hosp-get: empty version string

[connorimes]

After the Smart Power was running for an extended period (maybe several weeks), hosp-get prints an empty string for the version requested from the device. If the read request had outright failed, we should have gotten an error, so perhaps the request returned an empty (null-terminated) string?

Version: 
On: 1
Started: 1
Millivolts: 4989
Milliamps: 0
Milliwatts: 0
Milliwatt-hours: 1173560

Other requests, like for data, seem to be unaffected.

Neither start/stop nor on/off cycling helped. Only after cycling power to the Smart Power device (unplugging and replugging in the power cable) did I get the expected string response again:

Version: SMART POWER V3.0
On: 0
Started: 0
Millivolts: 4989
Milliamps: 0
Milliwatts: 0
Milliwatt-hours: 0

It's possible this is a bug in the Smart Power firmware.