Been a while since I worked with a SIM module, if I recall you may need an antenna?

ZacckOsiemoOP•6/10/24, 7:14 AM

i remember something like going outside my office or to my window for signal

Naren_QCOM•6/10/24, 9:22 AM

Does anybody worked on Quectel EC200 series SIM module for establishing an MQTT connection to the cloud/broker? @techielew

Naren_QCOM•6/10/24, 10:23 AM

AT+QMTCONN=0,"deployment-fc9b6ee2","chara","chara"

OK

+QMTCONN: 0,1

+QMTSTAT: 0,3

I'm getting the error like the above, but Ideally the response should be +QMTCONN:0,0,0

NNaren_QCOM AT+QMTCONN=0,"deployment-fc9b6ee2","chara","chara" OK +QMTCONN: 0,1 +QMTSTAT:...

Marvee Amasi•6/10/24, 11:41 AM

I have not tried this before , but it will be helpful to check out the Quectel EC200 series AT commands documentation for detailed explanations of the +QMTCONN and +QMTSTAT responses, particularly error codes like "3" so you can find specific troubleshooting steps for this particular error code

MMarvee Amasi I have not tried this before , but it will be helpful to check out the Quectel E...

Naren_QCOM•6/10/24, 1:09 PM

I've checked man, based upon the input, I made changes, even though, it is giving the same error.

If someone have any example code, it will be really helpful for me

nour_oud•6/10/24, 5:47 PM

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NNaren_QCOM I've checked man, based upon the input, I made changes, even though, it is givin...

Boss lady•6/10/24, 10:01 PM

#include <PubSubClient.h>
#include <QuectelMQTT.h>

const char* mqtt_server = "your_mqtt_server";
const int mqtt_port = 1883;
const char* mqtt_username = "your_username";
const char* mqtt_password = "your_password";
const char* mqtt_topic = "your_topic";

QuectelMQTT quectel_mqtt("your_apn", "your_username", "your_password", "your_simcard_pin");
WiFiClient espClient;
PubSubClient client(espClient);

void setup() {
  quectel_mqtt.PowerOn(); // Power on the Quectel module
  quectel_mqtt.InitializeGPRS(); // Initialize GPRS connection
  
  Serial.begin(115200);
  delay(100);
  
  WiFi.begin("your_ssid", "your_password"); // Connect to WiFi network
  
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  
  Serial.println("");
  Serial.println("WiFi connected");
  
  quectel_mqtt.InitializeMQTT(client, mqtt_server, mqtt_port, mqtt_username, mqtt_password); // Initialize MQTT connection
  quectel_mqtt.ConnectMQTT(client);
  }
  client.loop();
  
  // Publish a message to the MQTT broker
  char message[50];
  snprintf(message, 50, "Hello from Quectel SIM module!");
  client.publish(mqtt_topic, message);
  
  delay(5000); // Publish message every 5 seconds
}

#include <PubSubClient.h>
#include <QuectelMQTT.h>

const char* mqtt_server = "your_mqtt_server";
const int mqtt_port = 1883;
const char* mqtt_username = "your_username";
const char* mqtt_password = "your_password";
const char* mqtt_topic = "your_topic";

QuectelMQTT quectel_mqtt("your_apn", "your_username", "your_password", "your_simcard_pin");
WiFiClient espClient;
PubSubClient client(espClient);

void setup() {
  quectel_mqtt.PowerOn(); // Power on the Quectel module
  quectel_mqtt.InitializeGPRS(); // Initialize GPRS connection
  
  Serial.begin(115200);
  delay(100);
  
  WiFi.begin("your_ssid", "your_password"); // Connect to WiFi network
  
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  
  Serial.println("");
  Serial.println("WiFi connected");
  
  quectel_mqtt.InitializeMQTT(client, mqtt_server, mqtt_port, mqtt_username, mqtt_password); // Initialize MQTT connection
  quectel_mqtt.ConnectMQTT(client);
  }
  client.loop();
  
  // Publish a message to the MQTT broker
  char message[50];
  snprintf(message, 50, "Hello from Quectel SIM module!");
  client.publish(mqtt_topic, message);
  
  delay(5000); // Publish message every 5 seconds
}

Hope this helps

ZZacckOsiemo i remember something like going outside my office or to my window for signal

aymen ammari•6/10/24, 10:02 PM

I'm using 3 cm one but still the same problem

ZZacckOsiemo Been a while since I worked with a SIM module, if I recall you may need an anten...

Ben•6/11/24, 5:35 AM

Sim 900 has an antenna like thing

Aaymen ammari I'm new to arduino coding and we are tasked with making a smoke sensor that send...

Ben•6/11/24, 5:55 AM

Try using the serial monitor to see if you are actually getting value from the module, also check your pin configuration

Aaymen ammari I'm new to arduino coding and we are tasked with making a smoke sensor that send...

Ben•6/11/24, 5:55 AM

Test the sim module,

#include <SoftwareSerial.h>

//Create software serial object to communicate with SIM900
SoftwareSerial mySerial(7, 8); //SIM900 Tx & Rx is connected to Arduino #7 & #8

void setup()
{
//Begin serial communication with Arduino and Arduino IDE (Serial Monitor)
Serial.begin(9600);

//Begin serial communication with Arduino and SIM900
mySerial.begin(9600);

Serial.println("Initializing...");
delay(1000);

mySerial.println("AT"); //Handshaking with SIM900
updateSerial();
mySerial.println("AT+CSQ"); //Signal quality test, value range is 0-31 , 31 is the best
updateSerial();
mySerial.println("AT+CCID"); //Read SIM information to confirm whether the SIM is plugged
updateSerial();
mySerial.println("AT+CREG?"); //Check whether it has registered in the network
updateSerial();
}

void loop()
{
updateSerial();
}

void updateSerial()
{
delay(500);
while (Serial.available())
{
mySerial.write(Serial.read());//Forward what Serial received to Software Serial Port
}
while(mySerial.available())
{
Serial.write(mySerial.read());//Forward what Software Serial received to Serial Port
}
}
Once you have uploaded the sketch, open the serial monitor at baud rate 9600. You should see the output below on the serial monitor.

Ben•6/11/24, 5:56 AM

Aaymen ammari I'm new to arduino coding and we are tasked with making a smoke sensor that send...

Ben•6/11/24, 6:02 AM

I saw something please check it out

Ben•6/11/24, 6:02 AM

Aaymen ammari I'm new to arduino coding and we are tasked with making a smoke sensor that send...

wafa_ath•6/11/24, 10:40 AM

hi aymen ,
The SIM900A seems to be limited to Asia, and only compatible with 2G.
Have you check this limitations ?

Mahesh Kamble (EE)•6/11/24, 2:53 PM

Hiii

Mahesh Kamble (EE)•6/11/24, 2:53 PM

This is Mahesh Kamble completed the B.Tech in Electrical Engineering 2023 passout student

MMahesh Kamble (EE)This is Mahesh Kamble completed the B.Tech in Electrical Engineering 2023 passou...

Joseph Ogbonna•6/11/24, 3:35 PM

Do you have a project you are working on.

TIETIBIEKA Moussine•6/11/24, 4:39 PM

hello please someone can help/guide me for making quadcapter (components, code ,hardward circuit.....)

TTIETIBIEKA Moussine hello please someone can help/guide me for making quadcapter (components, code ,...

ZacckOsiemoOP•6/11/24, 6:29 PM

Start simple, it will take time. Break down what you need, what you need to learn and how you will learn it. The rest is really easily found on google.

BBen I saw something please check it out

aymen ammari•6/11/24, 6:36 PM

I already tryed multiple codes like this and non of them workd + pin configuration is correct just tx and rx

Wwafa_ath hi aymen , The SIM900A seems to be limited to Asia, and only compatible with 2G....

aymen ammari•6/11/24, 6:36 PM

Oohh I didn't know that, I'm situated in African, lemme check that maybe that's why

Ben•6/11/24, 6:37 PM

Check the sim module if it's actually working

aymen ammari•6/11/24, 6:37 PM

It's brand new

aymen ammari•6/11/24, 6:37 PM

Ordered it from aliexpress

Accur4te•6/12/24, 7:03 AM

need help related to using - use MAX485 TTL to RS485 Converter Module with esp32 to get convert value of rs485 output to serial and print it on serial port

Accur4te•6/12/24, 7:05 AM

i have a instrument with pinouts - rx,tx,com

Accur4te•6/12/24, 7:05 AM

followed this tutorial - https://circuitdigest.com/microcontroller-projects/rs485-serial-communication-between-arduino-uno-and-arduino-nano

RS485 Serial Communication between Arduino Uno and Arduino Nano

Accur4te•6/12/24, 7:06 AM

code -

Accur4te•6/12/24, 7:06 AM

#include <HardwareSerial.h>

#define DE_PIN 2 // GPIO pin connected to DE (Data Enable) and RE (Receiver Enable) pins of MAX485
#define RS485_SERIAL Serial2 // Define the Serial port used for RS485 communication

void setup() {
Serial.begin(9600); // Initialize serial monitor
RS485_SERIAL.begin(9600); // Initialize RS485 serial communication
pinMode(DE_PIN, OUTPUT); // Set DE pin as output
}

void loop() {
digitalWrite(DE_PIN, HIGH); // Enable transmission mode
if (RS485_SERIAL.available()) { // If data is available on RS485 port
while (RS485_SERIAL.available()) { // Read all available data
char c = RS485_SERIAL.read(); // Read character
Serial.print(c); // Print character to serial monitor
}
}
digitalWrite(DE_PIN, LOW); // Disable transmission mode
delay(100); // Delay before checking for new data
}

Accur4te•6/12/24, 7:06 AM

but i am not getting the output but the instrument is displaying its valus

Accur4te•6/12/24, 7:06 AM

i searched online some article told me about matching slave id and poles

Accur4te•6/12/24, 7:06 AM

but i don't know what to do

Accur4te•6/12/24, 7:07 AM

can anyone hel me out

AAccur4te i have a instrument with pinouts - rx,tx,com

Umesh Lokhande•6/12/24, 7:30 AM

Hi @accur4te If you don't mind could you tell us the exact instrument that you're trying to interface with ESP32 over RS485? Because you may need a salve ID/commands to communicate with the master microcontroller.

UUmesh Lokhande Hi @accur4te If you don't mind could you tell us the exact instrument that you'r...

Accur4te•6/12/24, 7:45 AM

its a flow meter

AAccur4te its a flow meter

Umesh Lokhande•6/12/24, 8:14 AM

I guess you'll find the details about addressing scheme or the format of the data packets, including how to address specific devices (slaves) on the bus. So that you can write code for esp32 to read flow meter data.

Accur4te•6/12/24, 10:37 AM

Okay I will give it a try

UUmesh Lokhande I guess you'll find the details about addressing scheme or the format of the dat...

Accur4te•6/12/24, 11:19 AM

can you tell how can i get started with it , i am confused about how should i do it.

Aaymen ammari Ordered it from aliexpress 😅

Ben•6/12/24, 11:34 AM

Ohk

AAccur4te #include <HardwareSerial.h> #define DE_PIN 2 // GPIO pin connected to DE (Data ...

Renuel Roberts•6/13/24, 3:02 PM

Your code doesn't show any handling for the RE try apply the logic in your code if it doesn't work then check the wiring if it's done properly

RRenuel Roberts Your code doesn't show any handling for the RE try apply the logic in your code ...

Accur4te•6/13/24, 5:35 PM

Okay got it

techielew•6/14/24, 7:22 AM

Hey @Event Pings,
Good news/bad news. Good news is we have another Engineering Hour coming up this Friday on getting started with Direct Memory Access (DMA) from @Edison @Edison_ngunjiri: https://discord.gg/7sJVtCyhSc?event=1250671812329607218. He'll be taking us from basic concept to real-world applications and of course a demo of memory to memory data transfers, here on Sunday, June 16th at 15:00 GMT. This is the first in a series towards timing, interrupts, and then OS-based design.

Now for the bad news, and sorry for the short notice—I've got a last-minute conflict so I won't be able to host Office Hours tomorrow morning, which breaks an almost 8-month streak! But don't get too down, as next Friday, June 21st, we'll be back in Office Hours at the usual time of 15:00 GMT to continue our exploration of Zephyr with @ZacckOsiemo. Again, you can access that through the server event listings.

Of course, as always, keep the collab going in the server!

kristof-at-embeetle•6/14/24, 3:03 PM

Hi,
I'm trying to log in on the meeting right now

kristof-at-embeetle•6/14/24, 3:03 PM

But can't find the link

kristof-at-embeetle•6/14/24, 3:06 PM

kristof-at-embeetle•6/14/24, 3:06 PM

I don't understand. Is there no meeting today?

kristof-at-embeetle•6/14/24, 3:07 PM

kristof-at-embeetle•6/14/24, 3:08 PM

It's now Friday 15:00 GMT,
so I thought there's a meeting...

Ttechielew Hey @Event Pings, Good news/bad news. Good news is we have another Engineering H...

nour_oud•6/14/24, 3:26 PM

@kmulier

#include <PubSubClient.h> #include <QuectelMQTT.h> const char* mqtt_server = "your_mqtt_server"; const int mqtt_port = 1883; const char* mqtt_username = "your_username"; const char* mqtt_password = "your_password"; const char* mqtt_topic = "your_topic"; QuectelMQTT quectel_mqtt("your_apn", "your_username", "your_password", "your_simcard_pin"); WiFiClient espClient; PubSubClient client(espClient); void setup() { quectel_mqtt.PowerOn(); // Power on the Quectel module quectel_mqtt.InitializeGPRS(); // Initialize GPRS connection Serial.begin(115200); delay(100); WiFi.begin("your_ssid", "your_password"); // Connect to WiFi network while (WiFi.status() != WL_CONNECTED) { delay(500); Serial.print("."); } Serial.println(""); Serial.println("WiFi connected"); quectel_mqtt.InitializeMQTT(client, mqtt_server, mqtt_port, mqtt_username, mqtt_password); // Initialize MQTT connection quectel_mqtt.ConnectMQTT(client); } client.loop(); // Publish a message to the MQTT broker char message[50]; snprintf(message, 50, "Hello from Quectel SIM module!"); client.publish(mqtt_topic, message); delay(5000); // Publish message every 5 seconds }