Add README for nymea-modbus-cli

nymea-modbus-cli/README.md

@@ -0,0 +1,33 @@
+# nymea-modbus-cli
+
+The nymea-modbus-cli tools is a command line tool for tsting modbus TCP communication in the local network.
+
+As of now, the tool allows to establish a modbus TCP connection to a server and read any type of register from the server.
+
+Following options are available:
+
+    Usage: nymea-modbus-cli [options]
+                                                                                                                                                                                     
+    Tool for testing and reading Modbus TCP registers.                                                                                                                               
+                                                                                                                                                                                     
+    Copyright © 2016 - 2022 nymea GmbH <contact@nymea.io>                                                                                                                            
+                                                                                                                                                                                     
+                                                                                                                                                                                     
+    Options:                                                                                                                                                                         
+      -h, --help                                    Displays this help.                                                                                                              
+      -v, --version                                 Displays version information.
+      -a, --address <address>                       The IP address of the modbus
+                                                    TCP server.
+      -p, --port <port>                             The port of the modbus TCP
+                                                    server. Default is 502.
+      -m, --modbus-address <id>                     The modbus server address on
+                                                    the bus (slave ID). Default is
+                                                    1.
+      -t, --type <input, holding, discrete, coils>  The type of the modbus
+                                                    register. Default is holding.
+      -r, --register <register>                     The number of the modbus
+                                                    register.
+      -l, --length <length>                         The number of registers to
+                                                    read. Default is 1.
+      -d, --debug                                   Print more information.
+    

nymea-modbus-cli/main.cpp

@@ -169,6 +169,8 @@ int main(int argc, char *argv[])
                     quint16 registerNumber = unit.startAddress() + i;
                     qInfo() << "-->" << registerNumber << ":" << QString("0x%1").arg(registerValue, 4, 16, QLatin1Char('0')) << registerValue;
                 }
+
+                exit(EXIT_SUCCESS);
             });
 
             QObject::connect(reply, &QModbusReply::errorOccurred, client, [=] (QModbusDevice::Error error){