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Date: Mon, 22 Feb 2016 09:21:58 +0100
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Subject: Re: Update from Niclas
From: Sandro Martini <sandro.martini@gmail.com>
To: dev@zest.apache.org
Cc: Niclas Hedhman <niclas@hedhman.org>
Content-Type: text/plain; charset=UTF-8

Hi all,
another use case I see in other products is to enable a range of
temperatures, and when the value goes outside, something is triggered,
for example a led starts to flash.

Niclas, do you think your sensor could be packaged even with this ?

Bye,
Sandro


2016-02-21 14:19 GMT+01:00 Jiri Jetmar <juergen.jetmar@gmail.com>:
> Sounds impressive.. !
>
> another usecase for a Wifi temperature sensor. What about to put a little
> magnet to it
> so that it sticks on a heating body.
>
> With a peltier element it would be eventually possible to generate enough
> power (from the temperature delta) over
> the day for a transmission.
>
> Cheers,
> Jiri
>
> 2016-02-21 3:50 GMT+01:00 Niclas Hedhman <hedhman@gmail.com>:
>
>> Update; Yesterday I located the last major bug in the Forth interpreter.
>> Yay!!!
>>
>> ~1k assembler instructions, and ~8kbytes of RAM space for the JonesForth
>> vocabulary.
>>
>> Today I am starting on a TCP socket for the REPL, instead of the serial
>> port used so far.
>>
>> GPIO, ADC and other peripherals will be very straight forward memory
>> operations. Probably borrow from http://wiki.laptop.org/go/Forth_Lesson_22
>>
>> I have also decided on the multitasking model, and going for an Actor model
>> similar to Erlang, but adopted for Forth concepts (messages on stack).
>> Still not sure how to do memory allocation separation in a good manner, but
>> I'll get there.
>>
>> Cheers
>> Niclas
>>
>> On Mon, Feb 15, 2016 at 3:54 PM, Niclas Hedhman <hedhman@gmail.com> wrote:
>>
>> >
>> > This thread is well off-topic, but we are a small group of friendly
>> people
>> > so I don't mind. Someone else might, and if so... Speak up.
>> >
>> > Jiri; powering is an interesting longer term challenge. I don't want too
>> > much on the plate in the beginning, and rather have a MVP going out the
>> > door now, than solving a larger task by next year.
>> > But I like your idea, and should research it further. The peek power
>> > however is more like 700mW at full WiFi transmit. Super-capacitor to the
>> > rescue, I guess.
>> >
>> > Roman; I have always been fascinated by the simplicity of Forth, and it
>> > has been fun doing Assembler again.
>> > Forth isn't necessary for the temperature sensor device and the sensor
>> > network built on top of it. But I want to see if it makes sense to
>> create a
>> > user programmable platform on top of Forth, for automation systems
>> > integrators can use. I did a block programming system in Java for this
>> > purpose, and think I can run the same thing on Forth and a fraction in
>> > size. My target for that is the upcoming ESP-32, dual core and a whopping
>> > 400kB or so of usable RAM. The CEO told me over beer, that it is expected
>> > to only cost about 20% more...
>> >
>> > So, one of the next steps is a WiFi PID regulator, programmable, maybe
>> two
>> > inputs and a single 0-10V output.
>> >
>> > Again, the monitoring, control and data management on top will be key,
>> > together with the local network management for devices to work in unison,
>> > and the security needed whilst keeping it easy to use.
>> >
>> > I have heard that NASA uses Forth in missions, but don't know if this is
>> > still the case, or just surviving rumours from the 80s. But as we ride
>> hard
>> > into explosion of super-tiny devices, I think it is the only feasible
>> > alternative to C, and more often than not provides more compact code.
>> >
>> > My implementation for ESP8266 is far from done. I am currently chasing a
>> > bug in the compile system, as it seems that the compile BEGIN...UNTIL
>> > and/or IF...ELSE...THEN gets compiled with incorrect jump addresses.
>> > Hopefully I can sort that out in one of these evenings...
>> > After that, I will turn my focus to;
>> >
>> >   * Serial over WiFI socket instead of serial ports.
>> >
>> >   * GPIO, PWM, ADC and other microcontroller functions.
>> >
>> >   * Async message queues, so I can do...
>> >
>> >   * Multitasking
>> >
>> >   * pre-compile the FORTH vocabulary to ROMable code and not occupy the
>> > RAM.
>> >
>> > Anyway, I am putting up Jiri and Roman on the list for the field test.
>> >
>> > Cheers
>> > Niclas
>> > On Feb 15, 2016 14:23, "Roman Shaposhnik" <roman@shaposhnik.org> wrote:
>> >
>> >> On Fri, Feb 12, 2016 at 7:58 PM, Niclas Hedhman <niclas@hedhman.org>
>> >> wrote:
>> >> > 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 is the point where you got my attention 110% ;-)
>> >>
>> >> > 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?
>> >>
>> >> I'd love to chat about what you've got in mind.
>> >>
>> >> > 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.
>> >>
>> >> I'd love to help. More so than that -- I'd love to tinker.
>> >>
>> >> Thanks,
>> >> Roman.
>> >>
>> >
>>
>>
>> --
>> Niclas Hedhman, Software Developer
>> http://zest.apache.org - New Energy for Java
>>