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ERROR: [GroupBulkRead::RxPacket] ID 8 result : -3002 !!!!!!!!!!

asked 2016-06-20 12:20:57 -0500

RohitM gravatar image

I am extending the code for the Robotis Manipulator from 6 motors to 7 motors. When I roslaunch the manipulator_manager.launch file, the 7 motors are getting detected. But when I try to Set Base Mode in the GUI, it is giving the error message as shown below:

[GroupBulkRead::RxPacket] ID %d result : %d !!!!!!!!!!

Below is the snippet of the code where the error statement is being printed:

int GroupBulkRead::RxPacket()
    int _cnt            = id_list_.size();
    int _result         = COMM_RX_FAIL;

    last_result_ = false;

    if(_cnt == 0)
        return COMM_NOT_AVAILABLE;

    for(int _i = 0; _i < _cnt; _i++)
        UINT8_T _id = id_list_[_i];

        _result = ph_->ReadRx(port_, length_list_[_id], data_list_[_id]);
        if(_result != COMM_SUCCESS)
            fprintf(stderr, "[GroupBulkRead::RxPacket] ID %d result : %d !!!!!!!!!!\n", _id, _result);
            return _result;

    if(_result == COMM_SUCCESS)
        last_result_ = true;

    return _result;

Does anyone have any suggestions?

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I have same problem too. Are you solve?

Youjun gravatar image Youjun  ( 2016-10-13 15:04:54 -0500 )edit

1 Answer

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answered 2016-10-18 08:23:08 -0500

RohitM gravatar image

By going through the code again I noticed that there is a parameter called LATENCY_TIMER. This needs to be increased when you are increasing the number of motors.

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Asked: 2016-06-20 12:20:57 -0500

Seen: 157 times

Last updated: Oct 18 '16