RC1

parent 2184a8f8
......@@ -9,8 +9,12 @@ This is basically a wireless successor to
[my old ds1820tosub-project](https://www.poempelfox.de/ds1820tousb/), with
the following changes:
- Now wireless. Sadly, that means it needs to be powered by batteries
- uses a SHT31 as a sensor, not a DS1820.
- can also measure humidity
- uses a SHT31 as a sensor, not a DS1820. As a result of this, it
can now also measure humidity - the datasheet of the SHT31 claims
it can do this at a typical accuracy of ±2% RH in the relevant
ranges. It also claims a typical accuracy of ±0.3°C for
the temperature measurement, so the accuracy is better than the
±0.5°C the DS1820 promises.
Note that you will also need a way to receive the wirelessly transmitted
data. I simply used a [JeeLink](http://jeelabs.net/projects/hardware/wiki/JeeLink) v3c,
......@@ -44,10 +48,12 @@ The hardware uses as many "ready made" parts as possible and just slaps them
together. The bill of materials therefore is short:
* [JeeNode micro v3](http://jeelabs.org/jm3), which is
an ATtiny84 based microcontroller module with an RFM12B 868 MHz wireless module.
The board also includes a boost converter, which means it can be powered by
anything from 1.0 to 5.0 volts and will generate the 3.0 volts the
microcontroller and peripherals use from that.
an ATtiny84 based microcontroller module with an RFM12B 868 MHz
wireless module. There are multiple versions of that, the one used
here is the one with boost power, it includes a boost converter,
which means it can be powered by anything from 1.0 to 5.0 volts
and will generate the 3.0 volts the microcontroller and peripherals
use from that.
* SHT31 temperature sensor, in the form of a
[SHT31 breakout board by Adafruit](https://www.adafruit.com/product/2857).
This is used because the SHT31 is very tiny, so soldering it directly
......@@ -140,6 +146,9 @@ The dimensions of the case are about 68x66x30 mm and it is intended to be
cut from 3 mm thick acryl. The case can be assembled without any glueing,
the parts click together.
The case is not in any way suitable for outside use, it does not offer
any protection against water or dirt.
The license for the case is CC-BY-SA (due to the fact that the case
design I modified was also CC-BY-SA).
......@@ -237,3 +246,5 @@ e.g.
where addr is the ID of the sensor, either in decimal or
(prefixed with 0x) in hexadecimal notation.
<img src="pics/foxtempinfhem1.png" alt="many foxtemp2016 devices showing in a FHEM dashboard" width="500">
Markdown is supported
0% or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment