The problems with SIM800l & Solutions


when I go to the shop to buy electronics components and when I ask for the GSM module, the shopkeeper gives me the most common sim800 series module which is good at a price but not good in performance, the problem comes one after another which I will discuss here and tell you how I overcome them and where I was stuck.

👀The Current Problem👀

when you buy the sim800 series module you will know that this module will not work with the Arduino power supply which has 5V and 3.3V and has 300-400mA current which is not good for this module
The module work with 3.4V to 4.4V approx and also need 2A current, which will help to generate the same frequency burst as the frequency using to connect Sim to the carrier. this work with quad-band like GSM850MHz, EGSM900MHz, DCS1800MHz, and PCS1900MHz.


this problem can be solved using a constant current power supply like using a cell/battery with over 2A current. or you can use any other power supply with 2A current minimum and using the voltage divider with 1ohm or less value resistor at R1 position because the resistor limits the current.
I used the cell/battery solution because I don't have a power supply and 1ohm resistor. but the sim not having a connection with the carrier.
I can only suggest that if your having a tight deadline then only invest the money with sim900 quadband (not in sim900A & sim900D because of the only dual-band) 

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