short-range local pairing with smartphones or nearby diagnostic interfaces, while an HC-12 Wireless Transceiver Module provides long-range telemetry capable of transmitting signals up to 1 kilometer away to a central monitoring station. Upon receiving an emergency trigger or a fall-detection flag from the motion sensor, the system activates a local buzzer or vibration motor to provide immediate feedback to the wearer, while simultaneously broadcasting the wireless alert package across the designated frequency channel.

Why Build This

Design a reliable, long-range wearable telemetry and emergency notification device suitable for healthcare facilities and home care environments.

Integrate multiple wireless communication protocols (Bluetooth and long-range UART transceivers) into a single microcontroller architecture.

Implement motion-tracking algorithms using inertial measurement sensors to automatically detect patient falls or distress conditions.

Real-World Application

Elderly care and patient monitoring in homes, hospitals, or care facilities where long-range wireless alerts are required.

Skills You'll Learn

I2C sensor communication

UART serial configuration

wireless RF transceiver programming

Bluetooth device pairing

digital input handling for emergency triggers

actuator control for buzzers and vibration motors

Safety Precautions

Ensure correct battery polarity connections to prevent damage to the microcontroller and sensors.

Technology Tags

BLUETOOTH

HC-12

HC-05

MPU6050

WIRELESS COMMUNICATION

WEARABLE TECHNOLOGY

ARDUINO

Frequently Asked Questions

What is the difference between the HC-05 and the HC-12 modules in this project?

The HC-05 is a standard Bluetooth module used for short-range communication with devices like smartphones, whereas the HC-12 is a long-range radio frequency transceiver capable of transmitting data up to 1 kilometer to a base station.

Can the system detect falls automatically without pressing the emergency button?

Yes, the MPU6050 sensor tracks acceleration and orientation changes, allowing the microcontroller to monitor for sudden impacts or abnormal body orientations indicative of a fall.

What power supply is required for this wearable device?

The system operates on a portable battery supplying 3 to 5 volts, which must be connected with correct polarity to protect the sensitive electronics and microcontroller.

Gallery

This page is part of Kitkraft's Project Hub — a curated collection of electronics & robotics projects gathered from the maker community to help students and hobbyists discover and learn to build. Kitkraft does not claim authorship of the original project, and makes no representation as to the accuracy, completeness or safety of third-party source material. The summary and "How It Works" explanation above are AI-generated, rewritten with reference to the original tutorial — not a reproduction of it. Full credit and a direct link to the original source are provided above. If you're the original creator and have a concern about how your work is represented here, please contact us and we'll address it promptly.

Kitkraft Project Hub — curated from the maker community, credited at the source.

PRJ-00448