rs2::invalid_value_error‘ hwmon command 0x7d failed

暂时还没解决

今天安装完Intel D435i的libRealsense后，在终端运行roslaunch  realsense2_camera rs_camera.launch时

roslaunch  realsense2_camera rs_camera.launch

返回报错：

12/11 22:13:14,505 WARNING [140508912400128] (types.cpp:78) hwmon command 0x7d( 0 0 0 0 ) failed (response -21= No data to return)
terminate called after throwing an instance of 'rs2::invalid_value_error'
  what():  hwmon command 0x7d( 0 0 0 0 ) failed (response -21= No data to return)
[camera/realsense2_camera_manager-2] process has died [pid 14638, exit code -6, cmd /opt/ros/melodic/lib/nodelet/nodelet manager __name:=realsense2_camera_manager __log:=/home/chen/.ros/log/abbbb13e-43c2-11ec-838f-5d8e3cdba66e/camera-realsense2_camera_manager-2.log].
log file: /home/chen/.ros/log/abbbb13e-43c2-11ec-838f-5d8e3cdba66e/camera-realsense2_camera_manager-2*.log
[camera/realsense2_camera-3] process has finished cleanly
log file: /home/chen/.ros/log/abbbb13e-43c2-11ec-838f-5d8e3cdba66e/camera-realsense2_camera-3*.log

然后在网上查了一下，在github上有看到一个老哥和我一样的情况，原贴是这个https://github.com/IntelRealSense/realsense-ros/issues/1633

Author自己debug出了解决方法，

After more debugging, it seems that the issue happens when calling sensor.get_option(option), where option is such that
nh1.resolveName(option_name)=="/camera/stereo_module/emitter_on_off"

A quick workaround was to add

if(nh1.resolveName(option_name)=="/camera/stereo_module/emitter_on_off"){
continue;
}

before the if (is_checkbox(sensor, option)) of base_realsense_node.cpp.

The camera is working now after that fix, but is there a better way to solve this?

 那么就先尝试下Author给的方法，加如这段代码，但是要加入哪个文件着实让我困惑，Author也没说是哪个文件，我找了很久,还是没有找到；

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