Hi it seems that my sim800l does not want to connect to network?
Is there something that i can check for?
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GSM sim800L
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Hi,
If your SIM800L GSM module is not connecting to the network, there could be several reasons for this issue. Let’s troubleshoot step by step:
- Power Supply and Wiring:
- Ensure that you provide sufficient power to the SIM800L module. It requires 3A current during network search.
- Connect the GND (ground) pin before the VCC (power) pin. Disconnection in the wrong order can lead to damage.
- Use a capacitor between the GND and VCC pins of the SIM800L, placed as close as possible to the module.
- Keep the wires short to minimize interference.
- Basic Connection:
- Connect your SIM800L to an Arduino Uno with the following connections:
- GND → GND
- VCC → 5V (Arduino)
- Tx → Rx
- RST → 3.3V
- Rx → Tx (Use a voltage divider to drop the voltage to 2.8V, as the module works best with this voltage.)
- Connect your SIM800L to an Arduino Uno with the following connections:
- Software Configuration:
- Use the following code snippet to initialize the SIM800L:
#include // Create software serial object to communicate with SIM800L SoftwareSerial mySerial(10, 11); // SIM800L Tx & Rx connected to Arduino pins 11 & 10 void setup() { // Begin serial communication with Arduino and Arduino IDE (Serial Monitor) Serial.begin(9600); // Begin serial communication with SIM800L mySerial.begin(9600); Serial.println("Initializing..."); delay(1000); mySerial.println("AT"); // Handshake test mySerial.println("AT+CSQ"); // Signal quality test mySerial.println("AT+CCID"); // Read SIM information mySerial.println("AT+CFUN=0"); // Turn off radio delay(5000); mySerial.println("AT+CFUN=1"); // Turn on radio delay(1000); mySerial.println("AT+CREG?"); // Check network registration } void loop() { // Update serial communication updateSerial(); } void updateSerial() { delay(500); while (Serial.available()) { // Handle incoming data from SIM800L } }
- Adjust the code according to your specific requirements.
- Use the following code snippet to initialize the SIM800L:
- Network Registration:
- Use the following AT commands to check network registration:
- AT+COPS?: Tells you which network operator your SIM is registered with.
- AT+CREG?: Checks the registration status (0 or 1 means registered).
- If not registered, perform network registration using AT+CREG=1.
- Use the following AT commands to check network registration:
- SIM Card Considerations:
- Ensure you use a compatible SIM card with the SIM800L.
- Insert the SIM card correctly.
- Enable PIN protection on your SIM card.
- Set the correct APN for your cellular network.
- Signal Strength:
- Move to a location with a strong cellular signal.
Remember to follow these steps carefully, and hopefully, your SIM800L will successfully connect to the network!