Why Can't I Connect To A Robot; Why Has My Robot Stopped Working In Cold Weather; How Much Data Will The Robot Transfer Over Its Wireless Connection; How Long Will The Robot's Batteries Last - ExRobotics ExR-2 Operating Manual

10.2. Why Can't I Connect to a Robot?

ExRobotics checks whether each robot connects to the server before it's deployed. Therefore
connection issues are often because the control station hasn't connected to the server. The most
common reason is that a customer firewall has blocked access.
The connection to the robot consists of two types, one for the control commands via HTTPS over
TCP and one for very low-latency video signals via WebRTC over UDP. To be able to control the
robot from a computer within corporate networks both connection types need to be allowed by
both the corporate and the computer firewall. More information is provided in Section 3.

10.3. Why has my Robot Stopped Working in Cold Weather?

If the temperature of the main chip in the electronics box drops below 0⁰C the robot will shut
down. There's protective software to prevent this happening but if necessary relocate the robot
somewhere warmer. When its temperature is above 0⁰C switch the robot off and on again and it
should come back to life.

10.4. How much Data will the Robot Transfer over its Wireless Connection?

When the robot is "asleep" it transfers around 1GB of data per month. During a mission most of the
data is consumed by the video streams. This typically amounts to 1 GB per hour.
Untick the "keep awake" box when the robot isn't being used. This will shut down the cameras that
use most of the 4G bandwidth. Re-ticking the box will wake the robot.

10.5. How Long will the Robot's Batteries Last?

In operation this depends on usage and the age of the batteries. However, the life of a full battery
pack will usually lie between:
▪ 2 hours if a robot's driven continuously with lots of turns.
▪ 6 hours if it's static with its sensors on (but no lights).
Usually, a robot should be stored on its docking station when not in use so it will be charged via its
induction charger. However sometimes this isn't possible (e.g. during transport).
Although this should be avoided, ExR-2 robots will automatically shut-down if the battery voltage is
too low. This protects the batteries which should be undamaged unless the robot isn't connected to
a charger within 2 weeks.
Never leave the quick charger connected to the robot but not to a power supply. This will reduce a
full battery's life to 6 weeks even if the robot is switched off.

10.6. Why am I Surprised by the Battery Level Reported by the Cloud Software?

ExR-2 robots have a chip that calculates battery charge percentage based on power used. In most
situations this will be accurate. However, if the robot is switched on after the quick charger has
been plugged into the robot the battery percentage will always be reported as 0%. There are also
other as-yet unexplained anomalies.
ExRobotics B.V.
ExR-2 Robot
Operating Guide
This document is considered an uncontrolled copy when printed. Always ensure that you print and use a current version.
Copyright 2023 ExRobotics B.V.
Document No.: Owner:
20220412IP1
Version No.: 3 Ian Peerless
Date:
Page 56 of 69
2023-07-25