Project Hub /Communication Systems/LoRa & Long-Range Telemetry/ESP32 WiPhone

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ESP32

₹5,000 – ₹15,000

1 – 2 Days

Partial Kit

ESP32 WiPhone

The WiPhone is an open-source, hackable, modular mobile IP phone powered by the ESP32 that enables free calls over Wi-Fi without a cellular network.

Originally published on Hackaday.io

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
MB102 Adjustable Breadboard Power Supply Module (3.3V & 5V) for Arduino & Raspberry Pi Rs. 139.00
2-Slot 18650 Holder with Protective Cover and On/Off Switch – Case Rs. 109.00
Microphone module - Analog Sound Sensor Module for Arduino Rs. 63.00
400 Points Mini Solderless Prototype PCB Breadboard High Quality Rs. 89.00
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: LCD (generic / unspecified)
Battery (generic / unspecified)
Speaker / Audio Amplifier
LoRa Module
soft reset circuit

Browse all components

How It Works

The ESP32 WiPhone is a modular, open-source IP phone built around the ESP32 processor, which manages core processing, Wi-Fi connectivity, and overall system coordination. The device integrates a power supply and battery architecture to deliver portable operation, supported by a soft reset circuit for reliable hardware recovery. For user interaction, the system features a 320x240 (2.4") LCD screen for visual output, a physical keypad of buttons for user input, and an onboard microphone and ear speaker to handle audio capture and playback. The software stack runs on the Arduino IDE using custom ESP32 firmware configured to execute a SIP/VoIP application, allowing the device to transmit and receive voice data packets wirelessly over a local Wi-Fi network. Additionally, the architecture accommodates optional daughterboards such as LoRa or 4G LTE modules, which expand communication pathways beyond standard wireless LANs to include decentralized radio frequencies or cellular networks.

Why Build This

Develop and deploy custom VoIP and SIP communication firmware tailored to specialized IoT communication hardware.

Integrate power management systems, audio transducers, and graphical displays into a cohesive, portable embedded computing platform.

Design and assemble a modular wireless device capable of supporting alternative communication protocols like LoRa or cellular daughterboards.

Real-World Application

Can be used as a secure backup phone, a child-friendly communication device without smartphone distractions, an elderly-friendly simplified phone, or an open platform for custom IoT remote controls and LoRa text messaging.

Skills You'll Learn

Embedded firmware development

VoIP and SIP protocol integration

audio signal routing

power supply management

modular hardware interfacing

Safety Precautions

No specific precautions noted for this build — always follow general electronics safety practices.

Technology Tags

ESP32

ARDUINO

VOIP

SIP

WIFI

LORA

OPEN SOURCE

HARDWARE

MOBILE PHONE

Frequently Asked Questions

Can the WiPhone make calls without a traditional cellular network?

Yes, the WiPhone operates as a VoIP device using a SIP/VoIP application over Wi-Fi, meaning it connects through wireless networks rather than standard cellular towers.

What software environment is required to program the WiPhone?

The device is programmed using the Arduino IDE with custom ESP32 firmware built specifically for the WiPhone architecture.

Can I add alternative communication hardware to the device?

Yes, the system supports optional daughterboards including LoRa and 4G LTE modules for extended connectivity options.

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.

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