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02/20/2017 3:23 AM
post5094
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Things went better today. Not because there were no problems, but because we knew some workarounds and found more.
There are 4 key problems we ran into and we have workarounds for all of them.
Before you ask, yes, all robots were running the very latest versions of everything:
- Radio firmware 17.3
- DS 17.0a11
- RIO v8
Problem 1: Bad DHCP
- The field AP was configured as a DHCP server as usual. This has always worked fine in the past.
- Symptom: If you connect driver stations to the network, they sometimes DHCP and sometimes do not. Also they sometimes
get an address and then lose it.
- Likely cause: Competing DHCP servers are confusing the allocation of addresses.
- Workaround: Set all the driver stations to static IPs.
Problem 2: OpenMesh AN radio never gets a green light
- All robots were running the new AN radios. Some radios worked fine, some had this problem almost every match.
- Symptom: The radio boots but the green light never comes on to signify a connection to the field. The radio does not
have field connectivity.
- Workaround: Unplug all the ethernet connections from the radio and wait 10-15 seconds. The green light will come on.
Reconnect all the ethernet connections. Make sure the RoboRIO is in the port closest to power.
Problem 3: RoboRIO won't talk to the DS
- Sometimes the team would plug the RoboRIO into the enet port away from the power connector.
- Symptom: The radio is connected to the field and there appears to be traffic passing but the RoboRIO is not visible to
the DS.
- Workaround: Move the RoboRIO to the port closest to the power jack.
Problem 4: Magic e-stop
- Most teams never have this problem. Some teams have it every match.
- Symptom: Immediately at the beginning of autonomous, the robot e-stops without being commanded by the team.
- Workaround: Take the team off of FMS and let them run in at-home mode. Obviously this would never work at a real
regional.
Aside from all of these issues, the OffSeason FMS worked like a champ.
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