REV PDH Screen Always showing 12.0V

[WilliamLi0623]

We have a REV PDH flashed to 22.0.3 version firmware. The problem is that it is always showing 12.0V on its screen. However, while using driverstation or connecting it with REV Hardware Client, the real voltage can be monitored in either software. We tried to clear everything on the PDH and reflash the firmware, but nothing happens. Anyone who had have the same problem?

[WilliamLi0623]

Upgrade and Downgrade the firmware won’t help either. As we are going to have a 2022 offseason ( YES, it IS 2022, because we didn’t have a 2022 competition due to COVID in China), we have to use 2022 version firmware.

[joemost]

@WilliamLi0623

We have a REV PDH flashed to 22.0.3 version firmware. The problem is that it is always showing 12.0V on its screen. However, while using driverstation or connecting it with REV Hardware Client, the real voltage can be monitored in either software. We tried to clear everything on the PDH and reflash the firmware, but nothing happens. Anyone who had have the same problem?

Not adding anything helpful here but yeah I’ve noticed the same thing. Just never has been a high enough priority problem for us to deal with it

[LaviRZ]

That’s so weird, considering I would imagine it should be an OTS component measuring and displaying the voltage, and not subject to firmware bugs

[AdamF]

I can’t find the post, but this is a known issue with the mid-late 2022 batch of PDHs. Does not effect usability of the part at all. I would rely on a multimeter if you need to check battery voltage, or look at the driver station if you want to see voltage while the battery is in the robot.

Edit:The Post

[bcon]

REV PDH batch 12/22 battery voltage monitor problem

Hello all, @democat and I think there may be some problems with the 12/22 PDH batch. For us (7125) the PDH works perfectly normal, except that the battery voltage monitor seems to be very very messed up. With a fresh battery, that the DS states is roughly 13 volts will register as such on the PDH [image] After dropping to low 13, high 12 volts all the way to low 11 volts, the PDH gets fully stuck displaying only 12.0, and nothing else. [image] [image] When the battery drops to low 11V the…

Perhaps this is your issue

[billbo911]

Contact Rev.
Get your PDH added to their list. Once Rev. develops a solution, they will let you know what process to follow. Most likely it will be a hardware switch out, or a full replacement, but they have not announced a solution yet as far as I know.

[Ryan_Dognaux]

Pick up a 4 pack of these useful fellas and always know which battery is the next one to pull - and support an awesome FRC team!

BattHawk Pack of 4

[holazola]

Yeah we have a couple of PDHs with that same issue. Here’s what I have used for several years with PDPs, and we just added to this year’s robot.

Tons of sellers out there. Similar to this one:

https://a.co/d/aBj2Adc

Hopefully REV will find a solution and make good on this.

[FrankJ]

Maybe free FOC for the Neos?

[Joe_Ross]

@WilliamLi0623

As we are going to have a 2022 offseason ( YES, it IS 2022, because we didn’t have a 2022 competition due to COVID in China), we have to use 2022 version firmware.

While any competition can make their own rule, the game manual doesn’t require any specific version of PDH firmware.