Lora 's packetLength?

[panosss]

I 've built a receiver with Arduino which uses the Lora library. With these settings:

frequency = 433E6;
SpreadingFactor = 12;
Bandwidth = 62.5E3;// 500E3;
CodingRate4 =4;
power=20;
SyncWord = 0xF3;

I 'm trying to make a sender based on STM32 that will send to the above mentioned receiver. One of the parameters for begin() is packetLength; So I want to set the packet length of the receiver the same as in sender (10). To be sure that there won't be any problem.

How do I set the packetLength in Lora library?

(maybe it has a different name like 'payload length' or something)

[IoTThinks]

Why you want that? Normally, we need packetLength so that receiver knows exact length of the packet. Without exact packetLength, the receiver doesn't know where the packet ends.

[panosss]

(I apologise for the delayed answer, I just now saw it) I need it because in the code it 's used, so I have to use it too.

int SX1278_LoRaEntryRx(SX1278_t * module, uint8_t length, uint32_t timeout) {
    uint8_t addr;

    module->packetLength = length;

    SX1278_defaultConfig(module);       //Setting base parameter

[IoTThinks]

If I understand your question correctly, you want to get the packetLength.

You can use callback. In callback method, you will have packetLength. https://github.com/sandeepmistry/arduino-LoRa/blob/master/examples/LoRaReceiverCallback/LoRaReceiverCallback.ino#L30

[szotsaki]

If I understand your question correctly, you want to get the packetLength.

Also an option to use my fork at https://github.com/szotsaki/arduino-LoRa. I have that API public under the name of getPayloadLength().