How can I put SIM800L in Power down mode with this library? about sim800l-arduino-library-revised HOT 10 OPEN

Well, I have not tried that because I am using a Mosfet to power down the alimentation of the module. I chose that because I need the lowest possible power consumption.

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setSleepMode(true) : Enable slow clock, it is controlled by DTR. When DTR is high, module can enter sleep mode. When DTR changes to low level, module can quit sleep mode.
setSleepMode(false) : Disable slow clock, module will not enter sleep mode.
This function uses AT+CSCLK=0/1 command. I think it won't sleep instantly.

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Does it work for you?

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I have a GSM module:
https://www.aliexpress.com/item/SIM800L-V2-0-5V-Wireless-GSM-GPRS-MODULE-Quad-Band-W-Antenna-Cable-Cap/32740662773.html?spm=2114.search0104.3.1.OIJpfe&ws_ab_test=searchweb0_0,searchweb201602_3_10152_10065_10151_10068_10171_10084_10083_10119_5370020_10080_10304_10307_10082_10081_10110_10137_10111_10302_10060_10112_10113_10155_10114_10154_10056_10055_10054_10310_10312_10059_100031_10099_10078_10079_10103_10073_10102_10120_10052_10053_10142_10107_10050_10051-10120,searchweb201603_1,ppcSwitch_5&btsid=a7f7c025-6aa0-47d7-83dc-1303b48a4f50&algo_expid=83089329-2e13-4fc9-8316-f143ed2b59af-3&algo_pvid=83089329-2e13-4fc9-8316-f143ed2b59af
Is it possible to put this into sleep?
And to receive SMS in sleep mode, after that, to retouch the arduino?

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If you want to put your module in sleep mode, use "setSleepMode(true)" method of the library. To wake up it, use "setSleepMode(false)". See Sim800L.cpp file for more details

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I would like to receive SMS in sleep mode as well, to awaken the arduino. Therefore disconnecting the GSM module with a mosfet is not good for me.
What i have a module for, the dtr pin does not get out, can it so much to suffocate the module?

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@berkesandor: I fail to set it to low power either. I have SIM800L (red PCB). I plan to connect DTR to the +4Vcc of the module, issue AT+CSCLK=1 and disconnect the TX wire from the serial port because it may leak current towards the MCU.
If this doesn't work, there's one more option - One guy from UK has reported that he got it to low power using CSCLK=2 mode. This mode does not need DTR pin but uses auto wakeup on RX here:
https://groups.google.com/forum/#!topic/reading-hackspace/8PwIo7imD0k

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Thank you @AGenchev

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Well, I have not tried that because I am using a Mosfet to power down the alimentation of the module. I chose that because I need the lowest possible power consumption.

@JuanHauara which MOSFET do you use? and is it connected to VCC or GND pin in SIM800L? Thank you

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Hello @yuliaretno96 and sorry for the delay. I am using the Si2301CDS, is channel P MOSFET so I connect it to the VCC pin.

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