Sim800l Ssl
Debra Necochea
Hello, I have a sim800l module here. The Power supply it requires says 3.4v to 4.5v. Normally I can do a diode off of the 5v and bring it down to 4.7v which is not bad. however I do not have any diodes at the moment. I'm unsure on what I can use for testing to make sure this module works. Also I would use an 18650 battery which would give me at full max 4.2v. I currently don't have any. Is there another way I can give it power without killing it off or using 5v? I have resistors and capacitors of all kinds but that is all.
If you mean powering the module from the Arduino's 5volt pin, then forget about it.
The module requires 2 Amp peak during transmit, which is too much for any Aduino or USB.
A LiPo battery is the only way.
Go to a place where they recycle old cellphones. The LiPo batteries in them are usually ok for short-lived experiments like this (the module will soon be obsolete).
Leo..
Before I plug these new components into my project, I want to make sure everything works properly. To do that, I connect the SIM800L dev board to my PC via an FTDI converter. In this case, I want to use a 3.3V FTDI converter. The FTDI converter will only have ground, TX, and RX connected.
I inserted this power supply and cellular chip into my ailing project and no power issues! When the thermal printer on the 9V power supply kicks in, there is little noise on the 4.2V supply. The project is still undergoing stress testing, but so far the 4.2 power supply and the SIM800L dev card have not had any issues.
Hi Dan. I am an occasional reader of your blog. I am pleased you have cleared your power problems, but as an experienced EE I want to let you know that I expect your power decoupling is marginal at the moment. The problem is the distances from decoupling caps to the load, and inherent inductance of the leads you are using.
A lot has been written on decoupling because bad power is the source of so many intermittent failures. I pulled up MT-101 from analog devices (a tutorial on decoupling) but there are many others by manufactures such as Linear Technology and Texas Instruments.
Thank you for this will try this out. I am not an expert but just trying out something. I have been having troubles with powering SIM800L this module via mobile battery (3.7v) the module is able to detect the SIM and all but for some reason its unable to send out messages. Its probably reseting itself i see blink approx for 5 sec
Thank you for detailed post, I will try out this as I am facing some strange problem that the this module is able to detect some of the AT commands do work ok but some of the SMS related AT commands error out.With SIM inserted the light blinks only for about 3-5sec and stop for a while and does it again. I am guessing that the module is getting restarted due to power problems as i am trying to power this module with my 3.7v Li mobile phone battery.
sir_g I m going to buy 2 battry of 2800mAh of 3.7v and thinking to connect in parallel circuit so pllz tell me that would it be better power supply for sim800l for start up and stand last for a day. And without using buck converter
It seems to work but I suppose there is a problem somewhere.
Moreover, I can see the RSSI which is updated every 5s, and sometimes, suddenly, it stops to be updated, if I reboot the esp32 it works again immediately, maybe a problem with the UART ?
I use ESP32 dev kit v1.0 , Sim800L Module and a 4.1V Power supply 3A
with reseting the both (ESP and Sim) every 24h automatically, it works fine but I am worried that it will hang before 24 hours!
Is it possible to explain your method (Monitor the RSSI signal) more clearly?
Also, I plan to work with an Ethernet module and connect with a network cable instead of Wi-Fi. Are you satisfied with the network module?
Do you have any problems with the connection and is it completely stable?
Thanks a lot.
Forgive me for asking such a beginner question
I confused with (sim800l_heartbit) , where did you define it?
I have a request to make of you (if possible), would you please send me whole code because I want to use the ethernet port section as well.
Hello, how are you all
I have problems connecting an evb sim800L with arduino mega, to Blynk
the truth is that I have seen and read several comments and I can not connect, I leave information on how to connect it, because it does not allow me to advance in my project
hello I live in Morocco, North Africa,
and the truth is that it did everything necessary to connect this and I do not achieve it, I have a mega file, and an ev8 sim800l, it works with 5v, the error message is
The max I was able to achieve to establish stable connection was around 38kbps with soft serial and my (already burnt) SIM900. It simply will not run at 115kbps. The other question is, why bother with Software Serial having Arduino Mega? You need to use one of the remaining UARTS (all three are for You to serve), and then even 250kbps is a safe speed (although not necessary for this connection)
MARVIN, THANK YOU
for your comment
the truth is that, it is difficult for me to know what you are saying but, you could tell me exactly what I have to put in the code for the, mega and where to make the connections
How are you powering this board? connecting to USB or Arduino 5V regulator might simply not work. use separate 5V 2A power supply It might work with 1A too, but SIMCOM recommends to use 2A
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