Unanswered Questions
114 questions with no upvoted or accepted answers
4
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0
answers
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Arduino GSM receiving text and then storing value as a variable in code
I am using an Arduino Mega board with a SIM900 GSM.
My goal is to be able to text the GSM with a value of two digits (ex: 79) and then store that value as a variable in the code. I know how to set ...
3
votes
0
answers
280
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Sim800l doesn't respond to AT commands
My SIM800L doesn't respond to AT commands. The serial monitor is simply blank.
And the led blinks every 3 seconds which means it is connected to a network
I power it through an LM2596 buck down ...
- 544
3
votes
0
answers
1k
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GPRS/GSM SIM900 Shield not working with Arduino
I have a few questions related to GPRS/GSM SIM900 Shield not working with Arduino.
To keep it short I have a list of concrete questions:
Is the Arduino GSM library compatible with the Geeetech GPRS/...
- 31
3
votes
0
answers
2k
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How to control relay using SIM800 and Arduino Mega through SMS?
For my project I need to control relays through SMS and now I can send SMS from my SIM800 module which is connected to Arduino Mega R3. But I tried several shapes for AT commands to receive SMS and ...
- 15
3
votes
0
answers
1k
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how to detect the incoming message from sim800 GSM module
I am designing an motorcycle security system and I need to receive the message from the user.Hence i need to detect the incoming message and read the number and data from the message
- 31
3
votes
0
answers
6k
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Sending AT commands to a gprs shield using serial port
I have a GPRS shield connected to an arduino uno board, i want to use the shield to send sms and do phone calls, from a C# Wpf application, the arduino is connected to the application using the serial ...
- 131
3
votes
0
answers
1k
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(Arduino + official GSM shield + ultrasonic HC-SR04 sensor) inaccurate measuring
I'm using an Arduino Uno, 1.0.5 r2 version of the IDE with and ultrasonic HC-SR04 sensor for measuring a tank water level. I want to send the data obtained over internet using the official arduino GSM ...
- 2,522
3
votes
0
answers
442
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How can I open simultaneously 2 client socket connections with GSM shield?
How can I open simultaneously two socket connections with a GSM shield?
It seems that when I try to open the second connection, it is not opened, and additionally the first connection is closed.
...
- 53
2
votes
0
answers
163
views
Arduino Uno not interfacing with GSM SIM900A Module
I am using an Arduino Uno with a SIM900A module. I want to send a simple SMS but it is not working, as it either has no response in Serial monitor or there are reversed question marks. I have attached ...
- 1
2
votes
0
answers
737
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Can't Send Text Messages Using TinyGSM Module, but it works if I do it manually using the ESP-IDF Environment - Sim7600
I am using the following device: https://www.aliexpress.com/item/1005003152097545.html?spm=a2g0o.order_list.order_list_main.119.222218028PapM6
I am trying to make an IoT sound-measurer which will send ...
- 31
2
votes
0
answers
359
views
How to address +HTTPACTION:0,600,0 Not HTTP PDU response
I am using the SIM900A gsm module and trying to connect with my site using a GET request. My issue is that when submitting AT+HTTPACTION=0, I receive a status the response as +HTTPACTION:0,600,0. In ...
2
votes
0
answers
47
views
How can i tell the power status of a GSM900
What I am after is a reliable way of telling whether the GSM900 shield is powered up or not. "Obviously" the shield power is the constant green light. But i'm talking about the red light on the ...
- 21
2
votes
0
answers
2k
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Turn led on after ringing once, off after two rings when hung up SIM800
I'm trying to make something that has one led and a gsm module which is SIM800L, I'm using seeeduino GPRS library.
What I'm trying to do is that when I call the GSM module and hung up after ringing ...
- 2,522
2
votes
0
answers
315
views
GSM serial get event or read the whole input?
I am using an Arduino Uno with GSM shield, trying to read some SMS. Here is my code.
#include <SoftwareSerial.h>
SoftwareSerial SIM900(7, 8);
char incoming_char=0;
void setup()
{
Serial....
- 2,522
2
votes
0
answers
335
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No reply from GSM module
I have an arduino due sending and receiving data from a server using a GSM module (UBLOX SARA-U270). The issue I am having with it is that after a period of time working correctly the module stops ...
- 145