This note captures what was directly observed from the archived TC66 resource bundle before any deeper reverse engineering.
TC66.pdfUser Maual for Operation and PC software and APP of TC66(C) Type-c USB PD Trigger Meter 2019.6.5.pdfTC66C_V1.1.6.apkRuiDengUSBMeter_V1.0.0.6.rar (reviewed locally, not retained in git)PW0316_User_Manual_V2.9.pdfFactory technical support and conctact way .docx
Reason: byte-for-byte duplicate of the contact document already imported from the UM24 archiveTC66.pdf is a shorter 9-page document with title metadata TC66/TC66CUser Maual ... TC66(C) ... 2019.6.5.pdf appears intended to cover device operation plus PC and Android software usageTC66C_V1.1.6.apk surfaced repeated TC66C identifiers and RuiDeng branding, which makes this artifact more model-specific than the generic UM-family APKsRuiDengUSBMeter_V1.0.0.6.rar shows a Windows desktop application, English and Chinese language files, x86/x64 drivers, and a bundled .NET Framework 4.6 installerTC66 Manuals Working Summary.mdTC66 is USB-onlyTC66C supports USB and BluetoothTC66C-only and explicitly BLE-basedTC66C-onlymicro-USB, not BluetoothPD / CC pull-down state an important part of correct measurement behaviorPW0316 module manual explicitly validates the FFE0/FFE4 notify path and FFE5/FFE9 write path already assumed by the appTC66(C)TC66C Transport and Payload Working Note.md now records how the current app models TC66C transport and decoded fieldsPW0316 BLE Module Working Summary.md note now records what the radio module manual validates at the BLE transport layer