description
At Victron Energy we use FXTs to report system values to our website by periodic get
requests. Currently SMS messages are used to report something back to the modem /
instruct it to do something etc. It would be nicer if AT commands could simply be sent
over tcp/ip. Since in general modems are behind NATs, it is not easily possible to open
a connection to it. This example is trying to workaround that by using PubNub
pubnub.com.
note: it is not finished / not completely tested. It is at a point that it seems to
work, but some things can be done better / some features are missing etc.
Software version
OASiS 2.36 and windows executable
Hardware version
Fast Supreme 10 (the old one), IESM ethernet card
Features/Services covered
- dynamic string functions
- traces without using TRACE ( ( something ) )
- custom AT commands (well with ve macros, the adl names are far too long)
- calling custom at commands from within the application
(was not possible, don’t know current status). - flash
- TCP client socket
- HTTP Keep-Alive requests
- PubNub support
- AT console on top of PubNub
- (limited) MSVC solution
- malloc/free/realloc (Doug Lea, see below) [be carefull though to use the correct free!]
Plug-ins used
WIP (but not the http client)
https://forum.sierrawireless.com/t/wip-5-3-periodic-http-get/4610/1
https://forum.sierrawireless.com/t/multiple-http-requests-every-other-one-fails/4184/1
code:
github.com/jhofstee/siwi2way
Thanks goes to:
Doug Lea for his malloc. g.oswego.edu/dl/html/malloc.html
(for realloc calloc and friends)
loyd Hilaiel and contributors for yajl, lloyd.github.com/yajl/
JSON parser
Regards,
Jeroen