ESP32 Industrial Alarm Annunciator Kit with ESP32 + Relay
ESP32 Industrial Alarm Annunciator Kit: Real-Time Plant Monitoring with MQTT and Relay Outputs
Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.
Step into the shoes of an automation engineer and build a full-fledged alarm annunciator that many chemical plants, refineries, and power stations rely on every day. This kit transforms an ESP32 into an eight-channel digital watchdog that triggers relays and publishes every event with an accurate timestamp using MQTT — exactly the kind of system required in SCADA and plant monitoring dashboards.
What You'll Build
You'll assemble an DIN rail‑mountable panel that reads eight discrete alarm inputs — such as limit switches, pressure sensors, or fire detectors — and drives a relay module to activate sirens, beacons, or shut‑off valves. A 2.4‑inch TFT screen displays live channel status, while the onboard DS3231 RTC stamps every event. Simultaneously, an MQTT client sends JSON payloads to any broker, ready to feed into Node-RED, Ignition, or a custom plant‑wide dashboard.
What You'll Learn
- Configure eight GPIO inputs with external pull‑down resistors and debounce logic for industrial noise immunity
- Interface an 8‑channel relay module to drive real loads up to 10 A at 250 VAC
- Implement MQTT publish/subscribe with ESP32, including QoS levels, last‑will messages, and timestamp embedding using a DS3231 RTC
- Design a regulated 5V/3.3V power tree from a 24V industrial supply using an LM2596 buck converter
Kit Contents
| Component | Quantity |
|---|---|
| ESP32 Dev Board | 1 |
| 8-ch Relay Module | 1 |
| DS3231 RTC | 1 |
| MicroSD Module | 1 |
| 2.4in TFT ILI9341 | 1 |
| LM2596 Buck Converter | 1 |
| 10kΩ Resistors | 10 |
| 100nF Caps | 15 |
| PCB Prototype Board | 3 |
| DIN Rail Enclosure | 1 |
| 24V 3A PSU | 1 |
| Soldering Iron | 1 |
| Solder Wire | 1 |
Why Buy This Kit Instead of Sourcing Parts Separately
| Factor | Sourcing Separately | Compoden Kit |
|---|---|---|
| Compatibility checks | You verify every part | 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
Final‑year B.Tech ECE and EEE students at IIT, NIT, VIT, and BITS who need a robust project to demonstrate industrial IoT and automation. Smart India Hackathon participants building plant safety or smart factory prototypes. ATL mentors guiding advanced students through a real‑world SCADA‑like setup. The kit expects soldering experience and familiarity with Arduino IDE or PlatformIO.
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 inside the box to chat with your AI companion, which knows every wire and line of code for this annunciator. If you need a human, reply over WhatsApp and our engineer will join the conversation.
Can this kit be used for real industrial applications?
Absolutely. The relay outputs can switch actual 230VAC loads, and the MQTT payloads are production‑ready. Use it as a training panel, a proof‑of‑concept, or even in a low‑criticality monitoring rack with proper safety isolation.
Do I need prior experience with MQTT?
Not at all. The AI companion walks you through setting up a local Mosquitto broker, subscribing on a smartphone, and sending timestamped JSON — all in one guided flow.
Is soldering required or are there pre-soldered options?
This advanced kit includes a soldering iron and solder wire because you’ll mount components on prototype boards and wire the DIN rail enclosure. Soldering is part of the learning; the companion app has slow‑motion video guides for each joint.
Eight digital input channels on ESP32 monitor plant alarms. MQTT publishes each alarm event with timestamp.
What's in this kit
Choose your assembly option:
- Soldering Kit — 25W soldering iron, 60/40 solder wire, flux, and small perfboard for permanent assembly.
- Breadboard Combo — 800-point full-size breadboard with 65-piece jumper wire pack for solderless prototyping.
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