xg590 / sx1276 Goto Github PK

Hi, thank you for writing this code. I look forward to use it as a base for my LYLIGO Lora board. However I can't find any licensing information. Please could you tell me with what license do you release this code? I want to use it according to your wishes. Cheers.

I am trying to send REQ messages in a while loop to a receiver who receives the message and responds with some content. The REQs are not ACKed in my code.

My requester is

while True:
    if received_payload != None:
        print(received_payload)
    payload = "Node,3"
    print('[Sending]', payload)
    lora.send(dst_id=1, msg=payload, pkt_type=lora.PKT_TYPE['REQ']) # Sender's lora_id is 1 and receiver's is 0
    #Check and resend the message
    resend_count = 0
    print(lora.seq_num)
    while (int(lora.seq_num) != 0) and resend_count < 7:
        lora.send(dst_id=1, msg=payload, pkt_type=lora.PKT_TYPE['REQ'])
        print("Resending packet..."+str(resend_count))
        resend_count += 1
    time.sleep(0.05)

The receiver is

while True:
    lora.mode = 'RXCONTINUOUS'

    if received_payload != None:
        count = 0
        resend_count = 0
        
        try:
            if str((received_payload), 'UTF-8').startswith("Node"):
                print("REQ Message starts with a 'Node'")
                if len(message_list) > 0:
                    print("Sending this node's messages")
                    send_message = "Table,"  + str(message_JSON)
                    print(send_message)
                    lora.send(dst_id=3, msg=send_message, pkt_type=lora.PKT_TYPE['REQ'])
                    print(lora.seq_num)
                    while (int(lora.seq_num) != 0) and resend_count < 7:
                        lora.send(dst_id=3, msg=send_message, pkt_type=lora.PKT_TYPE['REQ'])
                        print("Resending Message..."+str(resend_count))
                        resend_count += 1
                        print(lora.seq_num)

                    if (int(lora.seq_num) != 0) and resend_count >= 7:
                        print("Message sending failed!")
                    else:
                        print("Message sent!")
                else:
                    print("This node's message list contains no entries. Sending nothing back.")
                        
        except:
            print("REQ Message Received But Payload Decode Error")
            
    sleep(0.03)

The receiver is receiving the REQ messages and is also sending the content. But somehow, the ACKs are not working.
What I found from the debug prints is that the REQ sender does not receive the ACK messages.

Is it possible to display the RSSI and SNR values?

#8 (comment)

is there a way i could set two different spreading factor and bandwidth for two LoRa modules operating on same MCU? I mean when SF 8 500khz for one LoRa and SF 10 and BW 125khz for another. is it possible?

Hello,
The example code has the following lines for the 914-916 MHz and 902-928 HMz.
I would like to modify the following line in the receiver and sender to set the frequency for hopping between 865.20 MHz and 868 MHz. How can I do that?

channels2Hopping = [914_000_000+200_000 * random.randint(0,10) for i in range(128)] # 914~916 MHz

channels2Hopping = [902_300_000+200_000 * random.randint(0,127) for i in range(128)] # 902~928 MHz

I have connected multiple nodes to the ESP32 and Lora isn't getting initialized. The interfaces are working fine.

Hello,

I have like material :

• 3 card ESP32 wrover dev
• 3 DFROBOT Firebeetle Covers - LoRa 867Mhz SX1276
• Sensors
• 2 Grove lora 868Mhz seeed SX1276
• 1 Gateway Indoor ( The things network gateway)

And i wish to know if the matérial are compatible with your solution to work with Micropython to create a LoRaWan Network

I have setup two or more nodes sending data to a single node. A lot of collisions occur and "PayloadCrcError" shows up. But why does it get stuck at this? In the image below, one node is sending a sequence number and "HelloWorld" and the other is sending "HelloWorld_1".

Also, is there a way to receive maximum data from multiple nodes?

Hello,

I am trying to send an object over LoRa using your sender and receiver scripts. I am getting a runtime error in line lora.send(dst_id=0, msg=payload, pkt_type=lora.PKT_TYPE['REQ']) .

The error says RuntimeError: no active exception to reraise. I have also tried to convert the object to a byte string,

I get the same error in both cases. I can print the object as a byte string.

The string is 538 characters long.

What I found out is that when the payload length is getting longer only then the error occurs. Is there any way to send this big payload?

I'd to like to perform FSK modulation on my hardware. it would be great if you show me how i could do that.

Hi,

Another feature that would be of great help is to set the number of retries to send a packet if the ACK is not received within the timeout.
Also, without ACK sending messages (not broadcasts), i.e., 'REQ' without ACK.

I have implemented two-way communication by defining a new packet type that builds on the "REQ" type. I'm quite not sure how to go about it.

How to fetch the source ID (ID of the sender of the message) from a received packet?

Can we do something like
def onBroadcast(self, packet, SNR, RSSI):
print("[New 'Discovery' packet]", src_id, packet, SNR, RSSI)``