Hi, I read the description, I think I can do it. But I have some question:
1. Is this a formal product? Or only used to collect data?
2. Why don't you use LoRa? long range, long battery life, low price, Support 1 to n.
3. Another way: us wifi module direct connect LSM9DS0 if don't need connect multi LSM9DS0 , It is more clearly solution.
I think we can find more clean solution.
I am expert in circuit design/pcb layout/mcu program. I have more than 19 years experiences. Please contact me, I think I can give you some suggestions.