[ale] IoT

[Jim Kinney]

That would be a very tiny package!

I'm going to have to dig into digikey IC toys for a listing of chips for
various protocol options. It may be time to revisit some old projects for
ad hoc mesh networks using a smart phone usb2go dongle and an app to route
low bandwidth data over it.

On Jul 26, 2016 11:12 PM, "Alex Carver" <agcarver+ale at acarver.net> wrote:

> The direct Zigbee replacement would be to use the base IEEE 802.15.4 and
> put a protocol of your choice on top of it.
>
> As for the Espressif ESP8266 chips, if you drop out of NodeMCU and
> program the chips directly using their SDK you can unlock a significant
> amount of power.  For example, did you know the chip has an I2S
> interface built-in?  Add on a codec chip and a RAM chip (for buffering)
> and you can stream MP3 sound with the module.
>
> On 2016-07-26 18:55, Chris Fowler wrote:
> >
> >
> >
> --------------------------------------------------------------------------------
> >
> >     *From: *"Jim Kinney" <jim.kinney at gmail.com>
> >     *To: *"Atlanta Linux Enthusiasts - Yes! We run Linux!" <ale at ale.org>
> >     *Sent: *Tuesday, July 26, 2016 9:06:54 PM
> >     *Subject: *Re: [ale] IoT
> >
> >     What's your replacement for zigbee?
> >
> > NodeMCU ESP-12Es.
> >
> > I started using one to monitor moisture in a ceiling after a bathroom
> remodel to
> > a tiled shower.  I then added temp/humdity.  I then added power control,
> etc.
> >
> > Each runs MQTT.  I'm running Mosquitto on Linux.
> >
> > To bridge my X10 legacy power control I wrote a program that subscribes
> to
> > x10/<house>/<device> topics.  It then executes bottlerocket using a
> firecracker
> > on ttyS0.  I have a device that will allow Linux to read X10 messages on
> power,
> > but I have to build it.  Once done then my X10 button transmit devices
> can
> > bridge to MQTT.
> >
> > You can buy NodeMCUs from Amazon for about $10.  China about $3.  Relay
> for
> > power control about $1.   I have found some pre-made devices for around
> $7 that
> > can be reprogrammed.   The benefit is that they include the enclosure.
> >
> > Using esp-link firmware you can take the NodeMCU and turn it into a "wifi
> > shield" for Arduino.   I investigated Zigbee and Z-Wave to replace my
> X10, but I
> > found NodeMCU and will not look back.
> >
> > I was using REST and then found MQTT.  I wrote a REST to MQTT gateway so
> I could
> > still use REST from clients if required.
>
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