Edge Collective

Test deployment of ultrasonic sensor and radio system in CT

An initial deployment of the ultrasonic sensor to measure water level in a homestead cistern.

---

Background

Maxbotic ultrasonic 7092 water depth sensor, sending data via LoRa radio to a Raspberry Pi, which then is posting data online to bayou.pvos.org and farmos via a python script.

Live data feed (as of Mar 26 2023)

http://bayou.pvos.org/data/6hs74zsv4ecj?plot_param=distance_meters

Images from the deployment

Python script for posting to FarmOS

import serial
import requests

# Define the serial connection.
ser=serial.Serial('/dev/ttyACM0')

# Read and convert data.
out=ser.readline()
a=eval(out)
b=a.decode("utf-8")
c=b.split(",")
depth_meters=c[0]
voltage=c[1]

# Send to farmOS.
 = 'XXXX'

url = 'https://test.farmos.dev/asset/1f86f3f4-be57-4e16-99f6-84290afd0a7d/data/basic?private_key=' + private_key

payload = {
  'depth_meters': depth_meters,
  'voltage': voltage
}
requests.post(url, json=payload)