| Reader Communication Protocol Developer's Guide |
|
Get Antenna Ports
The command returns the current antenna configuration including which antennas are set to transmit and receive, and which ports have antennas attached. There are multiple formats for the command. We will introduce the command format for each case separately.
Command Attribute
| Command Code | Bootloader Command | App Firmware Command |
|---|---|---|
| 0x61 | No | Yes |
Host to Reader
Format of Data Field
| Field | Byte Length | Description |
|---|---|---|
| Option | 1 byte | Detailed description refers to the following table |
| Value of Option | Description |
|---|---|
| 0x00 | If the Antenna for Tag Access Operations was set using the 0x91 command before, this command returns the antenna port set. If the 0x91 command was not used to set the antenna for tag access operations, the lowest logic antenna number will be returned. |
| 0x02 | Get the logical antennas for inventory |
| 0x03 | Get reading and writing transmission power of all logical antenna ports |
| 0x04 | Get reading and writing transmission power and antenna setting time for all logical antenna ports |
| 0x05 | Get the connection status of all logical antenna ports |
Example
Example 1
Get the Antenna for Tag Access Operations
Host to Reader
| FF | 01 | 61 | 00 | BD BD |
|---|---|---|---|---|
| Header | Data Length | Command Code | Option | CRC |
Reader to Host
| FF | 02 | 61 | 00 00 | 03 | 03 | 4C 20 |
|---|---|---|---|---|---|---|
| Header | Data Length | Command Code | Status Code | TX Logical Antenna Number | RX Logical Antenna Number | CRC |
Example 2
Get the antennas for inventory
Host to Reader
| FF | 01 | 61 | 02 | BD BF |
|---|---|---|---|---|
| Header | Data Length | Command Code | Option | CRC |
Reader to Host
| FF | 05 | 61 | 00 00 | 02 | 03 | 03 | 04 | 04 | 74 39 |
|---|---|---|---|---|---|---|---|---|---|
| Header | Data Length | Command Code | Status Code | Option | TX Logical Antenna Number | RX Logical Antenna Number | TX Logical Antenna Number | RX Logical Antenna Number | CRC |
Example 3
Get the reading and writing transmission power of all logical antenna ports, assuming to be 30DBM.
Host to Reader
| FF | 01 | 61 | 03 | BD BE |
|---|---|---|---|---|
| Header | Data Length | Command Code | Option | CRC |
Reader to Host
| FF | 15 | 61 | 00 00 | 03 | 01 | 0B B8 | 0B B8 | 02 | 0B B8 | 0B B8 |
|---|---|---|---|---|---|---|---|---|---|---|
| Header | Data Length | Command Code | Status Code | Option | TX Logical Antenna Number | Read Power | Write Power | TX Logical Antenna Number | Read Power | Write Power |
| 03 | 0B B8 | 0B B8 | 04 | 0B B8 | 0B B8 | F7 6F |
|---|---|---|---|---|---|---|
| TX Logical Antenna Number | Read Power | Write Power | TX Logical Antenna Number | Read Power | Write Power | CRC |
Example 4
Get the reading/writing transmission power and setting time of all logical antenna ports, assuming to be 30DBM. The setting time has no practical significance at present.
Host to Reader
| FF | 01 | 61 | 04 | BD B9 |
|---|---|---|---|---|
| Header | Data Length | Command Code | Option | CRC |
Reader to Host
| FF | 1D | 61 | 00 00 | 04 | 01 | 0B B8 | 0B B8 | 01 F4 | 02 | 0B B8 | 0B B8 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Header | Data Length | Command Code | Status Code | Option | TX Logical Antenna Number | Read Power | Write Power | Setting Time | TX Logical Antenna Number | Read Power | Write Power |
| 01 F4 | 03 | 0B B8 | 0B B8 | 01 F4 | 04 | 0B B8 | 0B B8 | 01 F4 | 25 27 |
|---|---|---|---|---|---|---|---|---|---|
| Setting Time | TX Logical Antenna Number | Read Power | Write Power | Setting Time | TX Logical Antenna Number | Read Power | Write Power | Setting Time | CRC |