Next step after using S-Soil MTEC-02B sensor in Milestone 2: Outdoor single sensor and saving telemetry data via Fledge software framework we will setup an framework where developers can add new sensors from scratch and build a new software stack to provide secure, private, zero-touch deployments to a subset of Edge Nodes (IoT devices) - we used RPi4 board for reference.
Deployments are distributed via completely customised Edge Server and can be deployed locally on developer workstation, in cloud infrastructure or on premises.
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- Build OS image with BSP distribution for Edge Node and save it to SD card. Insert SD card with BSP to RPi4 board and start controlling the board remotely.
[10 ~10 minutes] - Run local Edge Server on developer workstation with all needed services for software development and zero touch deployment.
[3 ~3 minutes]
- Connect/solder S-Soil MTEC-02B with USB to RS485 converter and insert into RPi4 board.
- Build a custom stack for S-Soil MTEC-02B to extract realtime data - Total Dissolved Solids (TDS), Temperature, Salinity, Volumetric Water Content (VWC) with python script, send data to Edge Server with Telegraf.
Deploy new stack remotely without touching the board to Edge Node (RPi4 board) from developer workstation.
Edge Server will collect data in InfluxDB and telemetry data will be available to display Grafana dashboard.
[4 ~4 minutes]
Prerequisites
Hardware
- Raspberry Pi4 model B 4GB+ RAM
- Industrial Soil Moisture & Temperature & EC Sensor MODBUS-RTU RS485 (S-Soil MTEC-02B)
- 16+ GB micro SD Card
- Power supply for Raspberry Pi 4
- SD card reader
- x64 PC (laptop or dedicated server)
- USB to RS485 converter (or similar like USB-RS485-WE-1800-BT)
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- Proprietary/open-source containerised services.
- Integrations with 3rd party PaaS/SaaS (AWS IoT, GCP IoT Core, Particle, etc.)
- More complex software frameworks (EdgeX, ORRA, Fledge, etc.) with own software updates and management tools.
Some open - source data exporters to consider are - telegraf, node-exporter, statsd, tcollector, collectd, cadvisor, promtail.
Stack can be single or multiple containerised services working together and incorporating designed business logic.
Steps to configure
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