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sandeepmistry / arduino-LoRa

An Arduino library for sending and receiving data using LoRa radios.
MIT License
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Duplex extend transmission time or confirmation message #306

Closed tstanescu1 closed 4 years ago

tstanescu1 commented 4 years ago

First of all, thank you all for creating such a straightforward LoRa library, its really great!

I'm having an issue with the duplex, where not all packets get received from one LoRa device to another. I'm using it to control a relay, and some of the commands get dropped. I understand that when sending, the lora can't receive and vice versa. I was wondering if there is a command I could use to extend the air time of the packet in order to let the device loop through the code completely.

Or is there a way to confirm receipt with the duplex code?

IoTThinks commented 4 years ago

I may not get what you mean. It seems that you may need Receive callback to quickly go back to receive mode after sending a packet. https://github.com/sandeepmistry/arduino-LoRa/blob/master/examples/LoRaDuplexCallback/LoRaDuplexCallback.ino

Or you may need non-blocking sending packet to go gack to do other tasks immediately after sending a packet. https://github.com/sandeepmistry/arduino-LoRa/blob/master/examples/LoRaSenderNonBlocking/LoRaSenderNonBlocking.ino#L32

IoTThinks commented 4 years ago

I believe for packet confirmation / Acknowdgement, you need to write it yourself. Just reply "ok" with request id.

tstanescu1 commented 4 years ago

Thanks for your reply!

Could you please explain a bit how you would implement the receiver acknowledgment code on the receiver side? Would you add an if statement that would match the msg id? Or without the Ok the message would be sent again? I'd like it to be as seamless as possible.

I'm not very seasoned at programming.. yet. But with your help we could add an additional example in the library to confirm packet receipt. Thanks again!

IoTThinks commented 4 years ago

Sorry, I have no example for that. But the logic will be: Sender to send id:xx,msg:1234 Receiver to send back ack id:xx,msg:ok

If the id is matched, then Sender knows the message xx is received by receiver.

tstanescu1 commented 4 years ago

Thanks! I will see if I can implement it to my code, and add it to the examples list. Cheers!