Async.fi

Kettler ergometer serial protocol

I'm having some issues getting JErgometer working with my new Kettler E3, so to rule out the possibility of miswiring (the bike has a traditional RS-232 interface so I got a USB-RS232-WE-5000-BT_0.0 cable from FTDI which comes "wire-ended" and requires some soldering) I dug out "Kettler Treadmill Serial lua class" from mhwlng (thanks!). This, and my own brute-force testing got me the following list of commands relevant in the bike's context, which may be only a subset of the commands that the bike accepts but what could be used to build one's own implementation:

RS
Reset device
ID
Ergometer computer model info ("SF1B1706")
VE
Ergormeter computer firmware version ("117")
ST
Request status; reply:

pulse rpm speed*10 distance requested_power energy mm:ss actual_power
CM
Enter command mode; required before calling the P-commands below
PW x
Request power of x watts
PT mmss
Request time of mmss
PD x
Request x/10 km distance

Notes: I only connected RX, TX and signal ground (looks like the bike does not use any kind handshaking). Serial port settings are 9600bps, 8N1.

Tagged with:

Categorised as:

Gone static

Update 2: Looks like page load times, at least as reported by Pingdom, went up from what they initially were. In my own testing cached pages still load in something like 150 to 250 milliseconds but Pingdom disagees. I don't know if this is regular CloudFront performance fluctuation, some kind of impedance mismatch between Pingdom and CloudFront or "something else".

Update: That really did the trick and the estimated -90% page load time wasn't that far off:

Having been fed up with wastefulness (resource wise) and general slowness of the MySQL/PHP/WordPress/CloudFlare setup for some time, I have now moved this site to S3/CloudFront. Site is generated from an XML file (which I derived from a WordPress export dump) with a Python script that is hosted here. Commenting is obviously impossible but if you for some reason need to contact me you'll find contact details on your left.

Tagged with:

Categorised as: