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Implement signed TQ EM power calculation #153

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Merged
tomquist merged 1 commit into from
Jun 28, 2025
Merged

Implement signed TQ EM power calculation #153

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42 changes: 34 additions & 8 deletions powermeter/tq_em.py
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Original file line number Diff line number Diff line change
Expand Up @@ -9,11 +9,26 @@ class TQEnergyManager(Powermeter):
"""Powermeter using the TQ Energy Manager JSON API."""

# OBIS codes
_TOTAL_KEY = "1-0:1.4.0*255" # Σ active power
_TOTAL_TO_GRID = 0
_TOTAL_FROM_GRID = 1
_TOTAL_KEYS = (
"1-0:1.4.0*255", # Σ active power (from grid)
"1-0:2.4.0*255", # Σ active power (to grid)
)

_TOTAL_TO_GRID_L1 = 0
_TOTAL_FROM_GRID_L1 = 1
_TOTAL_TO_GRID_L2 = 2
_TOTAL_FROM_GRID_L2 = 3
_TOTAL_TO_GRID_L3 = 4
_TOTAL_FROM_GRID_L3 = 5
_PHASE_KEYS = (
"1-0:21.4.0*255", # L1
"1-0:41.4.0*255", # L2
"1-0:61.4.0*255", # L3
"1-0:21.4.0*255", # L1 active power (from grid)
"1-0:22.4.0*255", # L1 active power (to grid)
"1-0:41.4.0*255", # L2 active power (from grid)
"1-0:42.4.0*255", # L2 active power (to grid)
"1-0:61.4.0*255", # L3 active power (from grid)
"1-0:62.4.0*255", # L3 active power (to grid)
)

_MAX_IDLE = 60 * 30 # 30 min
Expand All @@ -36,10 +51,21 @@ def get_powermeter_watts(self) -> List[float]:
self._login()
data = self._read_live_json()

if all(k in data for k in self._PHASE_KEYS):
return [float(data[k]) for k in self._PHASE_KEYS]
if self._TOTAL_KEY in data:
return [float(data[self._TOTAL_KEY])]
if any(k in data for k in self._PHASE_KEYS):
return [
float(data.get(self._PHASE_KEYS[self._TOTAL_TO_GRID_L1], 0))
- float(data.get(self._PHASE_KEYS[self._TOTAL_FROM_GRID_L1], 0)),
float(data.get(self._PHASE_KEYS[self._TOTAL_TO_GRID_L2], 0))
- float(data.get(self._PHASE_KEYS[self._TOTAL_FROM_GRID_L2], 0)),
float(data.get(self._PHASE_KEYS[self._TOTAL_TO_GRID_L3], 0))
- float(data.get(self._PHASE_KEYS[self._TOTAL_FROM_GRID_L3], 0)),
]

if any(k in data for k in self._TOTAL_KEYS):
return [
float(data.get(self._TOTAL_KEYS[self._TOTAL_TO_GRID], 0))
- float(data.get(self._TOTAL_KEYS[self._TOTAL_FROM_GRID], 0))
]

raise RuntimeError("Required OBIS values missing in payload")

Expand Down
69 changes: 63 additions & 6 deletions powermeter/tq_em_test.py
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Original file line number Diff line number Diff line change
Expand Up @@ -11,14 +11,18 @@ def test_three_phase(self, mock_get, mock_post):
# login GET
mock_get.side_effect = [
MagicMock(
status_code=200, json=lambda: {"serial": "123", "authentication": False}
status_code=200,
json=lambda: {"serial": "123", "authentication": False},
),
MagicMock(
status_code=200,
json=lambda: {
"1-0:21.4.0*255": 1,
"1-0:22.4.0*255": 0,
"1-0:41.4.0*255": 2,
"1-0:42.4.0*255": 0,
"1-0:61.4.0*255": 3,
"1-0:62.4.0*255": 0,
},
),
]
Expand All @@ -34,9 +38,13 @@ def test_three_phase(self, mock_get, mock_post):
def test_total_only(self, mock_get, mock_post):
mock_get.side_effect = [
MagicMock(
status_code=200, json=lambda: {"serial": "321", "authentication": False}
status_code=200,
json=lambda: {"serial": "321", "authentication": False},
),
MagicMock(
status_code=200,
json=lambda: {"1-0:1.4.0*255": 9, "1-0:2.4.0*255": 0},
),
MagicMock(status_code=200, json=lambda: {"1-0:1.4.0*255": 9}),
]
mock_post.return_value = MagicMock(
status_code=200, json=lambda: {"authentication": True}
Expand All @@ -50,13 +58,18 @@ def test_total_only(self, mock_get, mock_post):
def test_relogin_on_expired_session(self, mock_get, mock_post):
mock_get.side_effect = [
MagicMock(
status_code=200, json=lambda: {"serial": "123", "authentication": False}
status_code=200,
json=lambda: {"serial": "123", "authentication": False},
),
MagicMock(status_code=200, json=lambda: {"status": 901}),
MagicMock(
status_code=200, json=lambda: {"serial": "123", "authentication": False}
status_code=200,
json=lambda: {"serial": "123", "authentication": False},
),
MagicMock(
status_code=200,
json=lambda: {"1-0:1.4.0*255": 5, "1-0:2.4.0*255": 0},
),
MagicMock(status_code=200, json=lambda: {"1-0:1.4.0*255": 5}),
]
mock_post.side_effect = [
MagicMock(status_code=200, json=lambda: {"authentication": True}),
Expand All @@ -66,6 +79,50 @@ def test_relogin_on_expired_session(self, mock_get, mock_post):
meter = TQEnergyManager("192.168.0.11")
self.assertEqual(meter.get_powermeter_watts(), [5.0])

@patch("requests.Session.post")
@patch("requests.Session.get")
def test_missing_export(self, mock_get, mock_post):
mock_get.side_effect = [
MagicMock(
status_code=200,
json=lambda: {"serial": "111", "authentication": False},
),
MagicMock(
status_code=200,
json=lambda: {"1-0:1.4.0*255": 4},
),
]
mock_post.return_value = MagicMock(
status_code=200, json=lambda: {"authentication": True}
)

meter = TQEnergyManager("192.168.0.15")
self.assertEqual(meter.get_powermeter_watts(), [4.0])

@patch("requests.Session.post")
@patch("requests.Session.get")
def test_three_phase_missing_export(self, mock_get, mock_post):
mock_get.side_effect = [
MagicMock(
status_code=200,
json=lambda: {"serial": "777", "authentication": False},
),
MagicMock(
status_code=200,
json=lambda: {
"1-0:21.4.0*255": 1,
"1-0:41.4.0*255": 2,
"1-0:61.4.0*255": 3,
},
),
]
mock_post.return_value = MagicMock(
status_code=200, json=lambda: {"authentication": True}
)

meter = TQEnergyManager("192.168.0.16")
self.assertEqual(meter.get_powermeter_watts(), [1.0, 2.0, 3.0])


if __name__ == "__main__":
unittest.main()