LoRa.cpp LoRaClass::endPacket takes 4 seconds!

[emvee]

Hi, in the Heltec_ESP32_Dev-Boards library, the LoRaClass::endPacket() method in
Heltec_ESP32_Dev-Boards\src\lora\LoRa.cpp takes about 4 seconds (!!) to execute. the time is taken by the following code in the method:

while ((readRegister(REG_IRQ_FLAGS) & IRQ_TX_DONE_MASK) == 0) {
  yield();
 }

Can anything be done about this?

Thanks!!!

[emvee]

This may be an answer to the question (basically, yes, this is likely to be normal):

LoRa Delay (endPacket())

Yes it can definitely be much much longer than 500ms. 32 bytes of payload at SF12 is 1.8 seconds. Check out a LoRa Airtime calculator (first one I found…seems to work)