DevHeads IoT Integration Server•2y ago

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

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 ,...

ZacckOsiemo•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

kristof-at-embeetle•6/14/24, 3:29 PM

Oh, okay, I see it now. I was confused because the message was sent today, and Brandon says he can't host the meeting "tomorrow" - so that would point at Saturday.
I guess it's due to time zones.

Kkristof-at-embeetle Oh, okay, I see it now. I was confused because the message was sent today, and B...

nour_oud•6/14/24, 3:31 PM

Yes

DeFiDoM.XyZ•6/15/24, 9:11 AM

GM, fam. I'm JUST getting familiar with everything... Hoping to have my hardware back in the next week or so. Im grateful for the opportunity to learn from the best

DDeFiDoM.XyZ GM, fam. I'm JUST getting familiar with everything... Hoping to have my hardware...

techielew•6/15/24, 12:41 PM

Welcome. Let us know what you are interested in learning

techielew•6/16/24, 3:19 AM

@Event Pings, a little less than 12 hours to go until @Edison introduces us to DMA! Join https://discord.com/channels/1130679493799977062/1212286094830477323 Sunday at 15:00 GMT.

SageBoy•6/16/24, 3:42 AM

I am selected in buildspace in S5....

SageBoy•6/16/24, 3:43 AM

And I will make my project during this event.

SSageBoy I am selected in buildspace in S5....😁,

techielew•6/16/24, 4:10 AM

Congrats sageboy that’s great! What’s in the acceptance pack

Ttechielew Congrats sageboy that’s great! What’s in the acceptance pack 🤔

SageBoy•6/16/24, 4:13 AM

Oh!..it is a place where different ppl join and complete their goal in 6 weeks,

SageBoy•6/16/24, 4:13 AM

Acceptance pack have the instructions

SageBoy•6/16/24, 4:14 AM

https://www.youtube.com/live/5lE2iKsscAU?si=X48YyZ3Bxu2w86Gr

YouTubebuildspace

s5 kick off

SageBoy•6/16/24, 4:14 AM

I found out about this on Twitter and then i joined it and got selected.

SSageBoy https://www.youtube.com/live/5lE2iKsscAU?si=X48YyZ3Bxu2w86Gr

techielew•6/16/24, 2:04 PM

Keep us posted!

Ttechielew @Event Pings, a little less than 12 hours to go until @Edison introduces us to D...

techielew•6/16/24, 2:06 PM

Hey @Event Pings, we're going to start this week's Engineering Hour session in a little less than an hour at 15:00 GMT. @Edison will be explaining Direct Memory Access (DMA) on an STM32 and showing how you can leverage it to optimize your designs.

Join us in the Engineering Hour stage channel:
https://discord.gg/mZtsxJQ3ZY?event=1250671812329607218

Ttechielew Keep us posted!

SageBoy•6/16/24, 2:47 PM

Yeah!.. I have to choose a project which I am going to work on but I am confused, what should I choose , I have thought of an audio amplifier only with transistors no ic, a helium balloon control with esp, or a hand motion capture gloves. Idk what should I choose, do you have any other suggestions, i am a beginner btw