fix(easee_cloud): stop reporting an old change time for steady power

CHANGELOG.md

@@ -1,5 +1,9 @@
 # Changelog
 
+## easee_cloud 1.3.3
+
+Omit `power_observed_at` when the power is unchanged since the last poll, so the host stamps the reading on arrival. Easee records TotalPower only when it changes, so a steady charge kept an old timestamp; FTW took it as a stale charger after three minutes and stopped the car every few minutes all night ([srcfl/ftw#1417](https://github.com/srcfl/ftw/pull/1417)). A new value still carries Easee's source time, and an offline charger (op_mode 0) still emits no sample.
+
 ## easee_cloud 1.3.2
 
 Restore the current session after restart even when Easee fills sessionEnd during a pause. Keep the ID when the car stops drawing; revoke it on a real unplug. Retain each measurement's source time and omit an old no-current reason while fresh charging power flows. Cloud offline state no longer reports a cable unplug.

SUPPORT_STATUS.md

@@ -46,8 +46,8 @@ Catalog source is not proof that a target can install or run a driver.
 | deye | 2.1.1 | blixt-l1 | not_assessed | — | — | not_recorded | — | not_assessed | no |
 | easee | 1.0.4 | ftw-core | not_assessed | — | — | not_recorded | — | not_assessed | no |
 | easee | 1.0.4 | blixt-l1 | not_assessed | — | — | not_recorded | — | not_assessed | no |
-| easee_cloud | 1.3.2 | ftw-core | not_assessed | — | — | not_recorded | — | not_assessed | no |
-| easee_cloud | 1.3.2 | blixt-l1 | not_assessed | — | — | not_recorded | — | not_assessed | no |
+| easee_cloud | 1.3.3 | ftw-core | not_assessed | — | — | not_recorded | — | not_assessed | no |
+| easee_cloud | 1.3.3 | blixt-l1 | not_assessed | — | — | not_recorded | — | not_assessed | no |
 | esphome-dsmr | 1.0.3 | ftw-core | not_assessed | 1.0.2 | — | not_recorded | — | not_assessed | no |
 | esphome-dsmr | 1.0.3 | blixt-l1 | not_assessed | — | — | not_recorded | — | not_assessed | no |
 | esphome_dsmr | 1.0.3 | ftw-core | not_assessed | — | — | not_recorded | — | not_assessed | no |

devices.yaml

@@ -349,7 +349,7 @@ manufacturers:
         protocols:
           - protocol: http
             driver: "easee_cloud"
-            version: "1.3.2"
+            version: "1.3.3"
             ders: [ev]
             control: true
         firmware_versions: ""

drivers/lua/easee_cloud.lua

@@ -25,7 +25,7 @@ DRIVER = {
   id           = "easee-cloud",
   name         = "Easee Cloud",
   manufacturer = "Easee",
-  version      = "1.3.2",
+  version      = "1.3.3",
   protocols    = { "http" },
   capabilities = { "ev" },
   description  = "Easee Home/Charge via Cloud REST API. No local protocol needed.",
@@ -282,6 +282,7 @@ local OBS_SESSION_START   = 223
 
 local OBS_IDS = "48,96,103,109,120,121,124,183,194,223"
 
+local last_power_observed_at = nil
 local validated_session_id = nil
 local observed_session_id = nil
 local departed_session_id = nil
@@ -599,6 +600,19 @@ function driver_poll()
     -- responsive even when no car is plugged in.
     local is_online = (op_mode ~= 0)
 
+    -- Easee records an observation only when its value changes, so a steady
+    -- charge keeps an old TotalPower timestamp; on hardware it stayed
+    -- unchanged for over five minutes. A new value carries its source time.
+    -- An unchanged one was confirmed by this poll of a charger the cloud
+    -- still hears from (get_observations rejects op_mode 0), so omit the
+    -- source time and let the host stamp the reading when it arrives.
+    local power_observed_at = timestamps[OBS_TOTAL_POWER]
+    if power_observed_at ~= nil and power_observed_at == last_power_observed_at then
+        power_observed_at = nil
+    else
+        last_power_observed_at = power_observed_at
+    end
+
     local reason_code = obs[OBS_REASON_NO_CUR]
     -- ReasonForNoCurrent describes a blocked offer. An older reason is not
     -- a current fault while the charger reports both charging and power.
@@ -673,9 +687,7 @@ function driver_poll()
         charging                = charging,
         request_active          = request_active,
         session_wh              = session_wh,
-        power_observed_at       = timestamps[OBS_TOTAL_POWER],
-        -- Two-minute source updates were observed on hardware. One minute
-        -- of margin bounds the power estimate without refreshing its time.
+        power_observed_at       = power_observed_at,
         power_max_age_s         = 180,
         energy_observed_at      = timestamps[OBS_SESSION_ENERGY],
         state_observed_at       = timestamps[OBS_OP_MODE],

drivers/tests/lua_harness/test_easee_cloud_power_time.lua

@@ -0,0 +1,36 @@
+dofile("drivers/tests/lua_harness/host_mock.lua")
+-- Easee records TotalPower only when it changes. A steady charge must not
+-- keep reporting that old change time as when the power was observed.
+local driver = "drivers/lua/easee_cloud.lua"
+host.reset()
+host._http_responses["/accounts/login"] = '{"accessToken":"test","expiresIn":3600}'
+host._http_responses["/config"] = '{}'
+host._http_responses["/sessions/ongoing"] = '{}'
+dofile(driver)
+driver_init({email="test@example.invalid",password="test",serial="TEST123"})
+
+local function poll(mode, power_kw, power_time)
+    host._http_responses["/observations?ids="] = host.json_encode({
+        {id=109,value=mode,timestamp="2026-09-25T00:21:00Z"},
+        {id=120,value=power_kw,timestamp=power_time},
+        {id=121,value=12.5,timestamp=power_time},
+    })
+    driver_poll()
+    local rows = host._emitted.ev
+    assert(rows and #rows > 0, "no EV sample")
+    return rows[#rows], #rows
+end
+
+local first = poll(3, 4.92, "2026-09-25T00:21:20Z")
+assert(first.power_observed_at == "2026-09-25T00:21:20Z", "a new value lost its source time")
+local steady = poll(3, 4.92, "2026-09-25T00:21:20Z")
+assert(steady.power_observed_at == nil,
+    "an unchanged value kept its old change time: " .. tostring(steady.power_observed_at))
+local changed = poll(3, 6.30, "2026-09-25T00:29:20Z")
+assert(changed.power_observed_at == "2026-09-25T00:29:20Z", "a changed value lost its source time")
+
+-- An offline charger (op_mode 0) emits no sample, so nothing looks fresh.
+local _, before = poll(3, 6.30, "2026-09-25T00:29:20Z")
+local _, after = poll(0, 6.30, "2026-09-25T00:29:20Z")
+assert(after == before, "an offline charger emitted a sample")
+print("Easee power time: passed")

drivers/tests/test_easee_cloud_power_time.py

@@ -0,0 +1,12 @@
+"""A steady Easee charge must not look like a stale power reading."""
+from pathlib import Path
+import subprocess
+
+
+def test_easee_cloud_reports_poll_time_for_steady_power():
+    root = Path(__file__).resolve().parents[2]
+    result = subprocess.run(
+        [str(root / "lua55"), "drivers/tests/lua_harness/test_easee_cloud_power_time.lua"],
+        cwd=root, text=True, capture_output=True, check=False,
+    )
+    assert result.returncode == 0, result.stdout + result.stderr

index.yaml

@@ -193,15 +193,15 @@ drivers:
     size_bytes: 4054
     sha256: "4a2cd1efb4a5583468ce897ebd88a000e348917295c40210e86ecf834c0ba543"
   - name: "easee_cloud"
-    version: "1.3.2"
+    version: "1.3.3"
     tier: core
     protocol: http
     connectivity: cloud
     setup: [vendor_portal]
     ders: [ev]
     control: true
-    size_bytes: 38746
-    sha256: "c0b1988b8aed68cf4c67034e0247f23133c33f4cba491e98d92131ce2332d578"
+    size_bytes: 39308
+    sha256: "1ae0b702197553df0075a649a161ecce57b2a3afe69322afa78edd585f112232"
   - name: "esphome-dsmr"
     version: "1.0.3"
     tier: community

manifests/easee_cloud.yaml

@@ -1,5 +1,5 @@
 name: "easee_cloud"
-version: "1.3.2"
+version: "1.3.3"
 tier: core
 author: "Sourceful Labs AB"
 protocol: http
@@ -16,9 +16,9 @@ tested_devices:
     notes: "Easee Home/Charge via Cloud REST API. No local protocol needed."
     min_driver_version: "1.0.1"
 min_host_version: "2.0.0"
-size_bytes: 38746
+size_bytes: 39308
 dkb_id: "easee_cloud"
-sha256: "c0b1988b8aed68cf4c67034e0247f23133c33f4cba491e98d92131ce2332d578"
+sha256: "1ae0b702197553df0075a649a161ecce57b2a3afe69322afa78edd585f112232"
 signature: ""
 
 bytecode_sha256: ""

support-status.json

@@ -590,7 +590,7 @@
     },
     {
       "catalog_source": true,
-      "catalog_version": "1.3.2",
+      "catalog_version": "1.3.3",
       "driver_id": "easee_cloud",
       "package_id": null,
       "targets": {