5.7.3.1.2 OTAPC DFU Update Request (DFUU…)
Format: DFUU,<hex32>,<hex8>,<hex32>
Use the DFUU command to request updating for the firmware image.
- First parameter – Total image size (must be 16-bytes aligned)
- Second parameter – Encryption status of the image
- Third parameter – Flash image ID
The RNBD451 device responds with the maximum fragmented image size and indicates the current firmware version of remote side (see the following table).
This command initiates a %OTA_REQ% request to the remote device and waits for its approval. The remote device can either accept (OTAA,01) or reject (OTAA,00) the request.
| Example: | DFUU, 00046400,01,9B000001 | // DFU update request, the total image size is 0x46400, the image is encrypted and the flash image ID is 9B000001 for RNBD451 |
| Response: | DFUU, 0200,01020304 | // Update request has accepted // The allow max fragmented image size is 0x200. // The firmware version on the remote device is v1.2.3.4. |
| Err | // Remote peer does response error, DFU aborted |