Message Send Errors: Faster = More

Official Hardware MKR Family MKR WAN 1310
1

I am new to lora, not to Arduino. Trying to set up communication between a MKR WAN 1310 (mkrwan library) and an Arduino Wisgate Pro Gateway (firmware WisGateOS_2.1.4_ARDUINO). Side issue, I can only get the 1310 to connect to the gateway in public mode.

I built a test using the LoraSendandReceive example, I am trying to send dht22 data along with one analog reading to the gateway. The 1310 is connecting via OTAA and the gateway is running the onboard MQTT broker. Both the 1310 and the gateway are in the same room. The test ran about 100 message transmissions at different intervals, 10-40 seconds between messages. The faster I try to send, the fewer messages get through, see table below.

Interval Successful
10 sec 62% <-- zero success after 108 attempts
20 85%
30 93%
40 98%

I know lora is "slow" but this seems strange to me, what am I missing? Is there a way to have a higher success rate with a lower time interval?

2

I dont know the detail of the LoRaWAN software in the MKR WAN 1310, but a lot of LoRaWAN nodes include software that keeps the transmissions to the legal air time duty cycle, often 1%.

So maybe the MKR WAN 1310 is dropping transmision requests when you send them too often in order to keep your node legal.

Are you using TTN here, that might be different ?

3

Am creating a private network. Why does everything Lora seem to revolve around tnn? I am not OK with relying on a third party to act as an unnecessary middleman...especially one that requires credit card information for a "free" account.

The 1310 is sending the messages without issue, according to the serial monitor while it is running. The Wisgate appears to be ignoring a lot of the messages.

The Wisgate is very limiting as far as I can tell. The on-board MQTT server is limited to only CayenneLPP but only with one channel at a time...thus single sensors on each node. Is there a better option for a gateway?