• 4.3.1. Minimum Functionality Mode
  • Table 8: The current consumption of Minimum Functionality Mode (BS-PA-MFRMS=9) Current consumption(mA) (sleep mode)
  • SIM800HSIM800L_Hardware Design_V2.02 26 2015-07-27 Smart Machine Smart Decision
  • Figure 16: Reset timing sequence




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    Figure 16: Reset timing sequence 
    4.3. Power Saving Mode 
    SIM800H&SIM800L has two power saving modes: Minimum functionality mode and sleep mode. AT command 
    “AT+CSCLK=1”can be used to set SIM800H&SIM800L into sleep mode. AT command 
    “AT+CFUN=“ can be used to set SIM800H&SIM800L into minimum functionality. When 
    SIM800H&SIM800L is in sleep mode and minimum functionality mode, the current of module is lowest. 
    4.3.1. Minimum Functionality Mode 
    There are three functionality modes, which could be set by AT command “AT+CFUN=“. The command 
    provides the choice of the functionality levels =0,1,4. 
    z AT+CFUN=0: Minimum functionality. 
    z AT+CFUN=1: Full functionality (default). 
    z AT+CFUN=4: Flight mode (disable RF function). 
    Table 8: The current consumption of Minimum Functionality Mode (BS-PA-MFRMS=9) 
     
    Current consumption(mA) (sleep mode) 

    0.83 

    1.04 

    0.92 
    Minimum functionality mode minimizes the current consumption to the lowest level. If SIM800H&SIM800L 
    SIM800H&SIM800L_Hardware Design_V2.02 26 2015-07-27 


    Smart Machine Smart Decision 
    SIM800H&SIM800L_Hardware Design_V2.02 27 2015-07-27 
    is set to minimum functionality by “AT+CFUN=0”, the RF function and SIM card function will be disabled. In 
    this case, the serial port is still accessible, but all AT commands correlative to RF function and SIM card 
    function will not be accessible.
    For detailed information about AT command “AT+CFUN=“, please refer to document [1]
     
    4.3.2. Sleep Mode 1 (AT+CSCLK=1) 
    Customer can control SIM800H&SIM800L module to enter or exit the sleep mode (AT+CSCLK=1) by DTR 
    signal. When DTR is in high level and without interrupt (on air and hardware such as GPIO interrupt or data in 
    serial port), SIM800H&SIM800L will enter sleep mode automatically. In this mode, SIM800H&SIM800L can 
    still receive paging or SMS from network but the serial port is not accessible. 

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