Thingmagic M5e-Compact Instrukcja Użytkownika Pobierz pdf (Strona 183)

Get Application Commands

Command Set 183

Available Statistics

The response to a Get Reader Statistics command contains the following information:

Statistics Flag Bit Statistic

Bit 0 (0x01) RF On Time (ms)- Indicates the aggregate time the transmitter has been on, in milli-

seconds, since the counter was last reset.

Returned value contains N bytes (N/2 on the M5e-Compact), Where N = the number

of valid logical antennas based on the

Antenna Ports configuration X 4 bytes for

each antenna.

Note: Clock rolls over every 2

milliseconds and must be taken into account by

user application.

Bit 1 (0x02) Noise Floor - When requested the reader will listen on each available logical

antenna and report the noise floor in units equivalent to the units returned for

Tag

Read Meta Data RSSI value.

Returned value contains N bytes (N/2 on the M5e-Compact), Where N = the number

of valid logical antennas based on the

Antenna Ports configuration x 1 byte for each

antenna, in ascending antenna order.

Note: A single RF operation (read, etc.) must be performed before this operation

can return valid data.

Bit 3 (0x08) Noise Floor with TX On - When requested the reader will transmit a CW signal on

each available logical antenna and report the noise floor detected in units equivalent

to the units returned for

Tag Read Meta Data RSSI value.

Returned value contains N bytes (N/2 on the M5e-Compact), Where N = the number

of valid logical antennas based on the

Antenna Ports configuration x 1 byte for each

antenna, in ascending antenna order.

Note: Multiple statistics can be requested by a single command by performing a binary OR (setting each

desired Statistics Flag bit to 1) on the desired flags and sending the result as the Statistics Flag byte.

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Thingmagic M5e-Compact Instrukcja Użytkownika Strona 183