sensor_msgs/JointState on Arduino

edit

Hi all,

I've got maybe a very noob question. I'm using rosserial on a Arduino One board and I'm trying to stream out the readings from wheel encoders as a sensor_msgs/JointState data structure. The problem is that I can't figure out how to properly push back elements in the data structure and when I try to use push_back() method I get the following error.

error: request for member ‘push_back’ in ‘wheel_odo.sensor_msgs::JointState::name’, which is of non-class type ‘char**’

Can you help me out? Thanks!

EDIT: here is the code

#include <CAN.h>
#include <SPI.h>
#include <SerialCommand.h>
#include <ros.h>
#include <std_msgs/String.h>
#include <sensor_msgs/ChannelFloat32.h>
#include <sensor_msgs/JointState.h>

ros::NodeHandle  nh;
std_msgs::String str_msg;

//sensor_msgs::ChannelFloat32 wheel_odo[4];
sensor_msgs::JointState wheel_odo;
char* id = "/myBot";
ros::Publisher sinbot_odometry("sinbot_odometry", &wheel_odo);

SerialCommand serialCommand;

#define CAN_BUS_SPEED 1000  // 1Mbaud

int state = 0;
int pin = LOW;

byte received[8] = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
byte rec [4] = {0x00, 0x00, 0x00, 0x00};

signed long rec_new;


void setup() {
    // put your setup code here, to run once:

    pinMode(7, OUTPUT);
    pinMode(8, OUTPUT);

    CAN.begin();
    CAN.baudConfig(CAN_BUS_SPEED);
    CAN.setMode(NORMAL);
    delay(100);
    Serial.begin(115200); //Baudrate Serial connection

    wheel_odo.header.frame_id = id;
    wheel_odo.name.push_back(str_msg);
    nh.initNode();
    nh.advertise(sinbot_odometry);
}

PS: By the way what I'm trying to do is streaming out the information from 4 wheel encoders using an Arduino One board. What I would like to have is the following set of information for each wheel:

[ ros_timestamp, arduino_timestamp, encoder_reading]

Considering that I'm not willing to implement my own message, is sensor_msgs/JointState the best solution in my case?

EDIT: Also, using Joint_state data structure as it is done in this link "answers.ros.org/question/43157/trying-to-use-get-joint-state-with-my-urdf/" is not working for Arduino and I get

error: request for member ‘resize’ in ‘wheel_odo.sensor_msgs::JointState::position’, which is of non-class type ‘float*’

when I try to resize the structure as:

wheel_odo.position.resize(7);