pymodbus compatability

	modified:   classes/transports/modbus_base.py
	modified:   classes/transports/modbus_rtu.py
	modified:   classes/transports/modbus_tcp.py

classes/transports/modbus_base.py

@@ -502,11 +502,12 @@ def read_modbus_registers(self, ranges : list[tuple] = None, start : int = 0, en
             if retry < 0:
                 retry = 0
 
-            #combine registers into "registry"
-            i = -1
-            while(i := i + 1 ) < range[1]:
-                #print(str(i) + " => " + str(i+range[0]))
-                registry[i+range[0]] = register.registers[i]
+            if(register.count > 0):
+                #combine registers into "registry"
+                i = -1
+                while(i := i + 1 ) < range[1]:
+                    #print(str(i) + " => " + str(i+range[0]))
+                    registry[i+range[0]] = register.registers[i]
 
         return registry
 

classes/transports/modbus_rtu.py

@@ -9,6 +9,7 @@
 except ImportError:
     from pymodbus.client import ModbusSerialClient
 
+
 from .modbus_base import modbus_base
 from configparser import SectionProxy
 from defs.common import find_usb_serial_port, get_usb_serial_port_info, strtoint
@@ -66,13 +67,14 @@ def __init__(self, settings : SectionProxy, protocolSettings : protocol_settings
                                         stopbits=1, parity='N', bytesize=8, timeout=2
                                         )
         else:
-            self.client = ModbusSerialClient(port=self.port, 
+            self.client = ModbusSerialClient(
+                            port=self.port, 
                             baudrate=int(self.baudrate), 
                             stopbits=1, parity='N', bytesize=8, timeout=2
                             )
 
         #add to clients
-        self.clients[client_str] = self.client
+        modbus_base.clients[client_str] = self.client
 
     def read_registers(self, start, count=1, registry_type : Registry_Type = Registry_Type.INPUT, **kwargs):
 
@@ -84,9 +86,9 @@ def read_registers(self, start, count=1, registry_type : Registry_Type = Registr
             kwargs['slave'] = kwargs.pop('unit')
 
         if registry_type == Registry_Type.INPUT:
-            return self.client.read_input_registers(start, count, **kwargs)
+            return self.client.read_input_registers(address=start, count=count, **kwargs)
         elif registry_type == Registry_Type.HOLDING:
-            return self.client.read_holding_registers(start, count, **kwargs)
+            return self.client.read_holding_registers(address=start, count=count, **kwargs)
 
     def write_register(self, register : int, value : int, **kwargs):
         if not self.write_enabled:

classes/transports/modbus_tcp.py

@@ -42,7 +42,7 @@ def __init__(self, settings : SectionProxy, protocolSettings : protocol_settings
         self.client = ModbusTcpClient(host=self.host, port=self.port, timeout=7, retries=3)
 
         #add to clients
-        self.clients[client_str] = self.client
+        modbus_base.clients[client_str] = self.client
 
         super().__init__(settings, protocolSettings=protocolSettings)
 

protocols/voltronic/voltronic_bms_2020_03_25.json

@@ -3,7 +3,7 @@
     "baud"  : "9600",
     "send_holding_register" : "true",
     "send_input_register" : "false",
-    "batch_size" : 21,
+    "batch_size" : 7,
     "batch_delay" : 1.4,
     "cell_voltage_state_codes" : 
     {