feat(itho-wpu): getsettings support

A loop around getsetting based on the settings available in the
database to retrieve all settings from the WPU.

Example usage:
> ./itho-wpu.py --action getsettings
> 0. Niet Gebruikt: 0 (min: 0, max: 65535, step: 1)
> 1. Hardware Configuratie: 70 (min: 0, max: 65535, step: 1)
> 2. Jaar Inbedrijfstelling: 2010 (min: 2004, max: 2099, step: 1)

README.md

@@ -99,6 +99,28 @@ See the [pislave](https://github.com/ootjersb/pislave#wiring) project
   ...
   ```
 
+* Retrieve a single setting from the WPU
+  ```
+  # ./itho-wpu.py --action getsetting --settingid 1
+  1. Hardware Configuratie: 70 (min: 0, max: 65535, step: 1)
+  ```
+
+* Retrieve all settings from the WPU
+  ```
+  # ./itho-wpu.py --action getsettings
+  0. Niet Gebruikt: 0 (min: 0, max: 65535, step: 1)
+  1. Hardware Configuratie: 70 (min: 0, max: 65535, step: 1)
+  2. Jaar Inbedrijfstelling: 2010 (min: 2004, max: 2099, step: 1)
+  3. Datum Van Inbedrijfstelling: 101 (min: 0, max: 3112, step: 1)
+  4. Max Handbedieningstijd (min): 0 (min: 0, max: 600, step: 1)
+  5. Vorsttemp (°C): 2.0 (min: -10.0, max: 10.0, step: 0.1)
+  6. Offset Voor Vorst Temp (K): 2.0 (min: 0.0, max: 10.0, step: 0.1)
+  7. Differentie Van Vorst Om Elektrisch Element Te Starten (K): 1.5 (min: 0.0, max: 10.0, step: 0.1)
+  8. Fout Reset Tijd (min): 120 (min: 1, max: 1440, step: 1)
+  9. Loginterval Tijd (sec): 5 (min: 1, max: 300, step: 1)
+  ...
+  ```
+
 # Exporting measurements
 
 ## InfluxDB

itho-wpu.py

@@ -23,6 +23,7 @@ actions = {
     "getserial": [0x90, 0xE1],
     "getdatatype": [0xA4, 0x00],
     "getdatalog": [0xA4, 0x01],
+    "getsetting": [0xA4, 0x10],
 }
 
 
@@ -33,9 +34,15 @@ def parse_args():
         "--action",
         nargs="?",
         required=True,
-        choices=actions.keys(),
+        choices=list(actions.keys()) + ["getsettings"],
         help="Execute an action",
     )
+    parser.add_argument(
+        "--settingid",
+        nargs="?",
+        type=int,
+        help="Setting identifier",
+    )
     parser.add_argument(
         "--loglevel",
         nargs="?",
@@ -75,7 +82,7 @@ class IthoWPU:
         self.datatype = self.get("getdatatype")
         self.heatpump_db = db.sqlite("heatpump.sqlite")
 
-    def get(self, action):
+    def get(self, action, identifier=None):
         if not self.no_cache:
             response = self.cache.get(action.replace("get", ""))
             if response is not None:
@@ -93,7 +100,7 @@ class IthoWPU:
         if not self.slave_only:
             master = I2CMaster(address=0x41, bus=1, queue=self._q)
             if action:
-                response = master.execute_action(action)
+                response = master.execute_action(action, identifier)
                 logger.debug(f"Response: {response}")
             master.close()
 
@@ -150,6 +157,36 @@ class IthoWPU:
                 return datalog
         return datalog
 
+    def get_settings(self):
+        listversion = self.get_listversion_from_nodeid()
+        parameterlist_version = self.heatpump_db.execute(
+            f"SELECT parameterlist FROM versiebeheer WHERE version = {listversion}"
+        )[0]["parameterlist"]
+        if parameterlist_version is None or not type(parameterlist_version) == int:
+            logger.error(f"Parameterlist not found in database for version {listversion}")
+            return None
+        settings = self.heatpump_db.execute(
+            "SELECT id, name, min, max, def, title, description, unit "
+            + f"FROM parameterlijst_v{parameterlist_version}"
+        )
+        return settings
+
+    def get_setting_by_id(self, settingid):
+        listversion = self.get_listversion_from_nodeid()
+        parameterlist_version = self.heatpump_db.execute(
+            f"SELECT parameterlist FROM versiebeheer WHERE version = {listversion}"
+        )[0]["parameterlist"]
+        if parameterlist_version is None or not type(parameterlist_version) == int:
+            logger.error(f"Parameterlist not found in database for version {listversion}")
+            return None
+        setting_details = self.heatpump_db.execute(
+            "SELECT name, min, max, def, title, description, unit "
+            + f"FROM parameterlijst_v{parameterlist_version} WHERE id = {settingid}"
+        )
+        if len(setting_details) != 1:
+            return None
+        return setting_details[0]
+
 
 class IthoWPUCache:
     def __init__(self):
@@ -219,6 +256,8 @@ def process_response(action, response, args, wpu):
             from itho_export import export_to_influxdb
 
             export_to_influxdb(action, measurements)
+    elif action == "getsetting":
+        process_setting(response, wpu)
     elif action == "getnodeid":
         process_nodeid(response)
     elif action == "getserial":
@@ -259,36 +298,114 @@ def process_datalog(response, wpu):
     measurements = {}
     for d in datalog:
         if d.type == 0x0 or d.type == 0xC:
-            m = message[d.index : d.index + 1]  # noqa: E203
-            num = int(m[0], 0)
-        elif d.type == 0x10:
-            m = message[d.index : d.index + 2]  # noqa: E203
-            num = (int(m[0], 0) << 8) + int(m[1], 0)
-        elif d.type == 0x12:
-            m = message[d.index : d.index + 2]  # noqa: E203
-            num = round((int(m[0], 0) << 8) + int(m[1], 0) / 100, 2)
-        elif d.type == 0x90:
-            m = message[d.index : d.index + 2]  # noqa: E203
-            num = (int(m[0], 0) << 8) + int(m[1], 0)
-            if num >= 32768:
-                num -= 65536
-        elif d.type == 0x92:
-            m = message[d.index : d.index + 2]  # noqa: E203
-            num = (int(m[0], 0) << 8) + int(m[1], 0)
-            if num >= 32768:
-                num -= 65536
-            num = round(num / 100, 2)
+            length = 1
+        elif d.type == 0x10 or d.type == 0x12 or d.type == 0x90 or d.type == 0x92:
+            length = 2
         elif d.type == 0x20:
-            m = message[d.index : d.index + 4]  # noqa: E203
-            num = (int(m[0], 0) << 24) + (int(m[1], 0) << 16) + (int(m[2], 0) << 8) + int(m[3], 0)
+            length = 4
         else:
-            logger.error(f"Unknown message type for datalog {d.name}: {d.type}")
+            logger.error(f"Unknown message type for datalog {d.label}: {d.type}")
+        num = format_datatype(d.label, message[d.index : d.index + length], d.type)  # noqa: E203
         logger.info(f"{d.description}: {num}")
         measurements[d.label] = num
     return measurements
 
 
-if __name__ == "__main__":
+def process_setting(response, wpu):
+    message = response[5:]
+
+    settingid = int(message[17], 0)
+    setting = wpu.get_setting_by_id(settingid)
+    if setting is None:
+        logger.error(f"Setting '{settingid}' is invalid")
+        return
+
+    datatype = message[16]
+    value = format_datatype(setting["name"], message[0:4], datatype)
+    minimum = format_datatype(setting["name"], message[4:8], datatype)
+    maximum = format_datatype(setting["name"], message[8:12], datatype)
+    step = format_datatype(setting["name"], message[12:16], datatype)
+    logger.info(
+        "{}. {}{}: {} (min: {}, max: {}, step: {})".format(
+            settingid,
+            setting["title"].title(),
+            f' ({setting["unit"]})' if setting["unit"] is not None else "",
+            value,
+            minimum,
+            maximum,
+            step,
+        )
+    )
+
+
+def process_settings(wpu, args):
+    settings = wpu.get_settings()
+    for setting in settings:
+        response = wpu.get("getsetting", int(setting["id"]))
+        if response is not None:
+            process_response("getsetting", response, args, wpu)
+
+
+def format_datatype(name, m, dt):
+    num = None
+    if type(dt) is str:
+        dt = int(dt, 0)
+
+    if dt == 0x0 or dt == 0xC:
+        num = int(m[-1], 0)
+    elif dt == 0x1:
+        num = round(int(m[-1], 0) / 10, 1)
+    elif dt == 0x2:
+        num = round(int(m[-1], 0) / 100, 2)
+    elif dt == 0x10:
+        num = (int(m[-2], 0) << 8) + int(m[-1], 0)
+    elif dt == 0x12:
+        num = round((int(m[-2], 0) << 8) + int(m[-1], 0) / 100, 2)
+    elif dt == 0x13:
+        num = round((int(m[-2], 0) << 8) + int(m[-1], 0) / 1000, 3)
+    elif dt == 0x14:
+        num = round((int(m[-2], 0) << 8) + int(m[-1], 0) / 10000, 4)
+    elif dt == 0x80:
+        num = int(m[-1], 0)
+        if num >= 128:
+            num -= 256
+    elif dt == 0x81:
+        num = int(m[-1], 0)
+        if num >= 128:
+            num -= 256
+        num = round(num / 10, 1)
+    elif dt == 0x82:
+        num = int(m[-1], 0)
+        if num >= 128:
+            num -= 256
+        num = round(num / 100, 2)
+    elif dt == 0x8F:
+        num = int(m[-1], 0)
+        if num >= 128:
+            num -= 256
+        num = round(num / 1000, 3)
+    elif dt == 0x90:
+        num = (int(m[-2], 0) << 8) + int(m[-1], 0)
+        if num >= 32768:
+            num -= 65536
+    elif dt == 0x91:
+        num = (int(m[-2], 0) << 8) + int(m[-1], 0)
+        if num >= 32768:
+            num -= 65536
+        num = round(num / 10, 2)
+    elif dt == 0x92:
+        num = (int(m[-2], 0) << 8) + int(m[-1], 0)
+        if num >= 32768:
+            num -= 65536
+        num = round(num / 100, 2)
+    elif dt == 0x20:
+        num = (int(m[-4], 0) << 24) + (int(m[-3], 0) << 16) + (int(m[-2], 0) << 8) + int(m[-1], 0)
+    else:
+        logger.error(f"Unknown datatype for '{name}': 0x{dt:X}")
+    return num
+
+
+def main():
     args = parse_args()
 
     if args.loglevel:
@@ -299,7 +416,20 @@ if __name__ == "__main__":
             logging.Formatter("%(asctime)-15s %(levelname)s: %(message)s")
         )
 
+    if args.action == "getsetting" and args.settingid is None:
+        logger.error("`--settingid` is required with `--action getsetting`")
+        return
+
     wpu = IthoWPU(args.master_only, args.slave_only, args.slave_timeout, args.no_cache)
-    response = wpu.get(args.action)
+
+    if args.action == "getsettings":
+        process_settings(wpu, args)
+        return
+
+    response = wpu.get(args.action, args.settingid)
     if response is not None:
         process_response(args.action, response, args, wpu)
+
+
+if __name__ == "__main__":
+    main()

itho_i2c.py

@@ -12,6 +12,7 @@ actions = {
     "getserial": [0x90, 0xE1],
     "getdatatype": [0xA4, 0x00],
     "getdatalog": [0xA4, 0x01],
+    "getsetting": [0xA4, 0x10],
 }
 
 
@@ -45,7 +46,36 @@ class I2CMaster:
         self.i = I2CRaw(address=address, bus=bus)
         self.queue = queue
 
-    def compose_request(self, action):
+    def compose_request(self, action, identifier):
+        if action == "getsetting":
+            request = (
+                [0x80]
+                + actions[action]
+                + [
+                    0x04,
+                    0x13,
+                    0x00,
+                    0x00,
+                    0x00,
+                    0x00,
+                    0x00,
+                    0x00,
+                    0x00,
+                    0x00,
+                    0x00,
+                    0x00,
+                    0x00,
+                    0x00,
+                    0x00,
+                    0x00,
+                    0x00,
+                    0x00,
+                    0x00,
+                    identifier,
+                    0x00,
+                ]
+            )
+        else:
             # 0x80 = source, 0x04 = msg_type, 0x00 = length
             request = [0x80] + actions[action] + [0x04, 0x00]
         request.append(self.calculate_checksum(request))
@@ -60,8 +90,10 @@ class I2CMaster:
             checksum = 0
         return checksum
 
-    def execute_action(self, action):
-        request = self.compose_request(action)
+    def execute_action(self, action, identifier):
+        request = self.compose_request(action, identifier)
+        request_in_hex = [hex(c) for c in request]
+        logger.debug(f"Request: {request_in_hex}")
         result = None
         for i in range(0, 20):
             logger.debug(f"Executing action: {action}")