| Reader Communication Protocol Developer's Guide |
|
Set GPO
This command has two formats for setting gpo and getting gpo status. Different reader types have different gpo numbers.
Command Attribute
| Command Code | Bootloader Command | App Firmware Command |
|---|---|---|
| 0x96 | No | Yes |
Host to Reader
Set Gpo
Format of Data Field
| Field | Byte Length | Description |
|---|---|---|
| Gpo Number and Status pairs | M*2 bytes | M Gpo number and status pairs, each pair is 2 bytes(the first byte is the GPO number, the second byte is the status) |
Get Gpo Status
There is not Data Field.
Reader to Host
When getting gpo status the Format of Data Field in reply is as follows.
Format of Data Field
| Field | Byte Length | Description |
|---|---|---|
| Status of Gpo pins | N bytes | The status of all the gpo of reader in numerical order. |
Example
Example 1
Set Gpo
Host to Reader
| FF | 04 | 96 | 01 | 01 | 02 | 00 | 2F 68 |
|---|---|---|---|---|---|---|---|
| Header | Data Length | Command Code | Output #1 | Status of Output #1 | Output #2 | Status of Output #2 | CRC |
Example 2
Get Gpo Status
Reader to Host
| FF | 03 | 96 | 00 00 | 01 | 00 | 01 | EE 3A |
|---|---|---|---|---|---|---|---|
| Header | Data Length | Command Code | Status Code | Status of Output #1 | Status of Output #2 | Status of Output #3 | CRC |