IoT Hardware
Industrial IoT
Mobile App
BLE

Bheru — a secure BLE timer that runs your facility's schedule

A secure timer-controller on Nordic nRF52840 that drives industrial hooters across hospitals, schools and factories — shift schedules, lunch breaks and emergency alerts, all set from a mobile app over Bluetooth.

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Inside the project

From a low-power board to a whole facility's bell

The secure timer hardware, and how it schedules hooters across hospitals, schools and industries.

Bheru Smart Timer hardware — Nordic nRF52840, 2-layer PCB, smart buzzer, set timer — Ultra-low-power nRF52840 board on a 2-layer PCB — smart buzzer output, timer scheduling and BLE + ZigBee connectivity, produced at 500 pieces a month.

Bheru BLE timer industrial use — hooter control for hospital, school and industries with shift schedules — One timer controls hooters for every shift — morning, evening, night and lunch break — across hospitals, schools and industries, with authority-only access and a five-step Bluetooth setup.

Under the hood

Hardware specification

The numbers behind the timer — built for years of unattended duty.

Microcontroller

Nordic nRF

ARM Cortex-M4 / M33 (nRF52840)

Clock speed

128 MHz

32-bit architecture

Memory

512 KB – 1 MB

flash · 64–256 KB RAM

Connectivity

BLE + ZigBee

Low-power wireless

PCB design

2 layers

compact low-power layout

Production

500 pc

manufactured in-house monthly

How we build

Steps of our design process

Every board in our portfolio goes through the same seven in-house stages.

01
Component Selection
02
Component Placement
03
Schematic Diagram
04
PCB Layout Design
05
Gerber File Generation
06
Fabrication
07
Final Production

Scope of work

What Bheru can do

01 Hardware Development
02 Mobile App Development
03 Industrial Deployment

Shift schedules

Morning, evening, night and lunch-break timings per department, on one device.

Five-step BLE setup

Connect to power, scan with Bluetooth, add nearby devices, add schedules, edit anytime.

Authority-only control

The timer answers only to authorised users — schedules can't be tampered with.

Smart buzzer

Drives industrial hooters accurately across multiple buildings and time slots.

Ultra-low power

The nRF52840 chip sips power — designed to run unattended for years.

Companion app

Set times like 07:30–12:30 per shift with personal credentials, from anywhere.

Our portfolio

More from our portfolio

Every project gets its own page like this one.

Smart Doormat

End-to-end development of a connected doormat: custom ESP32 hardware, UI/UX and a companion mobile app. It detects motion, weight and distance, tells a person from a pet, plays custom alert tones and logs every visit for you to review later.

Smart Wi-Fi Plug

An ESP32-based smart plug that controls multiple devices from one app: lamp scenes for morning, night and evening, per-device schedules, shared family access, and power-consumption reports you can compare and download.

Smart RO Filter

A connected RO purifier that analyses every filter stage over Wi-Fi and Bluetooth: input vs pure vs waste water ratios with chemical details, automatic tickets when a cartridge wears out, and a notification for every conduction change.