I currently have 9 irrometer sensors to measure the soil tension (kPa) in a sugar cane farm (see image). I am also taking these readings manually using a single arduino reader. So, each morning depending on the reading we decide if it’s time to irrigate the field.
I am new to the LoraWan tech, but I think this could be the best approach to take automatic readings, and we could display this data in a nice dashboard.
I want your advice in the setup I have in mind.
Gateway: WisGate Edge Max | RAK7249 Bundle 5 / 1pc 5.8dBi
The gateway will be placed were the marker is in the map. That is were we have the house and the Internet access.
About the installation of the gateway I have some questions:
Sugar Cane can get as high as 5 meters. The house isn’t that tall, so we are planing to install the gateway in a pole. Our farthest sensor is around 1.5km away from the house.
- How high do we have to install the gateway to get to a 1.5km away node?
- Is the 5.8dBi antenna enough? Or should I get the 8dBi. If I get the 8 dBi antenna, the recommendation is to install it with a feeder line cable which is 1.5m long. But I read that the longer the cable the higher the loss in dBi.
Nodes Arduino MKR 1310
The nodes will be placed in a IP67 case and will be powered using a battery. The idea is that the battery has to last for 13-15 months, so we only have to charge it once per harvest. These nodes will be placed in a pole, and the idea is to install the nodes at around 6 meters tall.
Do I need and external antenna for each node? or can I use the antenna included with the arduino 1310 and install it inside de plastic case?
Do I need to make these poles higher or is 6m enough?
I want to take readings every 15 minutes, and save them in to my database so I can make a dashboard with the data.
- Should I use TTN ? Or can the gateway send the data directly to a custom endpoint so I can consume the data as json in my own server?
Thank you for your feedback.