How to send more than 58bytes of data via the Ebyte E32

[moonman]

Hi, is there a way to send more than 58bytes of data through an Ebyte LoRa E32 1W module?

[Renzo Mischianti]

Hi moonman,
you can’t send more than 58byte in a single call, but if you use a structure with some packet instruction, you can manage It via software.

struct Packet {
	byte deviceId;
	byte msgId;
        byte[54] rawBinary;
        bool end;
};

with a similar structure, you can identify a sender device and the msgId, and you can rebuild the complete message in the server and use end == true to know if the stream was complete.

Bye Renzo

[moonman]

Thanks renzo, is there an actual arduino sketch with this example anywhere?

[Renzo Mischianti]

Hi moonman,
No sorry nothing of that.
Bye Renzo

[moonman]

Hi renzo, this is the code for both the reciever and transmitter can you tell me what exactly is wrong with it, I’m not sure I understood what you meant.

Transimitter – everything is based off of the sendFixedTransmissionStruct

void loop()
{
	delay(2500);
	struct Message {
	    char deviceId[5] = "TEMP";
	    char msgId[8] = "Kitchen";
	    char rawBinary[54] = "text text text text text text text text text text text";
      bool end;
	} message;

	ResponseStatus rs = e32ttl.sendFixedMessage(0,3,4,&message, sizeof(Message));
	Serial.println(rs.getResponseDescription());
}

Reciever

// The loop function is called in an endless loop
void loop()
{
	if (e32ttl.available()  > 1){

		ResponseStructContainer rsc = e32ttl.receiveMessage(sizeof(Message));
		struct Message message = *(Message*) rsc.data;
    while (message.end != true){
  
      Serial.println(message.deviceId);
      Serial.println(message.msgId);
      Serial.println(message.rawBinary);
      
    }
//		free(rsc.data);
		rsc.close();
	}
}

Thanks

[moonman]

Hi renzo, is there an example on how to send two different structs?

[moonman]

By that I mean two or more different 58byte structs.

Thanks moonman

[moonman]

Hi Renzo, hope I’m not bothering you but can you provide an answer. Not a lot of great resources online.

[Dusan]

With E32-900T30D module, it is not necessary to send messages with a maximum length of 58 bytes in individual packets. The module automatically splits packets when the length exceeds 58 bytes. Maximum possible lenght to send is up to 512 bytes. It is sufficient to change the #define MAX_SIZE_TX_PACKET in the library. Tested and working 🙂 Have a nice day!”

[Author]

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