Installation Video Guide
Watch the complete installation walkthrough before starting. The video covers probe placement, connector wiring, RS485 bus setup, and gateway commissioning.
HPzenAi Agri Soil Sensor — Complete Installation Walkthrough
Video coming soon
Walkthrough video will be added here
Tools Required
Gather these tools before starting. No specialist equipment is needed for a standard field installation.
Soil Auger or Dibber
To create a pilot hole in dense or stony soil for probe insertion
Flat-Head Screwdriver
For tightening RS485 and power terminal block connections at the gateway
Wire Strippers
To prepare cable ends before insertion into terminal blocks
Multimeter
To verify 12V DC supply voltage and RS485 cable continuity before power-on
Measuring Tape
To measure probe depth and confirm installation at the correct root zone depth
RS485 Shielded Twisted-Pair Cable
2-core shielded cable for RS485 communication from field to gateway — not included
Cable Conduit or Buried Duct
For protecting the sensor cable from mechanical damage and rodents in the field
What's in the Box
Verify all items are present before beginning installation. Contact support if anything is missing or damaged.
AGRI-SOIL-8F Probe
Stainless steel IP68 multi-parameter soil probe with 55 mm sensing element
Sensor Cable
5 m cable with 7-pin waterproof connector pre-attached to probe
RS485 Junction Box
Weatherproof field junction box for RS485 and 12V DC connections
Mounting Bracket
Stake-mount bracket for securing the junction box at field installation point
Installation Guide
Printed quick-reference card for probe placement, wiring, and commissioning
Probe Placement & Insertion
Correct probe placement at root zone depth in representative soil delivers accurate data for irrigation and fertilisation decisions. Take care to avoid air pockets, which are the most common cause of incorrect moisture readings.
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- 1Select a representative location — mid-row, away from irrigation emitters, fertiliser injection points, rocks, and field edges.
- 2Determine the target root zone depth for the crop (typically 15–30 cm for annual crops, 30–60 cm for perennial crops).
- 3For vertical installation: push the probe straight down into the soil to the full 55 mm probe depth.
- 4For angled installation at 45°: insert the probe at an angle to sample a larger soil volume around the root zone.
- 5In dense or stony soils, use a soil auger or dibber to create a pilot hole of the same diameter as the probe — this prevents bending.
- 6After insertion, press soil firmly back around the probe to eliminate air pockets — air gaps cause false low moisture readings.
- 7Ensure the 7-pin waterproof connector remains above soil level and is not submerged in standing water.
- 8Install 3–5 sensors per hectare for area-representative monitoring in large open fields.
Wiring & RS485 Connection
Connect the sensor to the HPzenAi Gateway via the junction box and RS485 shielded cable. Keep sensor cables separated from high-voltage irrigation pump wiring.
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- 1Route the 5 m sensor cable from the probe to the weatherproof junction box mounted on a field stake.
- 2Plug the 7-pin waterproof connector into the matching receptacle on the junction box — align the keyway and turn until locked.
- 3Run RS485 shielded cable from the junction box to the HPzenAi Gateway through conduit or buried cable duct.
- 4At the junction box, connect RS485 A (positive) and RS485 B (negative) to the terminal block.
- 5Connect the 12V DC supply: + to the sensor power terminal, − to GND.
- 6At the gateway, connect RS485 A to the gateway's RS485 A terminal and B to B.
- 7Connect the cable shield to earth at the gateway end only — do not earth the field end.
- 8If multiple sensors share one RS485 bus, daisy-chain A-to-A and B-to-B between junction boxes.
- 9Ensure each sensor has a unique Modbus address (factory default is 1; adjust via the sensor configuration tool or app).
Commissioning & Gateway Linking
After installation, commission the sensor by verifying live readings in the HPzenAi app and confirming all parameters are within expected ranges.
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- 1Apply 12V DC power to the sensor and confirm the gateway is online in the HPzenAi app.
- 2Open the HPzenAi app and navigate to Gateway → RS485 Scan.
- 3Wait for the scan to complete — the soil sensor should appear with its Modbus address.
- 4Tap the detected sensor and confirm Link to add it to your device list.
- 5Verify that all measured parameters appear on the sensor tile: moisture, temperature, EC, pH, N, P, K, salinity.
- 6Check that moisture reading is plausible for the current soil conditions — compare against a physical soil moisture check.
- 7Configure alert thresholds: Sensor → Settings → Irrigation Trigger and EC Alert levels.
- 8Set up automation rules if connected to a relay controller for automatic irrigation control.
Installation Checklist
Use this checklist before completing the installation or enabling irrigation automation.
- 1Probe inserted at correct root zone depth with no air pockets.
- 2Soil pressed firmly around probe after insertion.
- 3Probe connector above soil level and not submerged.
- 47-pin waterproof connector securely locked into junction box.
- 5Junction box mounted securely on field stake.
- 6RS485 A and B wired correctly — not swapped.
- 712V DC supply connected and junction box LED active (if fitted).
- 8Unique Modbus address confirmed for each sensor on the bus.
- 9Cable shielded and earthed at gateway end only.
- 10All parameters showing live data in HPzenAi app.
- 11Moisture and temperature readings checked against site conditions.
- 12Irrigation automation rules configured if applicable.
Important Installation Notes
Follow these precautions during installation and seasonal maintenance.
- 1Never bend or force the probe into hard or stony soil — use a pilot hole to avoid damage.
- 2Do not submerge the junction box or connector in standing water — IP65 is splash-proof, not submersion-rated.
- 3Inspect the 7-pin connector O-ring annually and replace if it shows signs of cracking or deterioration.
- 4In high-salinity soils, clean the probe with distilled water every 3–6 months to prevent EC drift from mineral deposits.
- 5Re-seat the probe after significant rainfall or soil settlement that may have created air pockets.
- 6Keep the RS485 cable run below 1000 m for reliable communication at 9600 baud.