Network Interface Names After Embedded Linux Updates: Keep Services Bound to the Right Port
Preserve physical network roles across updates by checking stable identity, systemd link-rule precedence and every service binding.
-
-
Kernel Modules After a Buildroot LTS Update: vermagic, Symbols and Signing
Separate module ABI, symbol-version and signing failures from missing dependencies and device-binding problems after an update.
-
Buildroot Image Size Budgets: Trace Growth Before Flash Partitions Overflow
Separate file attribution, filesystem capacity and update-image size, then turn the flash map into auditable byte budgets.
-
Buildroot External SDK Handover: Relocation, Sysroots and Application ABI Checks
Deliver a Buildroot SDK that survives relocation and produces applications with explicit, checked compatibility to the target image.
-
RFC 2217 Serial Control: Baud Rate and Modem Signals Across TCP
Verify RFC 2217 negotiation, IAC escaping, applied serial settings and modem-signal capabilities before replacing a local serial connection.
-
Modbus Device Identification: Discover Vendor and Revision Without Guessing Registers
Discover Modbus vendor, product and revision objects with bounded pagination, capability handling and honest identity limits.
-
Serial Parity and Framing Errors in Gateways: Preserve UART Evidence Above the Byte Stream
Preserve UART parity, framing and overrun evidence through Linux driver and TTY policies instead of reporting only CRC failures.
-
Modbus Mask Writes and Read/Write Registers: Avoid Unsafe Read-Modify-Write Assumptions
Choose native FC22 mask updates or FC23 write-then-read with explicit concurrency and device-support boundaries.
-
Modbus CRC Byte Order: Separate Wire CRC from Register Endianness
Test RTU CRC coverage and low-byte-first serialization independently from register byte and word order.
-
Modbus RTU over TCP Is Not Modbus TCP: Identify the Frame Format Before Integration
Identify MBAP and RTU-byte tunnel formats using a complete byte example, then document exactly what a gateway adds or removes.
