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From Jiri Jetmar <juergen.jet...@gmail.com>
Subject Re: Update from Niclas
Date Sun, 14 Feb 2016 15:55:56 GMT
Hi Niclas,

so you are hacking now on hardware ? Interesting.. Just curious - what is
that unique on a ESP8266
based temperature sensor ? Does it go to the direction of IoT ?
Independently of that - if you need some, I can surely help you. And to
"burn" a new firmware should not
be a big problem.. :-)

An idea on this topic. You mentioned you are building the backoffice for
the sensor as well. What about
to pipe the sensor data to a blockchain ? Means to build a smart contract
and let the sensor write the data
directly to such a contract  :

contract SimpleStorage {
    uint storedData;

    function set(uint x) {
        storedData = x;
    function get() constant returns (uint retVal) {
        return storedData;

This is a solidity ethereum.org contract to simply store data. One can
extend the concept and charge some little money
from those parties who wants to "get()" some data and hence the sensor can
pay for him self.


2016-02-13 4:58 GMT+01:00 Niclas Hedhman <niclas@hedhman.org>:

> Gang,
> I haven't had much time on Zest lately, as I have been busy creating a
> low-costWiFi capable, USB-powered temperature sensor. See
> http://hedhman.org/~niclas/IndoorioD.jpg
> And for the fun of it, I ported FORTH programming language to the ESP8266
> CPU that is on this, in Assembler of course. Interpreter, Compiler, base
> vocabulary (functions) and REPL in ~1000 assembler instructions, and the
> full vocabulary in another 10kbytes or so. It has been a lot of fun.
> This little puppy will go for one more round of prototypes next week, as I
> want to add an external watchdog and tiny prototyping area for maker
> community. Then I intend to make a field test with 100 units or so.
> So, why am I telling you all this?
> First of all, these guys will report the temperature back to a central
> server every 15 minutes or so. And the management system on the server is
> written with Zest. The rest is with Grafana and ElasticSearch. I am
> considering trying to build a business around data capture, aggregation,
> analytics and visualization. Anyone interested to join?
> Secondly, I am looking for volunteers for my field test. It will probably
> happen in April or so. If you participate, you will receive a USB powered
> sensor as seen. Plug it into power somewhere for 6 months, connect to it
> over WiFi, configure it to use your WiFi router over a simple web
> interface, and keep it powered for 6 months.
> If there are problems, I might ask for reboot. Hopefully not any firmware
> upgrades.
> Let me know if you are interested in this.
> So, as the device design and software is soon coming to a good state, I
> will return my focus on the central server, which means that I will get
> back to Zest development shortly. It has been far too quite recently.
> Cheers
> --
> Niclas Hedhman, Software Developer
> http://zest.apache.org - New Energy for Java

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