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CHAPTER 4
Performing Advanced Functions
ID INFO rf_in rf_out date time ver clk stack cop batt temp days_uptime min:sec_uptime rssi pmp_low pmp_high type slot samples po err_level
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The formats for the above parameters are as follows:
•rf_in and rf_out as a decimal
•date as dd/mm/yyyy
•time as hh:mm:ss
•ver as x.x
•clk, stack, and cop as decimal; they represent internal housekeeping parameters and are implementation dependent (the A720 uses cop to number watchdog occurrences, but clk and stack are currently undefined for the A720; for the A723 clk returns the SST – Sensor Sampling Time value, default 2)
•batt as battery level using the standard voltage conversion equation (0 is 0 volts, 255 is 20 volts)
•temp as internal temperature in the A720 housing, which is device dependent. The precision of the sensing element is very low (±4°C), but it is sufficient for battery power management (charge/discharge). To compute the actual value (in °C), the following equation must be used:
1087
Temp = internalTem p • ----------- – 275
255
•days_uptime in days; together with min:sec_uptime, it represents the amount of time the device is up without a reset or watchdog
•min:sec_uptime in minutes:seconds format
•rssi as decimal; it is the programmed value with the RSSI command
•pmp_low and pmp_high are the programmed values with the PMP command
•type is used to represent the device type; following types are assigned currently:
—0 for A730MD
—1 for A720
—2 for A730SD
—3 for A720B
