Good day,
I've recently bought a SIM800L module. If there is no SIM card inserted the network LED blinks every 1 second. This indicates that it is searching for network. However, if the SIM card is inserted, the network LED blinks every 1 second for about 8 seconds and then it restarts. I have already tried several other SIM cards but to no avail.
What could be the possible problem? Please help.
Did you try the SIMs in a working cellular telephone?
Yes. Tried it already. Also tried all networks available in my country.
Do you have an antenna?
Yes. I have an antenna and I am using a 3A power supply to power the SIM800l module
Will you show how your SIM800L is connected? I read this on Arduino documents:
The SIM800L's VCC pin should be connected to the 3.3V pin on the Arduino board. Connecting it to the 5V pin may damage the module as it operates on 3.3V voltage level. It is important to ensure the voltage level is compatible with the module's specifications to avoid any damage.
The only networks you need to try are those that provide a 2g service. This is something you need to check, as there might not be any.
This is something that bothers me since the SIM card I am using is 5G enabled. Is there a way to program the SIM800l module to connect to a 2G network?
Based on the documentation that I got from the manufacturer, It has a 5V pin and a VCC. The 5V pin should be connected to an external power supply that supplies 2A and the VCC should be connected to the 5V of the Arduino.
Your problem is not a matter of connecting to a 2G network, your problem is about whether a 2G network exists. If you do have 2g, there is no need to ask the question.
If you have a separate VCC pin, it is probably for 3.6>4.4v. Connecting it to Arduino's 5v is probably a bad idea - not least because the required current is probably not available anyway.
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