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How to check if SIM800L is working?
If the power to the SIM800L is enough, the on-board LED starts blinking. If it is blinking every second, this means it is searching for a network. You will know if it’s connected to the network when it blinks every three seconds. If the LED blinks very fast, this means it’s connected through GPRS.
Why there is a need of at CREG?
AT+CREG AT command gives information about the registration status and access technology of the serving cell.
How do I give a power supply to a GSM module?
Both 1.8 volts and 3.0 volts SIM Cards are supported by SIM900A – the SIM card voltage type is automatically detected.
- Assemble GSM Antenna to the modem.
- Connect serial cable to the modem.
- Give power supply in between 4.5V to 12V through the power jack provided.
- Default factory Baudrate is 9600.
What is the function of antenna which is connected with GSM module?
GSM: GSM functions
| •gsmAnswer | Answers an incoming voice call. |
|---|---|
| •gsmGetAntennaMode | Returns which antenna is selected and which antenna is used. |
| •gsmSignalLevel | Returns the signal level for the GSM connection. |
| •gsmSendPDU | Sends an SMS message as a binary PDU message. |
| •gsmIncomingPDU | Checks for incoming SMS binary PDU messages. |
What is Plmn LTE?
PLMN stands for Public Land Mobile Network. The LTE compliant UE is responsible for selecting a PLMN for subsequent cell selection. A PLMN is identified by its PLMN identity broadcast within SIB-1. A single cell can belong to multiple PLMNs, so SIB-1 may broadcast a list of PLMN identities.
How can I tell if my sim800l is connected to a network?
I decided to buy a battery online and it works wonderfully. If the power to the SIM800L is enough, the on-board LED starts blinking. If it is blinking every second, this means it is searching for a network. You will know if it’s connected to the network when it blinks every three seconds.
Which is the lowest signal strength for sim800l?
dBm is short for decibel per milliwatt and is a common unit for signal strength. -115 dbm is the lowest signal strength value and would typically mean that the SIM800L is on a network blind spot. -111 dBm is also a bad number for signal reception.
How big of battery do I need for sim800l?
Obviously, only when you the SIM800L is registered can you proceed with other functions like sending a SMS, making a call, or connecting to the internet via GPRS. Solution: Get a 3.7V LiPo battery with at least 1000 mAh rating. Use the schematic for this project.