| Reader Communication Protocol Developer's Guide |
|
Get Frequency Hopping
This command is used to get the information of frequency hopping and frequency hopping time. The command has two formats for getting the frequency hopping table and regulatory hopping time.
Command Attribute
| Command Code | Bootloader Command | App Firmware Command |
|---|---|---|
| 0x65 | No | Yes |
Host to Reader
Get Frequency Hopping Table
There is no Data filed in host-to-reader command.
Get Regulatory Hopping Time
Format of Data Field
| Field | Byte Length | Description |
|---|---|---|
| Option | 1 byte | Must be 0x01 |
Reader to Host
Get Frequency Hopping Table
Format of Data Field
| Field | Byte Length | Description |
|---|---|---|
| frequencies | M*4 bytes | M frequencies, each frequency is 4 bytes length. |
Get Regulatory Hopping Time
Format of Data Field
| Field | Byte Length | Description |
|---|---|---|
| Option | 1 byte | Must be 0x01 |
| Hop time | 4 bytes | Frequency hopping time, in milliseconds |
Example
Example 1
Get Frequency Hopping Table
Reader to Host
| FF | 0C | 65 | 00 00 | 00 0D F9 26 | 00 0D C8 52 | 00 0E 24 1E | 2C B5 |
|---|---|---|---|---|---|---|---|
| Header | Data Length | Command Code | Status Code | 915250KHZ | 903250KHZ | 926750KHZ | CRC |
Example 2
Get Regulatory Hopping Time
Host to Reader
| FF | 01 | 65 | 01 | B9 BC |
|---|---|---|---|---|
| Header | Data Length | Command Code | Option | CRC |
Reader to Host
| FF | 05 | 65 | 00 00 | 01 | 00 00 01 90 | 4B 6C |
|---|---|---|---|---|---|---|
| Header | Data Length | Command Code | Status Code | Option | Hop time | CRC |