User guide

WA_DEV_FEX20_UGD_002 Rev 004 March 08, 2011 110
Fastrack Xtend User Guide
Recommendations when Using the
Battery Accessory
15.4. Ni-MH Battery Level Reading
ADC1 is an internal signal of the Fastrack Xtend and is dedicated for measuring the battery accessory
voltage. From the ADC1value, a specific conversion is necessary to get the battery voltage.
The formula of the battery level to ADC1 reading (expressed in mV) is:
Battery voltage (Vbat) = 3.212 x ADC1 reading
For example, if ADC1 reading by AT command is 1218, then Vbat level = 3.212 x 1218 = 3912mV.
To read the battery level, use a communication software such as HyperTerminal and do the following:
 Enter AT+ADC?
 Press Enter
The Fastrack Xtend will respond with the following:
+ADC: XXXX,ADC1,XXX,XXX
OK
Refer to document [16] AirLink Fastrack Xtend Battery Accessory Product Technical Specification for
more information about reading the battery level status.
Note: This feature is not available in FXT004.
15.5. DC-IN Detection
GPIO1 is an internal signal of the Fastrack Xtend and is dedicated for DC-IN status monitoring. To
monitor the GPIO1 level, use a communication software such as HyperTerminal, and enter:
 AT+WIOM=1,“GPIO1”,0 to initially set GPIO1 as input
 AT+WIOR=“GPIO1” to read the status of GPIO1
Table 88. AT+WIOR in GPIO1 Responses
AT+WIOR Response
Description
+WIOR: 0
DC-IN is applied
+WIOR: 1
No DC-IN detected (using battery as power supply)
Refer to document [7] Firmware 7.4a AT Commands Manual (Sierra Wireless Software Suite
2.31)/Firmware 7.4 AT Commands Manual (Sierra Wireless Software Suite 2.30) for more information
regarding the AT+WIOR AT Command.
Refer to document [16] AirLink Fastrack Xtend Battery Accessory Product Technical Specification for
more information regarding the battery accessory.
Note: This feature is not available in FXT004.