ESP32-C3 BLE Sensor Tag Kit with ESP32 + DHT22
ESP32-C3 BLE Sensor Tag Kit: Build a Tiny Beacon That Broadcasts Temperature & Humidity to Your Phone
Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.
Ever wanted a pocket-sized device that silently reports temperature and humidity, viewable from your phone without tapping “pair” or connecting to Wi-Fi? This kit brings that idea to life. You’ll assemble a battery-powered ESP32-C3 Super Mini board with a DHT22 sensor and program it to broadcast real-time readings over Bluetooth Low Energy advertisements. Open any standard BLE scanner app and the data appears instantly — no sign‑ups, no cloud, no fuss.
What You'll Build
You’ll build a thumb‑sized wireless sensor tag that can be placed in a room, greenhouse, or study desk. Once powered from the included CR2032 holder, the tag will continuously advertise temperature and humidity values as plain‑text BLE payloads. A free app on Android or iOS captures these advertisements and displays them live, with a range of up to 10–15 metres indoors. The entire circuit fits on a mini breadboard, keeping the footprint tiny and portable.
What You'll Learn
- How to wire a DHT22 sensor to an ESP32-C3, including the necessary pull‑up resistor circuit
- How to program BLE advertising using Arduino IDE and the ESP32 BLE libraries
- How to structure code for low‑power operation so your beacon can run for days on a small coin cell
- How to decode and visualise raw advertisement data on a smartphone, turning bits into meaningful environmental readings
Kit Contents
| Component | Quantity |
|---|---|
| ESP32-C3 Super Mini | 1 |
| DHT22 | 1 |
| CR2032 Holder | 1 |
| 10kΩ Resistors | 5 |
| 170-pt Breadboard | 1 |
| M-M Wires | 10 |
| Micro USB Cable | 1 |
Why Buy This Kit Instead of Sourcing Parts Separately
| Factor | Sourcing Separately | Compoden Kit |
|---|---|---|
| Compatibility checks | You verify every part (e.g., DHT22 pull‑up logic voltage, BLE stack on ESP32-C3) | Pre-tested as a system |
| Build support | Forums and scattered tutorials | AI companion trained on this exact project |
| Time to first working build | Days of debugging | Hours, with step-by-step guidance |
| Shipping coordination | Multiple sellers, multiple delays | One shipment from Bengaluru in 3-5 days |
Who This Kit Is For
This kit is designed for young learners and hobbyists across India. CBSE Class 11–12 students can use it for IoT‑focused computer science or physics practicals. ATL Tinkering Labs will find it an engaging introduction to wireless sensor networks. It’s also a perfect weekend project for a parent and child to build together — no soldering, no dangerous voltages, and a quick win that shows real data on a phone screen within a couple of hours.
Built and Backed by Compoden
Every Compoden kit ships with an AI build companion trained on this exact project — accessible via a QR code on the box, with WhatsApp and email backup. We've spent 10 years building projects for makers, schools, and institutions across India. If a part fails because of a manufacturing defect, replace it free within 7 days.
What if I get stuck during the build?
Scan the QR code on the box to launch the AI build companion; it walks you through wiring, code upload, and troubleshooting. You can also message us on WhatsApp for human help during Indian business hours.
Will this work with both Android and iOS phones?
Yes. BLE advertisements are a universal standard supported by Bluetooth 4.0+ devices. Use free apps like nRF Connect (Android/iOS) or LightBlue (iOS) to see the sensor readings appear as advertiser data without any pairing.
How long does the battery last on a CR2032 cell?
With the power‑saving techniques covered in the AI companion (deep sleep between advertisements), you can expect weeks of continuous operation from a single coin cell. The code template we provide is optimised to minimise idle current.
Do I need any programming experience to complete this kit?
No prior experience is required. The AI companion guides you through installing Arduino IDE, adding ESP32 board support, and pasting the pre‑written sketch. The entire workflow is beginner‑friendly and takes about 30 minutes once the board is connected.
ESP32-C3 broadcasts DHT22 readings as BLE advertisement. Phone reads without pairing. Tiny sensor beacon.
What's in this kit
- ESP32-C3 Super Mini
- DHT22
- CR2032 Holder
- 10kΩ Resistors x5
- 170-pt Breadboard
- M-M Wires x10
- Micro USB Cable
Other projects you can build
Shipping Information
- Prepaid Orders: ₹75 for orders up to ₹999, FREE shipping above ₹999
- COD Orders: ₹125 shipping + ₹50 COD fee = ₹175 total
- Delivery Timeline: Dispatch in 1-2 days, delivery in 2-7 days depending on location
Returns & Warranty
- 7-Day Return: Manufacturing defects only (approval required)
- Warranty: 7 days from delivery
- Non-Returnable: Batteries, consumables, cut wires, clearance items