<html><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><br><div><div>On Nov 4, 2009, at 10:34 AM, Ignacio Viano wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite">I'd already done it, but it didn't answer my questions. I tried redownloading Firmata-2.1beta7 but from <a href="http://firmata.org">firmata.org</a> and it worked fine. I dont' know what could happen.</blockquote><br><blockquote type="cite">Another question: <br> <br>It's ok if I modify line 38 of "StandardFirmata" and change the samplingInterval from 19ms to, for instance, 1ms or 0.5ms or it'll be useless or dangerous?<br><br>Thanks for your work, it's quite helpful.<br> Ignacio<br></blockquote></div><div><br></div>That 19ms timing is carefully tuned to best handle the FTDI USB-serial chips buffers. Making it lower, especially as low as 1ms, could cause huge jitter, like timing between packets ranging between 1 and 400ms instead of 10-30ms.<div><br></div><div>So its only worth changing that value if you are going to do real loopback testing to see if you can get stable results.<br><div><br></div><div>.hc<br><div> <span class="Apple-style-span" style="border-collapse: separate; border-spacing: 0px 0px; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-align: auto; -khtml-text-decorations-in-effect: none; text-indent: 0px; -apple-text-size-adjust: auto; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px; "><div style="word-wrap: break-word; -khtml-nbsp-mode: space; -khtml-line-break: after-white-space; "><br class="Apple-interchange-newline"><div><br></div><div>----------------------------------------------------------------------------</div><div><br style="font-family: Tahoma; "></div><div> ˇEl pueblo unido jamás será vencido!</div><br class="Apple-interchange-newline"></div></span> </div><br></div></div></body></html>