Initial content, migrated from the aml gateway rpi7-am-1

README.md

@@ -1,3 +1,13 @@
 # bar-detection
 
-Detects bars entering and leaving the oven and writes in-detect-oven / out-detect-oven
+Runs continuously, once a second. Detects a bar entering the oven on the rising edge of the
+entry photocell `Hin` (3) and writes a pulse to `in-detect-oven` (11). Detects a bar leaving
+when the reading it calls `THact` crosses above 600 and writes a pulse to `out-detect-oven`
+(12). Both outputs are i7state pulse signals, consumed by `bar-tracker`.
+
+**Known mismatch, kept as it runs today:** `signals.yml` maps id 17 to the name `THact`, but
+signal 17 is `THprocess`; the real `THact` is 18. The exit trigger therefore fires on
+`THprocess`. Correcting it means changing the id to 18 in `signals.yml` and tagging a new
+version.
+
+Runs in `docker.izazpi.cloud/aml/aml-python`; the version is in `schedule.yaml`.

bar_detection.py

@@ -0,0 +1,29 @@
+from i7lib.client import run
+
+prev_hin = 1.0
+prev_thact = 610.0
+
+
+def logic(plant):
+    global prev_hin, prev_thact
+
+    hin = plant.state.get("Hin", 0.0)
+    thact = plant.state.get("THact", 0.0)
+
+    batch = plant.new_write_batch()
+
+    if hin > 0 and prev_hin == 0:
+        batch.add(signal_id=11, value=1.0, name="in-detect-oven")
+
+    if thact > 600 and prev_thact <= 600:
+        batch.add(signal_id=12, value=1.0, name="out-detect-oven")
+
+    if batch.payload:
+        plant.send(batch)
+
+    prev_hin = hin
+    prev_thact = thact
+
+
+if __name__ == "__main__":
+    run(logic, interval_ms=1000, offset_ms=100)

schedule.yaml

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+name: bar-detection
+active: true
+schedule: "* * * * *"
+action: ensure
+runOnStartup: true
+imageName: docker.izazpi.cloud/aml/aml-python:0.1.0
+command: ["python", "/app/bar_detection.py"]
+maxCpuCores: 0.5
+maxMemoryMb: 128
+autoremove: false
+logOption: 1

signals.yml

@@ -0,0 +1,4 @@
+- { id: 3,  name: 'Hin',              read: 1, write: 0 }
+- { id: 17, name: 'THact',            read: 1, write: 0 }
+- { id: 11, name: 'in-detect-oven',   read: 0, write: 1 }
+- { id: 12, name: 'out-detect-oven',  read: 0, write: 1 }