IoTThinks.com

You need a TTL RS485 in your Arduino. And USB RS485 in your PC. If you want to send raw data between them, you don't need Modbus protocol. Just use...

I have just checked. For AS923_2, unable to send uplinks for SF11BW125 and SF12BW125. I guess it should affect all frequency plans. I guess something is broken. Or the library...

This is the pull request. Yes, need to set Low data rate optimization for SF11/12 for AS923/AS923_2. I guess should be for all frequency plan. https://github.com/ElectronicCats/Beelan-LoRaWAN/pull/195

Mobus is a serial protocol. So everything needs to be one by one.

To MQTT inside ThingsBoard server.

To mitigate this #1

Ref: MQTT QoS https://www.hivemq.com/blog/mqtt-essentials-part-6-mqtt-quality-of-service-levels/

I haven't started doing this feature. The range is quite ok for me. Just put the gateway higher to have clear of sight.

Yeap, I'm thinking to implement message queues to store incoming/outgoing message messages. Then can re-send packets based on the queue.

Mitigated the RPC miss with LoRa receiving in core 1 alone. Need to add feature to track request / response id and re transmit if packet loss.