Use a formatted USB drive and place the .bin firmware file in the root directory.
"sensor": "ambient_temp", "value_c": 23.6, "timestamp": "2026-03-22T12:34:56Z" 3rt841b firmware
18;write_to_target_document1a;_kmvsaYrvKPfmi-gPq5eUsQk_10;56; Use a formatted USB drive and place the
"sensor": "ambient_temp", "value_c": 23.6, "timestamp": "2026-03-22T12:34:56Z"
18;write_to_target_document1a;_kmvsaYrvKPfmi-gPq5eUsQk_10;56;