RFBUFSIZ
static char rfbuf[RFBUFCNT][RFBUFSIZ]; /* ring buffer */
snprintf(fbuf, RFBUFSIZ, "%.2f degC",
snprintf(fbuf, RFBUFSIZ, "%lld RPM", value);
snprintf(fbuf, RFBUFSIZ, "%.2f V DC", value / 1000000.0);
snprintf(fbuf, RFBUFSIZ, "%.2f V AC", value / 1000000.0);
snprintf(fbuf, RFBUFSIZ, "%.2f W", value / 1000000.0);
snprintf(fbuf, RFBUFSIZ, "%.2f A", value / 1000000.0);
snprintf(fbuf, RFBUFSIZ, "%.2f Wh", value / 1000000.0);
snprintf(fbuf, RFBUFSIZ, "%.2f Ah", value / 1000000.0);
snprintf(fbuf, RFBUFSIZ, "%s", value? "On" : "Off");
snprintf(fbuf, RFBUFSIZ, "%lld", value);
snprintf(fbuf, RFBUFSIZ, "%.2f%%", value / 1000.0);
snprintf(fbuf, RFBUFSIZ, "%.2f lx", value / 1000000.0);
snprintf(fbuf, RFBUFSIZ, "%s", drvstat[value]);
snprintf(fbuf, RFBUFSIZ, "%lld ???", value);
snprintf(fbuf, RFBUFSIZ, "%.6f secs", value / 1000000000.0);
snprintf(fbuf, RFBUFSIZ, "%.2f%%", value / 1000.0);
snprintf(fbuf, RFBUFSIZ, "%.2f Hz", value / 1000000.0);
snprintf(fbuf, RFBUFSIZ, "%lld", value);
snprintf(fbuf, RFBUFSIZ, "%.3f m", value / 1000000.0);
snprintf(fbuf, RFBUFSIZ, "%.2f Pa", value / 1000.0);
snprintf(fbuf, RFBUFSIZ, "%2.4f m/s^2", value / 1000000.0);
snprintf(fbuf, RFBUFSIZ, "%4.3f m/s", value / 1000000.0);
snprintf(fbuf, RFBUFSIZ, "%lld ???", value);