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Live dashboard: show what the car sends, compute pack energy

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The car publishes no battery, cabin or outside temperature and no pack
energy (checked against the fields that reached InfluxDB). Instead of
panels that stay empty:

- Battery temperature tile -> Climate setpoint.
- Outside temperature tile -> Last update ("2 minutes ago").
- Energy in pack = SOC x usable capacity, from the hidden dashboard
  constant usableKwh = 50.8 (51 kWh battery).
- Temperatures chart -> Battery voltage and current.

Checked with a simulated drive carrying exactly the car's fields: all
11 panels return data, energy matches 61 % x 50.8 kWh. SPECS.md lists
the missing signals and why.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01QLJfZQZeAKAwSqViTmLzki
This commit is contained in:
nils
2026-10-17 22:17:41 +02:00
co-authored by Claude Opus 5.5
parent f3de272c69
commit 582c084b35
2 changed files with 61 additions and 15 deletions
Download Patch File Download Diff File Expand all files Collapse all files
k8s/grafana/dashboards/live.json
+42 -15
View File
@@ -33,6 +33,14 @@
"current": {},
"hide": 0,
"sort": 1
},
{
"name": "usableKwh",
"label": "Usable battery capacity (kWh)",
"type": "constant",
"query": "50.8",
"hide": 2,
"description": "MG4 51 kWh battery: 50.8 kWh usable."
}
]
},
@@ -187,7 +195,7 @@
{
"id": 4,
"type": "stat",
"title": "Battery temperature",
"title": "Climate setpoint",
"datasource": {
"type": "influxdb",
"uid": "mg4-influxdb"
@@ -205,7 +213,7 @@
"type": "influxdb",
"uid": "mg4-influxdb"
},
"query": "from(bucket: \"mg4\")\n |> range(start: -30d)\n |> filter(fn: (r) => r._measurement == \"telemetry\" and r.installationId == \"${installationId}\" and r._field == \"batt_temp\")\n |> last()"
"query": "from(bucket: \"mg4\")\n |> range(start: -30d)\n |> filter(fn: (r) => r._measurement == \"telemetry\" and r.installationId == \"${installationId}\" and r._field == \"hvac_setpoint\")\n |> last()"
}
],
"fieldConfig": {
@@ -235,7 +243,7 @@
{
"id": 5,
"type": "stat",
"title": "Outside temperature",
"title": "Last update",
"datasource": {
"type": "influxdb",
"uid": "mg4-influxdb"
@@ -253,17 +261,16 @@
"type": "influxdb",
"uid": "mg4-influxdb"
},
"query": "from(bucket: \"mg4\")\n |> range(start: -30d)\n |> filter(fn: (r) => r._measurement == \"telemetry\" and r.installationId == \"${installationId}\" and r._field == \"ext_temp\")\n |> last()"
"query": "from(bucket: \"mg4\")\n |> range(start: -30d)\n |> filter(fn: (r) => r._measurement == \"telemetry\" and r.installationId == \"${installationId}\" and r._field == \"soc\")\n |> last()\n |> map(fn: (r) => ({_value: int(v: r._time) / 1000000}))"
}
],
"fieldConfig": {
"defaults": {
"unit": "celsius",
"unit": "dateTimeFromNow",
"color": {
"mode": "fixed",
"fixedColor": "#E0424C"
},
"decimals": 0
}
},
"overrides": []
},
@@ -278,7 +285,8 @@
"colorMode": "value",
"graphMode": "none",
"textMode": "value"
}
},
"description": "When the car last reported."
},
{
"id": 6,
@@ -301,7 +309,7 @@
"type": "influxdb",
"uid": "mg4-influxdb"
},
"query": "from(bucket: \"mg4\")\n |> range(start: -30d)\n |> filter(fn: (r) => r._measurement == \"telemetry\" and r.installationId == \"${installationId}\" and r._field == \"soe\")\n |> last()"
"query": "from(bucket: \"mg4\")\n |> range(start: -30d)\n |> filter(fn: (r) => r._measurement == \"telemetry\" and r.installationId == \"${installationId}\" and r._field == \"soc\")\n |> last()\n |> map(fn: (r) => ({_value: r._value / 100.0 * float(v: \"${usableKwh}\")}))"
}
],
"fieldConfig": {
@@ -326,7 +334,8 @@
"colorMode": "value",
"graphMode": "none",
"textMode": "value"
}
},
"description": "Computed: state of charge × usable capacity (dashboard constant usableKwh, 50.8 kWh for the 51 kWh battery). The car publishes no pack energy itself."
},
{
"id": 7,
@@ -527,7 +536,7 @@
{
"id": 10,
"type": "timeseries",
"title": "Temperatures",
"title": "Battery voltage and current",
"datasource": {
"type": "influxdb",
"uid": "mg4-influxdb"
@@ -545,12 +554,12 @@
"type": "influxdb",
"uid": "mg4-influxdb"
},
"query": "from(bucket: \"mg4\")\n |> range(start: v.timeRangeStart, stop: v.timeRangeStop)\n |> filter(fn: (r) => r._measurement == \"telemetry\" and r.installationId == \"${installationId}\" and (r._field == \"batt_temp\" or r._field == \"cabin_temp\" or r._field == \"ext_temp\" or r._field == \"hvac_setpoint\"))\n |> aggregateWindow(every: v.windowPeriod, fn: mean, createEmpty: false)\n |> keep(columns: [\"_time\", \"_field\", \"_value\"])"
"query": "from(bucket: \"mg4\")\n |> range(start: v.timeRangeStart, stop: v.timeRangeStop)\n |> filter(fn: (r) => r._measurement == \"telemetry\" and r.installationId == \"${installationId}\" and (r._field == \"voltage\" or r._field == \"current\"))\n |> aggregateWindow(every: v.windowPeriod, fn: mean, createEmpty: false)\n |> keep(columns: [\"_time\", \"_field\", \"_value\"])"
}
],
"fieldConfig": {
"defaults": {
"unit": "celsius",
"unit": "volt",
"custom": {
"lineWidth": 2,
"fillOpacity": 8,
@@ -558,7 +567,24 @@
"showPoints": "never"
}
},
"overrides": []
"overrides": [
{
"matcher": {
"id": "byRegexp",
"options": ".*current.*"
},
"properties": [
{
"id": "unit",
"value": "amp"
},
{
"id": "custom.axisPlacement",
"value": "right"
}
]
}
]
},
"options": {
"legend": {
@@ -568,7 +594,8 @@
"tooltip": {
"mode": "multi"
}
}
},
"description": "Traction battery. Current is negative while charging or regenerating."
},
{
"id": 11,