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how to interface LoRa 993 with stm32f401RE

vinayak
Associate II

‎2024-04-03 11:34 PM - edited ‎2024-04-03 11:47 PM

 

Body:

Hello STM community,

I'm currently working on a project where I need to interface a LoRa 993 module with an STM32F401RE microcontroller. However, I'm encountering some issues, and I could use some guidance from those experienced in this area.

I've followed the typical steps for hardware connection, ensuring proper wiring for power, ground, and communication lines (SPI, UART, etc.). However, despite my efforts, the setup doesn't seem to be functioning as expected.

Could anyone who has experience with LoRa modules and STM32 microcontrollers offer some advice or point me in the right direction? Specifically, I'm looking for:

  1. Recommendations on libraries or example codes specifically tailored for the LoRa 993 module and STM32F401RE.
  2. Suggestions on troubleshooting steps to identify and resolve any potential issues with the hardware or software configuration.
  3. Any insights or best practices you've learned from similar projects that might be helpful in this context.
  4. we have tried this code configureing  LoRa993 with stm32f401re 
  5. IN code its run until the ,// Set LoRa parameters
    uint8_t loraAddress = 22; // Change this to the desired LoRa address
  6. its not going next case
    LoRa_Status status = LoRa_ConfigureParameters(&huart2, loraAddress, 7, 125);
    if (status == LORA_OK) {
    printf("LoRa parameters configured successfully!\n");
    } else {

 

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Andrew Neil
Guru

‎2024-04-04 01:15 AM - edited ‎2024-04-06 01:53 AM

@vinayak wrote:

a LoRa 993 module

A what?

Do you mean this: https://reyax.com/products/RYLR993 ?

(always best to give a link so that we can see exactly what you're referring to)

 

@vinayak wrote:

3. Any insights or best practices you've learned from similar projects that might be helpful in this context.

 

It says it has an AT-Command interface.

With any AT-Command interface, the best way to start is by studying the AT Commands manual, and issuing commands manually & observing the responses on a terminal.

The above link has a document showing the use of the AT commands to connect to a Helium network.

Once you've gained experience with the commands & responses in the terminal, then - and only then - move on to thinking about embedded code.

Probably the biggest mistake people make in writing AT Command code is failing to observe and act upon the responses; eg,

 

 

 

send_command( "AT" );
delay_ms( 1000 );

send_command( "AT+JOIN=1" );
delay_ms( 5000 )

// now assume we have Joined ...

 

 

 

ie, just blindly sending commands and using arbitrary delays to assume that the command has completed successfully.

 

@vinayak wrote:

 

2. Suggestions on troubleshooting steps to identify and resolve any potential issues with the hardware or software configuration.

It is essential to have some means to observe both what the microcontroller is sending to the module and what the module is sending to the microcontroller - it's a two-way conversation!

https://www.avrfreaks.net/s/topic/a5C3l000000UaFXEA0/t153137?comment=P-1212903

It is useful to have something (some sort of RF analyser) that will at least show you when the module is transmitting.

Provide traces on a debug UART (or SWV) to show the state of your system, what it's doing, etc (this one's general).

 

Please use this button to properly post source code:

AndrewNeil_0-1712218668493.png

 

 

 

Andrew Neil
Guru

‎2024-04-04 01:44 AM - edited ‎2024-04-04 01:45 AM

Here's a tutorial - found by just googling "RYLR993":

https://github.com/UsefulElectronics/esp32c2-rylr993-battery-voltage-lorawan

It uses ESP32, but the AT Commands are platform-independent.

When looking for source code, a search of GitHub is always worth a try:

https://github.com/search?q=RYLR99&type=repositories

 

vinayak
Associate II
In response to Andrew Neil

‎2024-04-11 02:42 AM

I tried this but its not working I want to send a data to another receiver module to transmit the data i am not able to initialize the lora through stm32f401re  

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Andrew Neil
Guru
In response to vinayak

‎2024-04-11 02:49 AM - edited ‎2024-04-11 03:03 AM

So what, exactly, did you try?

And what results, exactly, did you get?

What debugging have you done to find out what's going wrong?

You asked for troubleshooting suggestions - so have you followed the ones I gave you?

Simply saying "it doesn't work" tells us nothing - you need to give details!

 

EDIT

In addition to the link I gave above to the post specifically on debugging serial comms, see also this post (further down in that same thread) on debugging in general:

https://www.avrfreaks.net/s/topic/a5C3l000000UaFXEA0/t153137?comment=P-1212908 

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