some changes, meter reading works so far

src/pv_controller/MeterPublish.py

@@ -0,0 +1,48 @@
+from threading import Event
+from loguru import logger
+from MqttBase import AbstractMqttPublisher
+import json
+import datetime
+
+REGISTERS = [
+  { "addr":0x0048, "attr": "importEnergy", "name":"Import active energy", "unit":"kWh" },
+  { "addr":0x004a, "attr": "exportEnergy", "name":"Export active energy", "unit":"kWh" },
+  { "addr":0x000c, "attr": "activePower", "name":"Active power", "unit":"W" },
+  { "addr":0x0058, "attr": "positivePower", "name":"Positive power", "unit":"W" },
+  { "addr":0x005c, "attr": "reversePower", "name":"Reverse power", "unit":"W" },
+  { "addr":0x0000, "attr": "voltage", "name":"Voltage", "unit":"V" },
+  { "addr":0x0006, "attr": "current", "name":"Current", "unit":"A" }
+]
+
+
+class MeterPublish(AbstractMqttPublisher):
+    def __init__(self, config, modbusHandler):
+        super().__init__(config)
+        self.modbusHandler = modbusHandler
+        self.registers = REGISTERS
+
+    def localLoop(self):
+        cnt = 0
+        while not self.killBill:
+            cnt += 1
+            topic = self.config["meterPublishTopic"]
+            payload = str(cnt)
+
+            try:
+                payload = { r['attr']: 0.0 for r in self.registers }
+                payload['status'] = "Error"
+                payload['timestamp'] = datetime.datetime.isoformat(datetime.datetime.utcnow())
+                for reg in self.registers:
+                    v = self.modbusHandler.readInputRegister(reg['addr'])
+                    logger.info(f"{reg['name']}: {v} {reg['unit']}")
+                    payload[reg['attr']] = float(f"{v:0.2f}")
+                payload['status'] = "Ok"
+            except Exception as e:
+                logger.error(f"Caught exception: {str(e)}")
+
+            payload['cnt'] = cnt
+            payloadStr = json.dumps(payload)
+            self.client.publish(topic, payloadStr)
+            logger.warning(f"mqtt message sent: {topic} -> {payloadStr}")
+
+            self.killEvent.wait(timeout=float(self.config["meterPublishPeriod"]))