First steps for Flask API, print returns a string instead of printing, get() function to get values as JSON array, serialize() function to get values as Python list object

enervent-ctrl-python/src/EnerventCoils.py

@@ -1,5 +1,6 @@
 import minimalmodbus
 import logging
+from flask import jsonify
 
 class EnerventCoil():
     """Single coil data structure"""
@@ -115,14 +116,27 @@ class Coils():
         return self.value(address, debug)
 
     def value(self, address, debug=False):
-        """Return local coil value"""
+        """Get single local coil value"""
         if debug: self.coillogger.debug("Reading coil value from cache")
         return self.coils[address].value
 
     def print(self, debug=False):
         """Human-readable print of all coil values"""
+        coilvals = ""
         for i, coil in enumerate(self.coils):
-            print(f"Coil {i}\t{coil.value} [{coil.symbol}] ({coil.description})")
+            coilvals = coilvals + f"Coil {i}\t{coil.value} [{coil.symbol}] ({coil.description})\n"
+        return coilvals
+
+    def serialize(self):
+        """Returns coil values as parseable Python object"""
+        coilvals = []
+        for coil in self.coils:
+            coilvals.append({"value": coil.value, "symbol": coil.symbol, "description": coil.description, "reserved": coil.reserved})
+        return coilvals
+
+    def get(self, live=False):
+        """Return all coil values in JSON format"""
+        return jsonify(self.serialize())
 
 class PingvinKL():
     """Class for communicating with an Enervent Pinvin Kotilämpö ventilation/heating unit"""

enervent-ctrl-python/src/enervent-logger.py

@@ -1,6 +1,7 @@
 #!/usr/bin/env python
 import logging
 from EnerventCoils import PingvinKL
+from flask import Flask
 
 VERSION = "0.0.1"
 DEBUG = False
@@ -13,9 +14,16 @@ logging.basicConfig(
     datefmt='%y/%m/%d %H:%M:%S'
     )
 
+pingvin = PingvinKL('/dev/ttyS0',1,debug=DEBUG)
+app = Flask(__name__)
+
+@app.route('/api/v1/coils')
+def index():
+    return pingvin.coils.get()
+
 if __name__ == "__main__":
     log.info(f"Starting enervent-logger {VERSION}")
-    pingvin = PingvinKL('/dev/ttyS0',1,debug=DEBUG)
-    print(pingvin.coils.value(1, debug=DEBUG))
-    print(pingvin.coils.fetchValue(1, debug=DEBUG))
-    print(pingvin.coils.print())
+    # print(pingvin.coils.value(1, debug=DEBUG))
+    # print(pingvin.coils.fetchValue(1, debug=DEBUG))
+    # print(pingvin.coils.print())
+    app.run(host='0.0.0.0',port=8888,debug=True)