What I am planning & a few doubts - Printable Version
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RE: What I am planning & a few doubts - werk_ag - 13-04-2015
It's always a pleasure see the solutions that each one find to put the system in an enclosure.
This is another interesting one. A two pieces system!
Looks good. Congratulations.
RE: What I am planning & a few doubts - hvalentim - 13-04-2015
(13-04-2015, 02:45)Werk_AG Wrote: A two pieces system!
This is draft 1 using possibly the tinniest possible box (12x7x5cm)
A better solution would include some sort of plug for the LCD and TFT, making it easier to shift cables and eventually use larger ones or even replacing displays without opening the box.
Also, the DHT22 might protrude more elegantly from some sort of periscope like support with inner cabling.
But I think I will wait for RX v.5 for trying to put that in practice
Stage one completed - hvalentim - 24-04-2015
I have finally finished stage one of my revamped weather station.
This includes a remake to the original radiation shield, made out of 11 melamine dishes (it's missing the top and bottom plates in the pic.s) and now with a 24/24h running fan aspiring a 6cm diameter PVC tube housing the temp/hum sensor. I tried keeping the light/radiation out by using a telescope like dampening system where the air enters laterally facing a ring.
There should be enough space around the PVC tube to let air flow naturally as well.
Below is the TX Box. The fan is actually being powered by a 12v car adapter I had unused. The sole bonus being I can actually control the speed by adjusting the voltage anywhere from 1,5v to 12v.
The ON/OFF switch is a bit of an overkill but again, I am reusing an available part. The capacitor is there for no plausible reason, except in the past I found it helped even a crippled regulator and I just thought it might be a good idea.
The system is solar powered using a 85W panel coupled with an 150AH lead acid battery. Both reused.
The regulator (below) powers both the TX unit, the FARS and the RX Unit. In the future it should also power a second TX unit.
To be done:
On the software side: I found the custom Debian kernel on the NAS I am planning to use to transmit data to the Internet is missing the required ch341.ko driver so as to communicate over usbserial with WeatherDuino. I risk to have to recompile the damn thing myself.
On the hardware side: completing the UV/Solar radiation portion and building a second TX Unit which, unlike the first one, which is up in the roof, should be placed in the ground.
RE: What I am planning & a few doubts - werk_ag - 24-04-2015
Hi,
Thanks for the pictures.
The radiation shield look very good, and very robust. Nice job.
Melamine dishes are hard to cut, how have you done it?
RE: What I am planning & a few doubts - hvalentim - 25-04-2015
(24-04-2015, 23:10)Werk_AG Wrote: Melamine dishes are hard to cut, how have you done it?
Actually that is the 7,4 cm diameter hole where I was housing the FineOffset stuff.
Drilling melamine is a pain. If I recall well I first tried with what I think in English is called an "hole saw" ("broca craniana") made for wood. It proved impossible.
Finally I did it with a metal hole saw. It's possible but difficult mostly because melamine gets hot, starts to smoke and it's really slow.
In the end I am convinced that a diamond hole saw, of the type made for drilling ceramics is probably the best option.
The truth of the story is all material and tools included it costed me more than buying a ready made radiation shield.
RE: What I am planning & a few doubts - hvalentim - 28-04-2015
(24-04-2015, 19:10)hvalentim Wrote: To be done:
On the software side: I found the custom Debian kernel on the NAS I am planning to use to transmit data to the Internet is missing the required ch341.ko driver so as to communicate over usbserial with WeatherDuino. I risk to have to recompile the damn thing myself.
Should anyone need to support serial over usb connection with WeatherDuino so as to work with Davis emulation mode I am attaching a ch341.ko which should work on ARM7 devices using Linux Kernel 3.2.68
modinfo ch341:
license: GPL
alias: usb:v1A86p5523d*dc*dsc*dp*ic*isc*ip*
alias: usb:v1A86p7523d*dc*dsc*dp*ic*isc*ip*
alias: usb:v4348p5523d*dc*dsc*dp*ic*isc*ip*
depends: usbserial
intree: Y
vermagic: 3.2.68 SMP mod_unload ARMv7 thumb2 p2v8
parm: debug
ebug enabled or not (bool)Instructions for Debian and derivatives:
1- Place *.ko in /lib/modules/3.2.68/kernel/drivers/usb/serial
2 - Perform a "depmod" command (let the system scan and find out about the driver)
3 - If needed add line "ch341" to /etc/modules file (initiates at boot). Normally not necessary if the previous step succeeded (it will load automatically henceforth).
You should now have a /dev/ttyUSB0
RE: What I am planning & a few doubts - werk_ag - 29-04-2015
I just can say that latest Ubuntu distros (which are debian based) support Arduinos with the ch340 chipset without having to install or modify anything.
RE: What I am planning & a few doubts - hvalentim - 29-04-2015
(29-04-2015, 01:19)Werk_AG Wrote: I just can say that latest Ubuntu distros (which are debian based) support Arduinos with the ch340 chipset without having to install or modify anything.
Absolutely correct. This is just in case one is using a streamlined custom version of the Kernel (which may happen with certain miniaturized devices - mine is originally meant to act as network storage alone - and should almost never happen with "full" devices) and is here mostly intended as a mark of progress.
For that matter the issue with Linux and WeatherDuino is not driver support but the fact that currently there is no working client software available.
Cumulus MX has restricted access and Weewx does not seem to use a suitable handshake.
RE: What I am planning & a few doubts - jomimota - 24-05-2015
(13-04-2015, 02:14)hvalentim Wrote: My RX Unit Case.
Updated (16/04/2015): Better quality pic.s and inner cabling.
Can you tell the LCD box dimensions (one are 12x7x5 and the other?), and if possible where you bought it?
Thanks.
RE: What I am planning & a few doubts - hvalentim - 25-05-2015
RX unit case dimensions are 120x70x50mm & 120x70x30mm (second is LCD w/ transparent cover).
Brand "Kemo". Purchased from Mauser.pt.
Specifically:
Caixa plástica com tampa transparente 120x70x30mm - Kemo G091 (used for LCD)
Caixa plástica 120x70x50mm - Kemo G086 (used for main board)