SIM800L Troubleshooting guide (Solution when you have problem with SIM800L)

In this video, we will find a solution when we have difficulties using the SIM800L module. This SIM800Lmodule is really popular because of the price and size. But sometimes using this module is not that easy.
So this video will guide you to find the solution to your SIM800L problem.

SIM800L SMS and call tutorial :
SIM800L AT command list to access the internet :

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Full code of this tutorial you can find at :

Music :
"LAKEY INSPIRED - Chill Day" is licensed under a Attribution-ShareAlike 3.0 Unported (CC BY-SA 3.0)

[icestarkiller]

For anyone who wants to work with the SIM800L, make sure you disable your pincode of your sim. I forgot and it took me more then 12 hours to find this problem

[ultimatetutorials]

Oh god i have been looking for a solution for decades and finally i found it in this video. God bless you. You are the savior. Man you don't even know how grateful I am

[javieramayav]

My device "was not working" and I saw various troubleshooting videos and read various forums but it was untill yours that I could finally fix it or let's say, make it work... It was basically the PSU I was using it didn't have enough mA (2A) as indicated. I was using some LIPO batteries that seems don't have enough punch. So I solved it by having the correct PSU regarding Amps. Thanks for your supprt

[stephencarlm.calatrava]

By God's grace mine worked, the set-up I had though was using two 18650 batteries in series-so total voltage was around 7.4V, and used a buck converter stepping down the voltage to around 4V and connecting the output of the buck converter, directly towards the SIM800L Mini GSM module, I made sure that the wires I used was as short as I can enable and used AWG24 solid core copper wires, I did not use any capacitors, and everything worked fined, I even used 5G capable SIM card and it worked well with no problems; hopefully those working on this had theirs working, God Bless

[beautifulsmall]

Mine works great now Ive put the sim card in the right way round. Also a 1/4 wave ground plane antenna helps 83mm. great video. I would also recommend the AT command tester for Simcom modules GUI, for £10 its saved me hours.

[luismanuelvera]

Dude found my problem was the input voltage because of this video, thank you very very much!

[kukilp]

Thanks a bunch for the simplified tutorial. Good work. Mine was not working due to power. I was using a ICR18650 2200mAH battery. For some reason It was unable to deliver 2Amps. Then I switched to 9V-2A auto-ID adapter. Now it is working somehow. (surprisingly no overvoltage warning). I have to check the voltage today( forgot the multimeter at office).

[rishababadaseshi]

Thankyou so much brother
I have seen a lot a videos and articles about it some said 3.3v or 5v but as u said 4v i tried it and got it in first try ❤

[paulnnamdi]

If u know how great this video you made it, you would really be proud. Thanks a lot. This answered problem I have been working on for weeks. This video should have more likes. I have subscribed already.

[shoebislamhamim]

thank you so much. you're a life saver. I didn't connect the gnd of my power source to the GND of arduino earlier.

[alimoaz]

Man!!!!

You are so helpful. I was scratching my head for two days. But your video solved my problem

I have taken help from this link and followed the exact procedure mentioned in the video. Ultimately, it was a power issue. I was giving it 3.8 volt which was not sufficient. Then I changed it to 4.1 volts and it worked.

Again Thanks

[trustmeimanengineer]

Thank you so much. i have allready beleave that module is broken because i did insert wrong way simcard. OMG

[hiohio]

Hi, I've been following your video and checked everything. The voltage is around 4.1-4.3v but the led is still blinking every 1 second. AT+CREG is 0, 0 and can't send any message. Any idea why is this happening?

[Sekhar_Home]

Dear, i have tried everything like putting 3.7v lithium batter or put buck converter to the SIM800L, but never it got any network. however the sim info can get from AT command and CPIN is ready/ only CREG AND CSQ shows 0.. pls help me
Is there any chance that I bought an faulty SIM module?? pls tell how to check. The SIM can run fine in any 2g mobile in the home

[nameunknow]

i bought a sim800l module and i made it with nodemcu with 18650 lithium ion battery @ 4..2v the sim 800 module blinks 6 times and pauses a while and again 6 times and pauses please help

[forthingsotherpeoplecantkn]

My SIM800L doesn't respond to AT command. The serial monitor is simply blank

And the led blinks every 3 seconds wich means its connected to a network

I power it trough a lm2596 buck down converter with 4v, From 12v power suply

Can you help me ?

[abdillahjoiya]

LED is blinking after 3 seconds, means sim800l has been initialized. but no messages and calls are going.

[KonselorSekolah]

The tricky part about SIM800L is the power I think

[rejasnambiar]

See I am Using Sim800L module it was working absolutely fine, I have intersected the Activate sim, It was working fine no issue was their, Suddenly the gsm module, By using AT commands it shown that Sim not inserted, As I have correctly inserted, Voltage and Current are accurate, 4.4volts and 2 Ampere, I am not getting any solution

[XTomsenX]

I wasted one hour cause the second antenna (for the ufl connector) doesnt work. I got zero signal quality. I changed to the small helical antenna and now it works. Is it possible that the ufl connecter have to connect somewhere at the gsm shield? Or should both PINS (ufl connector and the pin for the helical antenna) ready to use? Thank u alot!