[Nut-upsdev] [Nut-upsuser] Tripplite OMNIVS1500 Woes

Charles Lepple clepple at gmail.com
Thu Aug 14 02:22:23 UTC 2008

On Aug 13, 2008, at 10:14 AM, Jon Bougher wrote:

> send_cmd(msg_len=2, type='B')
> send_cmd: sending  3a 42 bd 0d 00 00 00 00 '.B......'
> send_cmd: received 53 31 34 30 31 00 30 0d 'S1401.0.' (bad)
> send_cmd: send_try = 3, recv_try = 10
> Error reading B value: Device detached? (error 0: No error)

What if you increase MAX_SEND_TRIES? Under normal operation, this  
should not slow things down, but increasing it to 5, 10 or 20 might  
help if the UPS is busy and can't respond immediately.

I think remember where the "error 0" part came from. The USB-to- 
serial converter always returns 8 bytes if it can, but those bytes  
may be stale (see above - we sent the 'B' command, but got the  
leftover 'S' status result).

Arjen had some suggestions about how to rework the reconnection  
scheme, and based on the error above, it's not going to be simple.

Charles Lepple
clepple at gmail

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