LEXUNYU DDD project notes https://lexunyu.com/blog Evidence-led DDD and fleet telematics notes from LEXUNYU. Remote Tachograph DDD File Delivery: What the Receiving System Must Confirm https://lexunyu.com/blog-remote-tachograph-ddd-file-api-delivery-checklist-2026 https://lexunyu.com/blog-remote-tachograph-ddd-file-api-delivery-checklist-2026 Preserve the original signed file, assign the receiving route and record evidence that confirms delivery. Thu, 03 Sep 2026 00:00:00 +0000 Scheduled Remote Tachograph DDD Downloads: What Must Be Defined Before Automation https://lexunyu.com/blog-scheduled-remote-tachograph-ddd-downloads-2026 https://lexunyu.com/blog-scheduled-remote-tachograph-ddd-downloads-2026 Define fleet scope, cadence, file scope, signed-file handoff and pilot evidence before scheduled DDD downloads are automated. Wed, 02 Sep 2026 00:00:00 +0000 Fuel and AdBlue Data from J1939 Still Need Vehicle-by-Vehicle Validation https://lexunyu.com/blog-fuel-adblue-j1939-vehicle-validation-2026 https://lexunyu.com/blog-fuel-adblue-j1939-vehicle-validation-2026 Validate fuel and AdBlue field availability, state, scaling, freshness and handoff for each vehicle configuration. Mon, 31 Aug 2026 00:00:00 +0000 Company Card Authentication in Remote Tachograph Downloads https://lexunyu.com/blog-company-card-authentication-remote-tachograph-download-2026 https://lexunyu.com/blog-company-card-authentication-remote-tachograph-download-2026 Define company-card authentication responsibility and reviewable evidence before a remote tachograph download pilot. Fri, 29 Aug 2026 00:00:00 +0000 What HGV Integrators Should Confirm Before Comparing Remote-Download Hardware https://lexunyu.com/blog-hgv-integrator-remote-download-hardware-checklist-2026 https://lexunyu.com/blog-hgv-integrator-remote-download-hardware-checklist-2026 A practical evidence checklist for a consistent HGV remote-download project brief. Sat, 29 Aug 2026 00:00:00 +0000 FMS/RDD or Direct Tachograph Connection? https://lexunyu.com/blog-fms-rdd-or-direct-tachograph-connection-2026 https://lexunyu.com/blog-fms-rdd-or-direct-tachograph-connection-2026 Compare FMS/RDD and direct tachograph connection routes by vehicle path, authentication, installation evidence and file destination. Fri, 28 Aug 2026 00:00:00 +0000 CAN Data Is Not a Remote Tachograph DDD Download https://lexunyu.com/blog-can-data-is-not-remote-tachograph-ddd-download-2026 https://lexunyu.com/blog-can-data-is-not-remote-tachograph-ddd-download-2026 Why vehicle signals do not by themselves prove an authenticated remote tachograph DDD file download. Thu, 27 Aug 2026 00:00:00 +0000 Who Owns Each Step in a Remote Tachograph DDD Download Project? https://lexunyu.com/blog-who-owns-each-step-remote-tachograph-ddd-download-project-2026 https://lexunyu.com/blog-who-owns-each-step-remote-tachograph-ddd-download-project-2026 A buyer-side responsibility map for remote tachograph DDD downloads: authentication, scheduling, retries, signed files and platform handoff. Mon, 25 Aug 2026 00:00:00 +0000