ASCOM-Switch-Waveshare-POE-ETH-Relay/README.html at master · ngaertner/ASCOM-Switch-Waveshare-POE-ETH-Relay · GitHub

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<h1 id="ascom-driver-for-waveshare-ethernet-relays">ASCOM Driver for
Waveshare Ethernet Relays</h1>
<h2 id="disclaimer">Disclaimer</h2>
<p>Please note that I am not affiliated , associated, authorized,
endorsed by, or in <em>any</em> way officially connected to Waveshare
International Limited.</p>
<p>THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.</p>
<h2 id="overview-and-purpose">Overview and Purpose</h2>
<p>This software is a “Switch” device driver for the ASCOM platform that
allows to connect to the following ethernet relay devices:</p>
<p><strong>Modbus POE ETH Relay [<a
href="https://www.waveshare.com/modbus-poe-eth-relay.htm">link</a>]</strong>
8-ch Ethernet Relay Module, Modbus RTU/Modbus TCP Protocol, PoE port
Communication, With Various Isolation And Protection Circuits</p>
<p><strong>Modbus POE ETH Relay (B) [<a
href="https://www.waveshare.com/modbus-poe-eth-relay-b.htm.htm">link</a>]</strong>
8-ch Ethernet Relay Module (B) With Digital Input, Modbus RTU/Modbus TCP
Protocol, PoE Port Communication, With Various Isolation And Protection
Circuits</p>
<p>The driver implements all features offered by the device firmware,
which include switching and flashing relays and (for the “B” device)
reading and automatic processing of digital inputs using linkage options
between digital inputs and associated relays.</p>
<p>The Waveshare ethernet relays are cheap (compared to dedicated
astronomical hardware), run stable and and are very versatile. They are
powered by Pover over Ethernet (PoE IEEE 802.3af), an standard DC Power
port or via screw terminal (7~36V DC) and the switches and inputs are
adressed using TCP based communication via the LAN port. According to
Waveshare the devices are rated for an operation temperature of -15℃ -
70℃, which qualifies them for typical outdoor/observatory use (given
that they are installed properly and protected in a sealed switch box).
Note that for these devices a LAN network is mandatory - it is not
possible to connect the Relays directly to an observatory PC. Typical
use-cases are to control devices and digital inputs within a (remote)
observatory via LAN (independent from PCs), and automate the control of
devices during astrophotographic sequences from popular softwares like
N.I.N.A.</p>
<p><strong>Note:</strong> I highly recommend to use the new “B” revision
model, to make full use of the digital input functionality.</p>
<h3 id="software-features-at-a-glance">Software Features at a
glance</h3>
<ul>
<li>Full control of naming and visibility of the hardware relays and
Inputs in the ASCOM driver</li>
<li>Toggle setting to automatically flash a relay on/off (e.g. for
triggering actions like the control a roll-off roof)</li>
<li>Reading of digital sensors (e.g. rain sensors, safety circuits or
limit switches)</li>
<li>Different linkage types between digital inputs and relays (e.g. for
safety circuits or to react on environmental conditions)</li>
</ul>
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