SIM900AL
SIM900AL is a very compact size and SMT encapsulates the bi-frequency excited GSM wireless module.
Major features:
* double-frequency 900/1800 MHz
* meet GSM phase 2/2 + standard
-Class 4 (2 W @ 900 MHz)
Class 1-(1 W @ 1800 MHz)
* size: 24 * 24 * 3 mm
* weight: 3.4 g
* AT command (GSM 07.07, 07.05 and SIMCOM enhance AT command set)
* SIM application kit
* supply voltage range: 3.2... 4.8 V
* low power consumption 1.5 mA (sleep mode)
* operating temperature range:-20 ° C to + 60 ° C
FAX
* Group 3, class 1
SMS
* point-to-point MO and MT
* SMS community radio
* text mode and PDU mode
speech
* codec
-Half rate (HR)
-Full rate (FR)
-Enhanced Full rate (EFR)
* support echo suppression algorithm
* AMR
-Half rate (HR)
-Full rate (FR)
interface
* support SIM card 3 V / 1.8 V interface
* analog audio interface
* RTC
* SPI
* two road serial interface
* antenna welding plate
* the I2C
* GPIO
* PWM
* ADC
