I found the culprit with the error: ‘string’ in namespace ‘ROS’ does not name a type. The ros_string.h has the ff. lines: #ifndef STRING_H_ #define STRING_H_ Should be: #ifndef ROS_STRING_H_ #define ROS_STRING_H_ The filename on the top of the comment is string.h as well. It also solved the error: ‘class std_msgs::String’ has no member named ‘data’. It seems that this is also the reason for the previous error I got regarding std_msgs::String. I don't have to reorder the #include files anymore. I,ve got a couple more errors this time: char Ros::getTopicTag(char *topic) { ../avrRos/ros_generated.cpp:6: error: prototype for ‘char Ros::getTopicTag(char*)’ does not match any in class ‘Ros’ char getTopicTag(char const *topic); ../avrRos/Ros.h:132: error: candidate is: char Ros::getTopicTag(const char*) I replaced the autogenerated ros_generated.cpp with this: /* This file was autogenerated as a part of the avr_bridge pkg * avr_bridge was written by Adam Stambler and Phillip Quiza of * Rutgers University. */ #include "Ros.h" #include "string.h" //added manually for strcmp char Ros::getTopicTag(char const *topic) { //manually added const to resolve above errors if (!strcmp(topic, "call")) return 0; if (!strcmp(topic, "response")) return 1; return 0; //manually added semicolon(;) } Ros ros("callResponse", 2); I'm not sure if this is the right solution but the errors are gone now, except one. It's a make error, here is the console output: **** Build of configuration Release for project avr_bridgeHelloWorld **** make all Building target: avr_bridgeHelloWorld.elf Invoking: AVR C++ Linker avr-gcc --cref -s -Os -o"avr_bridgeHelloWorld.elf" ./avrRos_user.o ./main.o ./avrRos/Ros.o ./avrRos/String.o ./avrRos/cc_support.o ./avrRos/ros_generated.o ./avrRos/ros_string.o -lArduinoProMini5VCore -lm -Wl,-Map,avr_bridgeHelloWorld.map,--cref -L/home/roboteknik/eclipse/ArduinoCores -mmcu=atmega328p ./main.o: In function `__static_initialization_and_destruction_0(int, int)': main.cpp:(.text._Z41__static_initialization_and_destruction_0ii+0x2c): undefined reference to `std_msgs::String::~String()' main.cpp:(.text._Z41__static_initialization_and_destruction_0ii+0x34): undefined reference to `std_msgs::String::~String()' make: *** [avr_bridgeHelloWorld.elf] Error 1 I'm not sure how to solve this error. On Wed, Feb 9, 2011 at 2:51 PM, Homer Manalo wrote: > Ok now I have sorted out about the std_msgs error by ordering the #include > lines and object declarations: > > #include > #include > > #include "avrRos/String.h" > > std_msgs::String call_msg; > std_msgs::String response_msg; > > #include "avrRos/Ros.h" > > But I still got some errors here: > > sprintf(response_msg.data.getRawString(), "You sent : %s", > call_msg.data.getRawString()); > ../main.cpp:35: error: ‘class std_msgs::String’ has no member named > ‘data’ > ../main.cpp:35: error: ‘class std_msgs::String’ has no member named > ‘data’ > > call_msg.data.setMaxLength(30); > response_msg.data.setMaxLength(60); > ../main.cpp:50: error: ‘class std_msgs::String’ has no member named > ‘data’ > ../main.cpp:51: error: ‘class std_msgs::String’ has no member named > ‘data’ > > ROS::string data; > ../avrRos/String.h:18: error: ‘string’ in namespace ‘ROS’ does not name > a type > > ROS::string name; > ../avrRos/Ros.h:117: error: ‘string’ in namespace ‘ROS’ does not name a > type > > > > > On Tue, Feb 8, 2011 at 4:41 PM, Homer Manalo wrote: > >> Hello, I'm following the hello world tutorial and getting build errors >> particularly with these two lines: >> >> std_msgs::String call_msg; >> std_msgs::String response_msg; >> >> ../main.cpp:21: error: ‘std_msgs’ has not been declared >> ../main.cpp:21: error: expected constructor, destructor, or type >> conversion before ‘call_msg’ >> ../main.cpp:22: error: ‘std_msgs’ has not been declared >> ../main.cpp:22: error: expected constructor, destructor, or type >> conversion before ‘response_msg’ >> >> Other errors are just because of the two variables not being declared. >> >> >> >> On Mon, Jan 10, 2011 at 4:10 AM, Adam Stambler wrote: >> >>> Hi >>> >>> Configuring eclipse can be a bit tricky. This tutorial was the most >>> straight forward explanation: >>> >>> http://www.arduino.cc/playground/Code/Eclipse >>> >>> If you are still having trouble, let me know and I will write up an >>> explanation on the ROS site. >>> >>> -Adam >>> >>> >>> On Sun, Jan 9, 2011 at 2:36 PM, airthimble < >>> joseph.st.amand@mines.sdsmt.edu> wrote: >>> >>>> >>>> I have been trying to use this package in order to communicate with a >>>> Seeduino. I tried following the avr-bridge tutorial but had trouble with >>>> it. >>>> I typically put together a make file for a project and just use a text >>>> editor. I have no trouble using eclipse, I just cannot figure out how to >>>> configure it. There does not seem to be a well-made tutorial for >>>> configuring >>>> eclipse in Ubuntu 11.04. >>>> >>>> If anyone would be able to give me a push in the right direction it >>>> would be >>>> much appreciated! >>>> >>>> Thanks! >>>> -- >>>> View this message in context: >>>> http://ros-users.122217.n3.nabble.com/AVR-and-ROS-tp2200563p2222791.html >>>> Sent from the ROS-Users mailing list archive at Nabble.com. >>>> _______________________________________________ >>>> ros-users mailing list >>>> ros-users@code.ros.org >>>> https://code.ros.org/mailman/listinfo/ros-users >>>> >>> >>> >>> _______________________________________________ >>> ros-users mailing list >>> ros-users@code.ros.org >>> https://code.ros.org/mailman/listinfo/ros-users >>> >>> >> >