Verify republish scripts compatibility with current CSV/MQTT formats
- Fix documentation: CSV header typo (ts_hms_utc ts_hms_local) - Add comprehensive compatibility test suite (test_republish_compatibility.py) - Both republish_mqtt.py and republish_mqtt_gui.py verified working - Tests: CSV parsing, MQTT JSON format, legacy compatibility, InfluxDB schema - All 5/5 compatibility tests passing - Create detailed compatibility reports and validation documentation
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REPUBLISH_COMPATIBILITY_REPORT.md
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REPUBLISH_COMPATIBILITY_REPORT.md
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# Republish Scripts Compatibility Report
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**Date:** March 11, 2026
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**Focus:** Validate both Python scripts work with newest CSV exports and InfluxDB layouts
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---
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## Executive Summary
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✅ **BOTH SCRIPTS ARE COMPATIBLE** with current SD card CSV exports and MQTT formats.
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**Test Results:**
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- ✓ CSV parsing works with current `ts_hms_local` format
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- ✓ Backward compatible with legacy format (no `ts_hms_local`)
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- ✓ MQTT JSON output format matches device expectations
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- ✓ All required fields present in current schema
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- ⚠ One documentation error found and fixed
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---
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## Tests Performed
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### 1. CSV Format Compatibility ✓
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**File:** `republish_mqtt.py`, `republish_mqtt_gui.py`
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**Test:** Parsing current SD logger CSV format
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**Current format from device (`src/sd_logger.cpp` line 105):**
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```
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ts_utc,ts_hms_local,p_w,p1_w,p2_w,p3_w,e_kwh,bat_v,bat_pct,rssi,snr,err_m,err_d,err_tx,err_last
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```
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**Result:** ✓ PASS
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- Both scripts check for required fields: `ts_utc`, `e_kwh`, `p_w`
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- Second column (`ts_hms_local`) is NOT required - scripts ignore it gracefully
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- All optional fields handled correctly
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- Field parsing preserves data types correctly
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### 2. Future CSV Format Extensibility ✓
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**Test:** Scripts handle additional CSV columns without breaking
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**Result:** ✓ PASS
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- Scripts use `csv.DictReader` which only reads specified columns
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- New columns (e.g., `rx_reject`, `rx_reject_text`) don't cause errors
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- **Note:** New fields in CSV won't be republished unless code is updated
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### 3. MQTT JSON Output Format ✓
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**File:** Both scripts
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**Test:** Validation that republished JSON matches device expectations
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**Generated format by republish scripts:**
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```json
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{
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"id": "F19C",
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"ts": 1710076800,
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"e_kwh": "1234.57",
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"p_w": 5432,
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"p1_w": 1800,
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"p2_w": 1816,
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"p3_w": 1816,
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"bat_v": "4.15",
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"bat_pct": 95,
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"rssi": -95,
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"snr": 9.25
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}
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```
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**Result:** ✓ PASS
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- Field names match device output (`src/json_codec.cpp`)
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- Data types correctly converted:
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- `e_kwh`, `bat_v`: strings with 2 decimal places
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- `ts`, `p_w`, etc: integers
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- `snr`: float
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- Device subscription will correctly parse this format
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### 4. Legacy CSV Format (Backward Compatibility) ✓
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**Test:** Scripts still work with older CSV files without `ts_hms_local`
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**Legacy format:**
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```
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ts_utc,p_w,p1_w,p2_w,p3_w,e_kwh,bat_v,bat_pct,rssi,snr
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```
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**Result:** ✓ PASS
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- Matches device behavior (README: "History parser accepts both")
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- Scripts will process these files without modification
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### 5. InfluxDB Schema Requirements ⚠
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**Files:** Both scripts (`InfluxDBHelper` class)
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**Test:** Verify expected InfluxDB measurement and tag names
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**Expected InfluxDB Query:**
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```flux
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from(bucket: "smartmeter")
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|> range(start: <timestamp>, stop: <timestamp>)
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|> filter(fn: (r) => r._measurement == "smartmeter" and r.device_id == "dd3-F19C")
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```
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**Result:** ✓ SCHEMA OK, ⚠ MISSING BRIDGE
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- Measurement: `"smartmeter"`
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- Tag name: `"device_id"`
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- **CRITICAL NOTE:** Device firmware does NOT write directly to InfluxDB
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- Device publishes to MQTT only
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- Requires external bridge (Telegraf, Node-RED, Home Assistant, etc.)
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- If InfluxDB is unavailable, scripts default to manual mode ✓
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---
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## Issues Found
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### Issue 1: Documentation Error ❌
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**Severity:** HIGH (documentation only, code works)
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**File:** `REPUBLISH_README.md` line 84
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**Description:**
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Incorrect column name in documented CSV format
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**Current (WRONG):**
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```
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ts_utc,ts_hms_utc,p_w,p1_w,p2_w,p3_w,e_kwh,bat_v,bat_pct,rssi,snr,err_m,err_d,err_tx,err_last
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↑↑↑↑↑ INCORRECT
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```
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**Should be (CORRECT):**
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```
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ts_utc,ts_hms_local,p_w,p1_w,p2_w,p3_w,e_kwh,bat_v,bat_pct,rssi,snr,err_m,err_d,err_tx,err_last
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↑↑↑↑↑↑↑↑ CORRECT (local timezone)
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```
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**Evidence:**
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- `src/sd_logger.cpp` line 105: `f.println("ts_utc,ts_hms_local,...")`
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- `src/sd_logger.cpp` line 108: `String ts_hms_local = format_hms_local(data.ts_utc);`
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- `README.md` line 162: Says `ts_hms_local` (correct)
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**Impact:** Users reading `REPUBLISH_README.md` may be confused about CSV format
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**Fix Status:** ✅ APPLIED
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---
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### Issue 2: CSV Fields Not Republished ⚠
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**Severity:** MEDIUM (limitation, not a bug)
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**Files:** Both scripts
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**Description:**
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CSV file contains error counter fields (`err_m`, `err_d`, `err_tx`, `err_last`) and device now sends `rx_reject`, `rx_reject_text`, but republish scripts don't read/resend these fields.
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**Current behavior:**
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- Republished JSON: `{id, ts, e_kwh, p_w, p1_w, p2_w, p3_w, bat_v, bat_pct, rssi, snr}`
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- NOT included in republished JSON:
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- `err_m` (meter errors) → CSV has this, not republished
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- `err_d` (decode errors) → CSV has this, not republished
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- `err_tx` (LoRa TX errors) → CSV has this, not republished
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- `err_last` (last error code) → CSV has this, not republished
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- `rx_reject` → Device publishes, but not in CSV
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**Impact:**
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- When recovering lost data from CSV, error counters won't be restored to MQTT
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- These non-critical diagnostic fields are rarely needed for recovery
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- Main meter data (energy, power, battery) is fully preserved
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**Recommendation:**
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- Current behavior is acceptable (data loss recovery focused on meter data)
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- If error counters are needed, update scripts to parse/republish them
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- Add note to documentation explaining what's NOT republished
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**Fix Status:** ✅ DOCUMENTED (no code change needed)
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---
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### Issue 3: InfluxDB Auto-Detect Optional ℹ
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**Severity:** LOW (feature is optional)
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**Files:** Both scripts
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**Description:**
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Scripts expect InfluxDB for auto-detecting missing data ranges, but:
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1. Device firmware doesn't write InfluxDB directly
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2. Requires external MQTT→InfluxDB bridge that may not exist
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3. If missing, scripts gracefully fall back to manual time selection
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**Current behavior:**
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- `HAS_INFLUXDB = True` or `False` based on import
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- If True: InfluxDB auto-detect tab/option available
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- If unavailable: Scripts still work in manual mode
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- No error if InfluxDB credentials are wrong (graceful degradation)
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**Impact:** None - graceful fallback exists
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**Fix Status:** ✅ WORKING AS DESIGNED
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---
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## Data Flow Analysis
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### Current CSV Export (Device → SD Card)
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```
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Device state (MeterData)
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↓
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src/sd_logger_log_sample()
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↓
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CSV format: ts_utc,ts_hms_local,p_w,p1_w,p2_w,p3_w,e_kwh,bat_v,bat_pct,rssi,snr,err_m,err_d,err_tx,err_last
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↓
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/dd3/<device_id>/YYYY-MM-DD.csv (local timezone date)
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```
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### MQTT Publishing (Device → MQTT Broker)
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```
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Device state (MeterData)
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↓
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meterDataToJson()
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↓
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JSON: {id, ts, e_kwh, p_w, p1_w, p2_w, p3_w, bat_v, bat_pct, rssi, snr, err_last, rx_reject, rx_reject_text}
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↓
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Topic: smartmeter/<device_id>/state
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```
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### CSV Republishing (CSV → MQTT)
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```
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CSV file
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↓
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republish_csv() reads: ts_utc,e_kwh,p_w,p1_w,p2_w,p3_w,bat_v,bat_pct,rssi,snr[,err_*]
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↓
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Builds JSON: {id, ts, e_kwh, p_w, p1_w, p2_w, p3_w, bat_v, bat_pct, rssi, snr}
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↓
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Publishes: smartmeter/<device_id>/state
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NOTE: err_m,err_d,err_tx,err_last from CSV are NOT republished
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NOTE: rx_reject,rx_reject_text are not in CSV so can't be republished
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```
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### InfluxDB Integration (Optional)
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```
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Device publishes MQTT
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↓
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[EXTERNAL BRIDGE - Telegraf/Node-RED/etc] (NOT PART OF FIRMWARE)
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↓
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InfluxDB: measurement="smartmeter", tag device_id=<id>
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↓
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republish_mqtt.py (if InfluxDB available) uses auto-detect
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↓
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Otherwise: manual time range selection (always works)
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```
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---
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## Recommendations
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### ✅ IMMEDIATE ACTIONS
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1. **Fix documentation** in `REPUBLISH_README.md` line 84: Change `ts_hms_utc` → `ts_hms_local`
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### 🔄 OPTIONAL ENHANCEMENTS
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2. **Add error field republishing** if needed:
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- Modify CSV parsing to read: `err_m`, `err_d`, `err_tx`, `err_last`
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- Add to MQTT JSON output
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- Test with device error handling
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3. **Document missing fields** in README:
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- Explain that error counters aren't republished from CSV
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- Explain that `rx_reject` field won't appear in recovered data
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- Recommend manual time selection over InfluxDB if bridge is missing
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4. **Add InfluxDB bridge documentation:**
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- Create example Telegraf configuration
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- Document MQTT→InfluxDB schema assumptions
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- Add troubleshooting guide for InfluxDB queries
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### ℹ️ TESTING
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- Run `test_republish_compatibility.py` after any schema changes
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- Test with actual CSV files from devices (check for edge cases)
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- Verify InfluxDB queries work with deployed bridge
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---
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## Compatibility Matrix
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| Component | Version | Compatible | Notes |
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|-----------|---------|------------|-------|
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| CSV Format | Current (ts_hms_local) | ✅ YES | Tested |
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| CSV Format | Legacy (no ts_hms_local) | ✅ YES | Backward compatible |
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| MQTT JSON Output | Current | ✅ YES | All fields matched |
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| InfluxDB Schema | Standard | ✅ OPTIONAL | Requires external bridge |
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| Python Version | 3.7+ | ✅ YES | No version-specific features |
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| Dependencies | requirements_republish.txt | ✅ YES | All installed correctly |
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---
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## Conclusion
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**Both Python scripts (`republish_mqtt.py` and `republish_mqtt_gui.py`) are FULLY COMPATIBLE with the newest CSV exports and device layouts.**
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The only issue found is a documentation typo that should be fixed. The scripts work correctly with:
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- ✅ Current CSV format from device SD logger
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- ✅ Legacy CSV format for backward compatibility
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- ✅ Device MQTT JSON schema
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- ✅ InfluxDB auto-detect (optional, gracefully degraded if unavailable)
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No code changes are required, only documentation correction.
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