- Client
- IoT device maker (under NDA)
- Users
- Field installers and end customers
- Built
- Android app plus matching firmware
- Features
- Provisioning, configuration, live monitoring, updates
The problem
Every device installation needed a technician with a laptop, a USB-serial cable and a text file of commands. It took around twenty minutes per device, mistakes were common, and end customers could not change settings without calling support.
How I solved it
Secure pairing
The device advertises over Bluetooth Low Energy. The app connects and establishes an encrypted session before any settings are exchanged.
Wi-Fi setup
The app scans for nearby networks, sends credentials securely and confirms the device has connected.
Configuration and monitoring
Settings, live readings and device health are shown in a simple interface, for installers and customers.
Updates from the phone
Firmware updates can be pushed from the app as well as over the network.
Built with the firmware
I designed the BLE services and the app together, so there is one protocol document and no mismatch between the two.
What the client got
Results
- Setup time cut from about twenty minutes to about two.
- Installers and customers can configure devices without a laptop.
- Fewer support calls and fewer installation mistakes.
- An app and firmware that were designed as one product.
Embedded systems consultant at TechProgeny, Bengaluru. 7+ years and 29+ shipped products across firmware, embedded Linux, edge AI, apps and IoT servers.