Update hardware and firmware documentation for new modules and features
- Removed outdated TODOs and legacy references in hardware documentation. - Added details on the new CH32V203-based Sensor Module for CAN bus soil moisture sensors. - Documented updates to the Battery Management System (CH32V203-based) replacing the older bq34z100 design. - Refined sensor, pump, and power module descriptions with updated specifications. - Expanded firmware documentation to include Rust-based ESP32-C6 platform details, new OTA procedure, and MQTT telemetry topics. - Simplified toolchain setup and compilation process with updated scripts and instructions.
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@@ -6,23 +6,26 @@ description: "a description"
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tags: ["mqtt", "esp"]
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---
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# MQTT
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A configured MQTT server will receive statistical and status data from the controller.
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The PlantCtrl firmware publishes comprehensive status and telemetry data via MQTT when configured. The system uses the **mcutie** crate for Home Assistant integration and standard MQTT topics.
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### Topics
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| Topic | Example | Description |
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|-------|---------|-------------|
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| `firmware/address` | `192.168.1.2` | IP address in station mode |
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| `firmware/state` | `VersionInfo { ... }` | Debug information about the current firmware and OTA slots |
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| `firmware/state` | `{...}` | Debug information about the current firmware and OTA slots |
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| `firmware/last_online` | `2025-01-22T08:56:46.664+01:00` | Last time the board was online |
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| `state` | `online` | Current state of the controller |
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| `mppt` | `{"current_ma":1200,"voltage_ma":18500}` | MPPT charging metrics |
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| `battery` | `{"Info":{"voltage_milli_volt":12860,"average_current_milli_ampere":-16,...}}` | Battery health and charge data |
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| `water` | `{"enough_water":true,"warn_level":false,"left_ml":1337,...}` | Water tank status |
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| `plant{1-8}` | `{"sensor_a":...,"sensor_b":...,"mode":"TargetMoisture",...}` | Detailed status for each plant slot |
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| `pump{1-8}` | `{"enabled":true,"pump_ineffective":false,...}` | Metrics for the last pump activity |
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| `mppt` | `{"current_ma":1200,"voltage_ma":18500}` | MPPT charging metrics (current and voltage from solar panel) |
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| `battery` | `{"Info":{"voltage_milli_volt":12860,"state_of_charge":95,...}}` | Battery health and charge data from the BMS |
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| `water` | `{"enough_water":true,"warn_level":false,"left_ml":1337,...}` | Water tank status (level, temperature, frozen detection) |
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| `plant{1-8}` | `{"sensor_a":...,"sensor_b":...,"mode":"TargetMoisture",...}` | Detailed status for each plant slot including moisture sensors |
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| `pump{1-8}` | `{"enabled":true,"median_current_ma":500,...}` | Metrics for each pump output |
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| `light` | `{"enabled":true,"active":true,...}` | Night light status |
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| `deepsleep` | `night 1h` | Why and how long the ESP will sleep |
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| `deepsleep` | `night 1h` | Reason and duration of deep sleep |
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Note: The batteries `average_current_milli_ampere` field uses a placeholder value (1337) and should be updated with actual current sensor readings when available.
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### Data Structures
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@@ -39,14 +42,15 @@ Contains a debug dump of the `VersionInfo` struct:
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- `voltage_ma`: Solar panel voltage in mV
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#### Battery (`battery`)
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Can be `"Unknown"` or an `Info` object:
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- `voltage_milli_volt`: Battery voltage
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- `average_current_milli_ampere`: Current draw/charge
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- `design_milli_ampere_hour`: Battery capacity
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- `remaining_milli_ampere_hour`: Remaining capacity
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Can be `"Unknown"` or an `Info` object. The battery data comes from a custom BMS (Battery Management System) board that uses the CH32V203 microcontroller with I2C communication.
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- `voltage_milli_volt`: Battery voltage in millivolts
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- `average_current_milli_ampere`: Current draw/charge in milliamperes (placeholder: 1337)
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- `design_milli_ampere_hour`: Battery design capacity in milliampere-hours
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- `remaining_milli_ampere_hour`: Remaining capacity in milliampere-hours
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- `state_of_charge`: Charge percentage (0-100)
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- `state_of_health`: Health percentage (0-100)
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- `temperature`: Temperature in degrees Celsius
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- `state_of_health`: Health percentage (0-100) based onLifetime capacity vs design capacity
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- `temperature`: Battery temperature in degrees Celsius
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#### Water (`water`)
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- `enough_water`: Boolean, true if level is above empty threshold
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