Divecomputer-reading from Mobile devices (Was: Divemate Fusion)

Dirk Hohndel dirk at hohndel.org
Sun Apr 10 06:54:08 PDT 2016


> On Apr 10, 2016, at 1:05 AM, Miika Turkia <miika.turkia at gmail.com> wrote:
>> 
>> Yes, now that I have a working BLE connection from the C.H.I.P to my iPhone I would have to agree - it's not exactly fast.
>> But then again, the information we need to transfer isn't all that large, either. The compressed XML for me seems to average under 4kB per dive/divecomputer. That seems to imply that we could transfer a dive every couple of seconds or so. Definitely worth to play with. I'd much rather not mess with a wifi connection if I can avoid it. Since we can't assume that public wifi is available for the C.H.I.P to connect to we'd have to create a point to point wifi connection with the phone / tablet. Messy, complicated, error prone.
> 
> If the CHIP acts as a wifi access point, the setup should be quite easy. Just need to initially configure wpa passphrase on the device and connect to it using mobile/laptop/whatnot. I have had too many problems with bt connections to count it reliable but wifi works generally quite well.

Over-engineering alert. No, we don't need to create a WiFi hotspot on the CHIP to transfer a few kB of data.
The more complex we make this, the longer it will take to get there, the more error prone its use will be.

/D


More information about the subsurface mailing list