First commit

config.py

@@ -0,0 +1,4 @@
+WIFI_SSID = ""
+WIFI_PASS = ""
+MQTT_BROKER = ""
+MQTT_ID = "HAN01"

main.py

@@ -0,0 +1,106 @@
+import network
+import time
+import config
+from machine import Pin, UART, Timer
+from umqtt.simple import MQTTClient
+
+prefix = config.MQTT_ID + "/"
+
+led = machine.Pin("LED", machine.Pin.OUT)
+led.value(1)
+
+wlan = network.WLAN(network.STA_IF)
+wlan.active(True)
+wlan.connect(config.WIFI_SSID, config.WIFI_PASS)
+
+timer = Timer()
+
+while not wlan.isconnected() and wlan.status() >= 0:
+    print("Waiting to connect:")
+    time.sleep(1)
+    
+print("Connected!")
+led.value(0)
+
+client = MQTTClient(config.MQTT_ID, config.MQTT_BROKER,user=None, password=None, keepalive=300, ssl=False, ssl_params={})
+client.connect()
+client.publish(prefix + 'status', "connected")
+
+uart = machine.UART(0, 115200,invert=UART.INV_RX)
+
+def readUntil(uartObject, termination, maxlen=-1, includeTermination=True):
+    terminatedFlag=False
+    result = ''
+    while maxlen < 0 or len(result) < maxlen:
+        if uartObject.any():
+            result += chr(uartObject.read(1)[0])
+            for terminal in termination:
+                if result.endswith(terminal):
+                    terminatedFlag=True
+                    if not includeTermination:
+                         result = result[:-len(terminal)]
+                    break
+            if(terminatedFlag==True):
+                return result
+        time.sleep_us(10)
+    return result
+
+def parse_han_protocol(data):
+    data = data.replace("'b'", "")
+    data_list = data.split("\\r\\n")
+    data_dir = {}
+   
+    for line in data_list:
+        try:
+            if line.startswith("1-0:1.8.0"):
+                data_dir["kWh"] = str(float(line.split("(")[1].split("*")[0]))
+            if line.startswith("1-0:1.7.0"):
+                data_dir["kW"] = str(float(line.split("(")[1].split("*")[0]))
+            if line.startswith("1-0:21.7.0"):
+                data_dir["L1_kW"] = str(float(line.split("(")[1].split("*")[0]))
+            if line.startswith("1-0:41.7.0"):
+                data_dir["L2_kW"] = str(float(line.split("(")[1].split("*")[0]))
+            if line.startswith("1-0:61.7.0"):
+                data_dir["L3_kW"] = str(float(line.split("(")[1].split("*")[0]))
+        except:
+            pass
+        
+    return data_dir
+            
+data = ""
+
+while True:
+    led.value(0)
+
+    if uart.any():
+        led.value(1)
+        try:
+            rx_data = str(uart.readline())
+        except Exception as e:
+            print(e)
+            client.publish(prefix + "error", str(e).encode())
+
+        if "!" in rx_data:              
+            try:
+                data_dir = parse_han_protocol(data)
+                for key in data_dir:
+                    client.publish(prefix + key, data_dir[key].encode())
+            except Exception as e:
+                print(e)
+                client.publish(prefix + "error", str(e).encode())
+            
+            data = ""
+            
+        else:
+            try:
+                data = data + rx_data
+            except Exception as e:
+                print(e)
+                client.publish(prefix + "error", str(e).encode())
+               
+                
+
+        
+    
+    
+