Multi-Tech Systems CDMA Wireless Modem manual Analog Digital Converters Measurements +ADC

Chapter 14 – Specific AT Commands

Analog Digital Converters Measurements +ADC

Description: This command returns the current raw value of the specified ADC data item. Two external and four internal items can be queried.

	VBATT	Battery voltage (+Vbatt) being supplied to the Modem.
	THERM	Thermistor level (internal temperature) of the Modem.
	HDET	Internal test use only.
	ADC_0	External general-purpose user defined input (pin 33).
	ADC_1	External general-purpose user defined input (pin 38).
	ADC_CHG_MON	Battery charger monitor (CHG_IN).
Values:	<item>
	0: VBATT: 0 to 2.5 volts. Returned value = (+V_BAT*256)/(2.5*2.5) Range: 0-255
	1: THERM: 100 °C (68) to –40 °C (240). Returned value = (vt*256)/2.5 vt = -0.012*T +
	1.864 “T” is thermistor temperature in °Celsius. Range: 68-240 or
	-1.2288 °C per step.
	2: HDET: Internal use. Value range: 0-255
	3: ADC_0: 0 to 2.5 volts. Value = (Vadc*256)/2.5 Value range: 0-255
	4: ADC_1: 0 to 2.5 volts. Value = (Vadc*256)/2.5 Value range: 0-255
	5: ADC_CHG_MON: 0 to 4.2 volts. Value = (CHG_IN*256)/4.2 Value range: 0-255
Syntax:	Command syntax: AT+ADC=<item>
	Command		Possible Responses
	AT+ADC=0		+ADC: 211
	Note: Select VBATT		OK
			Note: raw value for VBATT (~2.29 volts)
	AT+ADC=1		+ADC: 94
	Note: Select THERM		OK
			Note: raw thermistor temperature (~34 ° C)
	AT+ADC=?		+ADC: (0-5)
	Note: Ask for the list of possible		Note: possible values 0 –5
	values
	AT+ADC?		+ADC: 1
	Note: Ask for the current item		OK
	selected		Note: THERM selected

Mobile Equipment Event Reporting +CMER

Description: This command enables or disables the sending of unsolicited result codes in the case of a key press.

Values:	<keyp> (keypad) :
	0: No keypad event reporting.
	1: Keypad events are reporting using the unsolicited response: +CKEV: <key>, <press>.
	See Chapter 3, Key Press or Release, for more information on +CKEV.
Syntax:	Command syntax: AT+CMER=<keyp>
	Command	Possible Responses
	AT+CMER?	+CMER: 0
	Note: Display current setting.	OK
		Note: Keypad event reporting disabled.
	AT+CMER=1	OK
	Note: Enable keypad event reporting.	Note: Keypad event reporting enabled.

Multi-Tech Systems, Inc. CDMA Wireless AT Commands - PN S000294C 96