# OTA AT commands
Source: [https://docs.qualcomm.com/doc/80-Y8730-10/topic/ota_at_commands.html](https://docs.qualcomm.com/doc/80-Y8730-10/topic/ota_at_commands.html)
Table : OTA AT commands
| Command | Description |
| --- | --- |
| [AT+OTAFWUP](https://docs.qualcomm.com/doc/80-Y8730-10/topic/ota_at_commands.html#at_otafwup) | Start the OTA process |
| [AT+OTATRIAL](https://docs.qualcomm.com/doc/80-Y8730-10/topic/ota_at_commands.html#at_otatrial) | Accept/reject downloaded images |
Note: These commands only apply to hostless SBL with external flash.
## AT+OTAFWUP
Source: [https://docs.qualcomm.com/doc/80-Y8730-10/topic/ota_at_commands.html](https://docs.qualcomm.com/doc/80-Y8730-10/topic/ota_at_commands.html)
This command starts the OTA process.
### Operation type
Execution
### Syntax
| Command | Response |
| --- | --- |
| AT+OTAFWUP=<protocol>,<url>,<fw filename>,[flag],[timeout],[size] | OK/ERROR
Event:
+EVT:OTAFWUP\_START: This indicates that the OTA process is started.
+EVT:OTAFWUP\_ERROR: This indicates that something goes wrong in the OTA process. [^1^](https://docs.qualcomm.com/doc/80-Y8730-10/topic/ota_at_commands.html#fntarg_1_at_otafwup)
+EVT:OTAFWUP\_FIN: This indicates that the OTA process is done. [^2^](https://docs.qualcomm.com/doc/80-Y8730-10/topic/ota_at_commands.html#fntarg_2_at_otafwup) |
[^1^](https://docs.qualcomm.com/doc/80-Y8730-10/topic/ota_at_commands.html#fnsrc_1_at_otafwup) An error code is included in this message. You can find the meaning of the error code in the ota\_http.h and fw\_upgrade\_mem.h header files. For example, error code `-110105` indicates that the HTTP connection fails. In this case, check the HTTP connection and try the OTA operation again.
[^2^](https://docs.qualcomm.com/doc/80-Y8730-10/topic/ota_at_commands.html#fnsrc_2_at_otafwup) In rare cases, the host may not receive this message after the OTA process has started for a long time, although OTA should complete quickly (depending on the network environment). This issue may occur if the `auto-reboot` flag is set and the DUT reboots before it sends the message to the SPI host. In this scenario, to verify whether the OTA process has been successful, use the `AT+OTATRIAL` command to try to accept the trial image. If the OTA process is successful, the command returns `AT+OTATRIAL:Success to Accept Trial FWD`. Otherwise, the command returns `AT+OTATRIAL: Fail to Accept Trial FWD`.
### Defined values
- ``: The protocol of transmission process, only “http” is available now
- ``: The URL of the HTTP server
- ``: The filename of the OTA binary file
- `[flag]`: Optional. This is a bitmask that specifies the operations to perform during the OTA process. Set the corresponding bit to `1`to enable the corresponding operation:
- Bit 0: Auto reboot (default value)
- Bit 1: Duplicate FS
- Bit 2: HTTP GET with range headers
When bit 2 is set to `1`, each HTTP GET request includes a range header and downloads 512 bytes of the image specified by that header. When a timeout occurs, the HTTP GET request is sent again. OTA fails when the second timeout happens. Currently, this option only supports all-in-one OTA.
**Example**:
The following command duplicates FS and reboots the device after the download completes:
AT+OTAFWUP=http,"","ota.bin",3Copy to clipboard
- `[timeout]`: HTTP GET timeout in milliseconds. The OTA process fails if no data is received within the specified timeout period. The default value is `20000` (20 seconds). This argument is necessary when using HTTP GET with range headers.
- `[size]`: This argument is necessary when using HTTP GET with range headers. To determine the file size, use the `AT+HTTPGETSIZE` command.
**Example**:
AT+HTTPGETSIZE="/ota.bin"
AT+OTAFWUP=http,"","ota.bin",5,20000,Copy to clipboard
## AT+OTATRIAL
Source: [https://docs.qualcomm.com/doc/80-Y8730-10/topic/ota_at_commands.html](https://docs.qualcomm.com/doc/80-Y8730-10/topic/ota_at_commands.html)
This command accepts/rejects the downloaded images
### Operation type
Execution
### Syntax
| Command | Response |
| --- | --- |
| AT+OTATRIAL=<1|0(accept|reject)>,<reboot\_flag> | For accept:
AT+OTATRIAL:Success to Accept Trial FWD
OK
AT+OTATRIAL:Fail to Accept Trial FWD
ERROR
For reject:
AT+OTATRIAL:Success to Reject Trial FWD
OK
AT+OTATRIAL:Fail to Reject Trial FWD
ERROR
|
### Defined values
- `<1|0(accept|reject)>`:
- `1`: Accept
- `0`: Reject
- ``:
- `1`: Reboot
- `0`: Don't reboot
Last Published: Jun 03, 2026
[Previous Topic
DFU AT commands](https://docs.qualcomm.com/bundle/publicresource/80-Y8730-10/topics/dfu_at_commands.md) [Next Topic
File store AT commands](https://docs.qualcomm.com/bundle/publicresource/80-Y8730-10/topics/file_store_at_commands.md)