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sbrodeur / ros-icreate-bbb

ROS (Robotic Operating System) packages for the iRobot Create with onboard BeagleBone Black
BSD 3-Clause "New" or "Revised" License
3 stars 2 forks source link

Battery charge is always zero in visualizations #37

Closed sbrodeur closed 7 years ago

sbrodeur commented 7 years ago

Not sure if the problem is that the battery charge is wrongly reported by the robot, or there is a bug in the visualization script. The rosbags should be checked first.

charge

sgcarrier commented 7 years ago

Here is the output of a rosbag recorded yesterday. header: seq: 79874 stamp: secs: 1478037977 nsecs: 240295485 frame_id: base_link voltage: 15.0839996338 current: -0.884999990463 charge: 2.23300004005 capacity: 2.70199990273 design_capacity: 3.0 percentage: 0.826424896717 power_supply_status: 3 power_supply_health: 0 power_supply_technology: 0 present: True cell_voltage: [] location: '' serial_number: ''

Ive seen the behaviour of 0 charge before. It usually happens when the battery is simply low and it floors the readings to 0. Although usually, the robot doesnt operate for long after that.

sbrodeur commented 7 years ago

The problem was wrong unit conversion in visualization script. See commit a4364ab for bug fix.