RDT Edge Controllers
IoT & Engineering · Pilot · v1.0-beta
RDT Edge are ESP32-S2/C3 Modbus RTU hardware terminals with offline ACL synchronisation that physically interface with boom gates, weighbridges and solar backends to keep operations live during network outages and load-shedding. USB CDC+HID, WiFi/WebServer/SPIFFS employees.json, Modbus, AS608/R558, ArduinoJson streaming, with memory RCA documentation and xUnit-tested WinForms ImportExport backup tools. Field-deployable access control.
Business problem
Booms and weighbridges stall when cloud ACL is unreachable and cheap terminals corrupt memory under load.
Core capabilities
- ▸ESP32-S2/C3 Modbus RTU
- ▸Offline ACL sync (SPIFFS employees.json)
- ▸USB CDC+HID + WiFi/WebServer
- ▸AS608/R558 fingerprint
- ▸ArduinoJson streaming + chunked print + yield/vTaskDelay
- ▸WinForms ImportExport + JsonRepair + fuzzy Excel mapping
- ▸Memory RCA documented
Architecture
Terminals sync ACL to SPIFFS; operate autonomously on Modbus; backhaul via WiFi/HTTP/MQTT when link returns. Backup tool audits Excel mappings.
Deployment: On-prem hardware + WinForms provisioning tool.
Licensing: Hardware + per-terminal licence.
Evidence & confidence
Confidence: medium
- Mobisec-Projects_2026.pdf — RDT Edge row
- RdtAutomation ESP32-S2 projects + Memory_Analysis.md
- WinForms ImportExport with xUnit tests
At a glance
- Platforms
- ESP32-S2/C3 · Windows (provisioner) · Modbus RTU
- Stack
- Arduino C++ (ESP32-S2/C3) · Modbus RTU · SPIFFS · WinForms .NET 8 + ClosedXML · Docker (reference)
- Integrations
- OmniAccess · OmniYard · OmniGrid · OmniVisit
- Maturity
- Beta (medium confidence)
Target customers
- · Estate and industrial gates
- · Weighbridge operators
- · Solar + access integrators
Roadmap
Additional Modbus register maps; mass-provisioning workflow.