sim800l gsm module response isn't completed

Question

I am using the sim800l gsm module with nodemcu esp8266 and comunicating with it using AT+ commands. The module is working correctly but I am trying to use the command AT+CLCC to get all the current calls' state but it responds with only the first call information and a part of the second call.

This is the response while there are two active calls

15:37:19.156 -> AT+CLCC
15:37:19.156 -> +CLCC: 1,0,1,0,0,"+0123456789",145,"name"
15:37:19.156 -> 
15:37:19.156 -> +CLCC: 2,

I think it is the Serial buffer's problem because the size of the serial buffer is 64 bytes and the response is more than that but I don't know how to handle that

I hope someone can help.

EDIT: this is the code i am using

#include <SoftwareSerial.h>
#include <cstring>
#include <Arduino.h>
#define simTX D3
#define simRX D4
SoftwareSerial sim800l(simRX, simTX);  //RX, TX
void setup() {
Serial.begin(115200);  //Begin serial communication with Arduino and Arduino IDE (Serial Monitor)
sim800l.begin(115200);  //Begin serial communication with Arduino and SIM800L
}
void loop() {
updateSerial();
}
//Start
// this method takes input from the serial monitor the pass it to sim800l via serial communication
void updateSerial() {
  delay(500);
  while (Serial.available()) {
    sim800l.write(Serial.read());  //Forward what Serial received to Software Serial Port
  }
  while (sim800l.available()) {
    Serial.write(sim800l.read());  //Forward what Software Serial received to Serial Port
  }
}
//End

score 2 · Accepted Answer · answered Jul 13 '23 at 21:56

Just for someone in the future who is having the same issue.

the problem was because of the boadrate 115200 is pretty fast for a software serial implementation so i just changed it to 9600

 sim800l.begin(9600);  //Begin serial communication with Arduino and SIM800L

good luck from the past :)

sim800l gsm module response isn't completed

1 Answers1