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TowMo Automated Trailer Management System
Patrick Mulenga
Verified
TowMo is a trailer management and preventative maintenance platform designed to help fleet operators track trailer health, maintenance schedules, GPS mileage, and compliance documents in real time.
Project Overview
The platform combines:
GPS mileage synchronization
Preventative maintenance tracking
Automated service alerts
Document expiration monitoring
Encrypted third party credential management
Real time Firestore automation
Scheduled Cloud Functions infrastructure
The goal was to reduce missed maintenance intervals, improve fleet visibility, and automate operational tasks that were previously handled manually.
Core Features Implemented
GPS Mileage Synchronization
TowMo integrates with an external GPS provider to retrieve live trailer mileage data.
Each trailer can be linked to a GPS device, allowing the platform to:
Sync latest trailer mileage automatically
Maintain mileage history records
Power service interval calculations
Trigger maintenance alerts dynamically
The system supports user specific GPS credentials, meaning each fleet owner securely connects their own provider account.
Secure Credential Encryption System
One of the most critical backend components was the credential security layer.
User GPS usernames and passwords are:
Encrypted before storage
Stored securely in Firestore
Decrypted only inside protected Cloud Functions
Never exposed to the client after submission
The implementation uses:
AES-256-CBC encryption
Google Secret Manager
Firebase Cloud Functions
Firestore structured encrypted payloads
This architecture allows TowMo to securely communicate with third party GPS systems without exposing sensitive credentials to the frontend.
Preventative Maintenance Engine
TowMo includes a fully automated maintenance monitoring system.
Instead of tracking only generic trailer maintenance, the platform now supports individual maintenance categories such as:
Oil changes
Tire replacements
Brake servicing
Suspension inspections
Bearing maintenance
Each maintenance type tracks:
Service frequency in miles
Service frequency in days
Next due mileage
Next service date
Historical maintenance entries
The backend continuously evaluates both mileage based and time based service intervals.
Automated Alerting System
Custom scheduled Cloud Functions run automatically to monitor fleet health.
The system generates alerts when:
Maintenance is approaching
Maintenance becomes overdue
Compliance documents are nearing expiration
Documents have expired
Alert severity levels include:
Warning
Critical
The backend also includes intelligent cooldown logic to prevent users from receiving duplicate notifications too frequently.
Maintenance Resolution Automation
When a new maintenance entry is added, the system automatically:
Resolves active maintenance alerts
Updates maintenance history
Resets monitoring intervals
Prepares the next service cycle
This creates a fully automated maintenance lifecycle.
Document Compliance Monitoring
TowMo also manages trailer documentation such as:
Insurance
Registration
Permits
Inspection certificates
The platform automatically monitors expiration dates and generates alerts before documents expire.
When a replacement document is uploaded, related alerts are automatically resolved.
Backend Architecture
Technologies Used
Firebase Cloud Functions
Firestore
Google Secret Manager
Node.js
AES-256 Encryption
RipCord GPS API Integration
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What the client had to say
Patrick was excellent to work with. Great communication and attention to detail. I would certainly hire him again.
Tyler Hansen, TowMo
Nov 18, 2025, Client
Posted May 15, 2026
TowMo is a trailer management platform that automates GPS mileage tracking via API, maintenance tracking, service reminders and document compliance.
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Timeline
Oct 31, 2025 - Nov 17, 2025
Clients
TowMo
