LoRa Flood Early-Warning System (Pair)
Field node plus base station, 865–867 MHz, solar-assisted, 2 km demonstrated.
₹7,499MADE TO ORDER
Operates in the 865–867 MHz de-licensed band as permitted under WPC GSR 564(E). No licence required.
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12 mo warranty · pre-assembled · ships in 2 days
What you can demonstrate
- →Field node reports level, temperature and battery every 60 seconds
- →Base station shows level, trend arrow, RSSI, last-heard age and battery
- →A silent node raises its own amber alarm after five minutes with no packet
- →Deep sleep at ~10 µA gives months on one 18650 plus the panel
Bill of materials
Every component, by part number. Check our prices against any supplier you like.
| Part | Description | Qty |
|---|---|---|
| ESP32 DevKit V1 | Field node controller | 1 |
| EBYTE E220-900T22D | 868 MHz LoRa transceiver, 22 dBm — field nodeFed from 5V with a 470 µF cap; never power it without an antenna | 1 |
| SMA antenna 868 MHz 3 dBi | With pigtail — field node | 1 |
| JSN-SR04T | Waterproof ultrasonic level probe | 1 |
| DS18B20 + 4.7kΩ | Waterproof temperature probe with pull-up | 1 |
| TP4056 | Li-ion charge module with protection | 1 |
| 18650 holder | Single cell, wiredCell NOT included — buy locally | 1 |
| Solar panel 6V 2W | Trickle charge for the field node | 1 |
| 1N5819 + 470 µF | Schottky blocking diode and bulk cap | 1 |
| IP65 enclosure 150×100×70 | With cable glands — field node | 1 |
| ESP32 DevKit V1 | Base station controller | 1 |
| EBYTE E220-900T22D | 868 MHz LoRa transceiver — base station | 1 |
| SMA antenna 868 MHz 3 dBi | With pigtail — base station | 1 |
| ST7735 | 1.8in TFT display, level and trend | 1 |
| Buzzer + LEDs | Green / amber / red status set | 1 |
| Adapter 5V 2A | Base station supply | 1 |
| Acrylic desk enclosure | Base station housing | 1 |
Questions
- Do I need a licence to run this in India?
- No. It operates in the 865–867 MHz de-licensed band permitted under WPC GSR 564(E), up to 1 W ERP. The module at 22 dBm with a 3 dBi antenna sits well inside that. Configure the channel at 866.0 MHz — the 915 MHz default that ships on some units is not free in India, and ours are set correctly before packing.
- Why is it sold as a pair?
- A single board is not a flood warning system. You need the sensing node in the field and the base station on the desk to show the link working, and that end-to-end demonstration is what earns the marks.
- How far does the link actually reach?
- We measured 2.1 km line of sight in Chennai with the supplied 3 dBi antennas at −104 dBm RSSI. Dense urban clutter cuts that substantially; the report gives the measurements and the conditions rather than a headline number.
- Does the report come with it?
- Yes. Every kit ships with the editable report (.docx and .pdf), a 20-slide PPT, circuit and block diagrams, commented source with pinned library versions, 25 viva questions with answers, and a printed wiring sheet in the box.
- Can I change the topic or add a feature?
- Tell us on WhatsApp before you order. Small firmware changes are usually fine; a different sensor means a different kit and a different price.
- Is there cash on delivery?
- No. Prepaid only — UPI, card or netbanking. It keeps the price where it is.
- Will the report match my college format?
- The .docx is unlocked and editable, so you add your college name, roll number and guide. The chapter skeleton follows the standard Anna University / AICTE structure.
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₹7,499