We engineer electronics, from PCB to cloud.
SensorLoop is an embedded engineering company in India. We design hardware and PCBs, write firmware and embedded Linux software, build the apps and dashboards around them — and make our own Industrial IoT products like the ModbusSudo gateway.
- PCB layout
- Mixed-signal design
- ARM Cortex-M
- ESP32
- FreeRTOS
- Embedded Linux
- Yocto / Buildroot
- Modbus RTU / TCP
- MQTT
- LoRa · BLE · WiFi · 4G
- React / Next.js
- IoT dashboards
Everything your electronic product needs, under one roof
Hire us for a single board, a firmware module or the complete product. One team means fewer hand-offs, faster bring-up and nobody blaming the other side.
PCB Design & Layout
Multi-layer, mixed-signal and industrial PCB layouts with DFM checks, ready for fabrication and assembly.
Learn moreHardware Design
Schematics, component selection, power and sensor interfaces, prototypes and board bring-up.
Learn moreFirmware Development
Reliable microcontroller firmware — drivers, RTOS, communication protocols, bootloaders and OTA.
Learn moreEmbedded Linux
Custom Linux images, kernel drivers, device trees and BSPs for gateways, HMIs and edge devices.
Learn moreApplication Development
Web dashboards, mobile apps and desktop tools that configure and control your hardware.
Learn moreIndustrial IoT Solutions
Connect machines, meters and sensors to secure cloud dashboards with alerts and reports.
Learn moreFrom idea to a product on your shelf
Every stage is handled by the same engineers, so what's designed on the schematic is exactly what the firmware and app expect.
- 01
Concept
Requirements, feasibility, architecture
- 02
Hardware
Schematic, components, power
- 03
PCB
Layout, DFM, fabrication files
- 04
Firmware / Linux
Drivers, protocols, OS
- 05
Apps & cloud
Dashboards, mobile, APIs
- 06
Production
Testing, small batch, support
ModbusSudo — an IIoT gateway we designed end to end
Our engineers built ModbusSudo from the schematic up: hardware, PCB, firmware and the cloud platform. It reads data from any Modbus device and shows it live on the SensorLoop portal.
- Modbus RTU (RS-485) & Modbus TCP
- Multiple slave devices per gateway
- 9–36 V DC industrial power input
- WiFi & Ethernet, optional 4G / LoRa
- Local buffering when the network drops
- Live dashboards, alerts & reports
Live TDS monitoring for water and RO plants
A TDS sensor on the RO outlet talks Modbus over RS-485. ModbusSudo reads it every few seconds and the operator sees TDS, pH and flow on their phone — with an alert the moment water crosses the BIS limit.
- STEP 01
TDS / pH sensor
Installed on the tank or RO outlet, connected over RS-485.
- STEP 02
ModbusSudo gateway
Reads the sensor, buffers data and sends it securely to the cloud.
- STEP 03
SensorLoop portal
Live values, trends, daily compliance % and reports.
- STEP 04
Instant alerts
WhatsApp, SMS or email when TDS or pH goes out of range.
- TDS rising · Tank 02
- pH back in range
An engineering partner, not just a vendor
One team, full stack
Hardware, firmware, Linux, apps and cloud engineers working on the same product.
We ship our own products
ModbusSudo runs in the field, so we design for real-world reliability, not demos.
Clean handover
Schematics, PCB files, BOM, source code and documentation delivered as agreed.
Local, responsive support
Based in Gujarat with on-site visits, quick replies and support after launch.
Common questions before a project starts
Share your idea or existing design — we'll reply with a plan, timeline and estimate.
Can you take a product from idea to production?+
Yes. We handle requirements, hardware and schematic design, PCB layout, firmware or embedded Linux, the app or cloud dashboard, prototypes and testing — and support you through small-batch production. You can also hire us for just one part.
Do you work on existing designs?+
Yes. We take over existing boards and code: fixing bugs, redesigning around obsolete or costly components, adding connectivity, or porting firmware to a new microcontroller.
Who owns the design files and source code?+
For client projects the agreed deliverables — schematics, PCB files, BOM, source code and documentation — are handed over to you as defined in the project agreement. We are happy to sign an NDA before you share details.
What is ModbusSudo and how does it relate to your services?+
ModbusSudo is our own Industrial IoT gateway, designed in-house end to end — hardware, PCB, firmware and cloud platform. It is both a product you can buy and a working example of what our engineering team builds.
Have a product idea or a board that needs work?
Tell us what you're building. We'll suggest the right approach — from a quick design review to a complete product — with a clear estimate.