CFW Command — Modem DFOTA

Remotely update the cellular modem firmware (DFOTA) by downloading a delta package, with phase and progress telemetry.

What is it for?

📡 Main use cases:

• ⬆️ Update the cellular modem firmware in the field, without physical access
• 🌐 Fix network or operator compatibility via remote update
• 📊 Monitor the phase and progress of an ongoing update
• 🏭 Force an update on the test bench, ignoring the battery check

Commands

SCFW — Trigger the update

SCFW"<url>.pack"
SCFW^"<url>.pack"

• The URL must start with http, https or ftp. Quotes are optional.
• The ^ prefix forces the update skipping the battery brick-guard (intended for the test bench). Without ^, the device requires FULL battery.
• The package is a directional delta with the name format <from>-<to>: it is applied over a specific source version to bring the modem to a target version.

Internally the device launches the update only with an active data context and monitors progress via modem notifications.

SCFW responses

Examples

// Trigger a normal update (requires FULL battery)
>SCFW"http://fota.rinho.com.ar/dfota/v1-v2.pack"<
>RCFW OK<
 
// Force on the bench, ignoring the battery check
>SCFW^"http://fota.rinho.com.ar/dfota/v1-v2.pack"<
>RCFW OK<
 
// Invalid URL
>SCFWfota.rinho.com.ar/v1-v2.pack<
>RCFW ERR-URL<

QCFW — Query phase and progress

QCFW

Response

RCFW<phase>,<pct>

The <pct> field (3 digits, 000-100) indicates the progress of the updating phase. The phase is preserved after finishing, so QCFW lets you query the result of the last update remotely.

Examples

// Query during download
>QCFW<
>RCFW2,045<   // phase 2 (downloading), 45%
 
// Query with the update finished
>QCFW<
>RCFW4,100<   // phase 4 (OK), 100%
 
// Query with no update in progress
>QCFW<
>RCFW0,000<   // idle

See Also

• Cellular connection status (QCEL)
• Robust network registration (SCOP / SCRM)

Compatibility