Chinese STM8S103F3 4 relay with RS485 board

[soyxan]

Hi,

I am designing my home autimation system and I want to use Rs485 to cummunicate my modules (I dont like RF thing). My first idea was to use an arduino with a RS485 module and some relays but I found the following board on DealExtreme.

http://www.dx.com/p/4-channel-relay-module-programmable-with-rs485-microcontroller-stm8s103f3-for-arduino-pic-avr-arm-418334#.Vx3HYfmLRaQ

Is it based on STM8S103F3. Will I bea ble to ge it working with Souliss? Any advice of using it?

Any other cheap hardware solution that fits my needs (Souliss + RS485)

Thanks in advance.

[Di Maio, Dario]

Hi,

we support ProDino produced by KMP Electronics, is more expensive but is a well designed product and has both Ethernet and RS485 on board.

In a couple of months the Dino with ESP8266 will also be available, that will have Wifi and rs485 and will be cheaper.

Dario.

From Mobile.

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[Damiano Verzulli]

2016-04-25 9:39 GMT+02:00 soyxan <vicent...@gmail.com>:
> [...]

> I am designing my home autimation system and I want to use Rs485 to
> cummunicate my modules (I dont like RF thing).

Ok. So I'm not alone :-)
I'm doing _EXACTLY_ the same thing: implementing an home-automation system on top of several Arduinos, connected via RS485 (...as I don't like wireless, for this activity).

> My first idea was to use an
> arduino with a RS485 module and some relays

that's exactly what I tested and are currently implementing: several MEGAs controlling a bunch of relay modules (SSR, in my case)

>but I found the following board
> on DealExtreme.
> http://www.dx.com/p/4-channel-relay-module-programmable-with-rs485-microcontroller-stm8s103f3-for-arduino-pic-avr-arm-418334#.Vx3HYfmLRaQ

Nice. And cheap. As I said, I preferred SSR so... have not considered such an option.

> Is it based on STM8S103F3. Will I bea ble to ge it working with Souliss? Any
> advice of using it?

I think _YES_: you should be able to use such a module.

Based on this picture:

​I see on the right IN1, IN2, IN3 and IN4 and I bet that they are the controlling PINs of the four relays on the left.

On the top right you can see "A+" and "B-" that clearly are related to the RS-485 bus.

So I guess that, with such a module, you have _TWO_ ways to control your relays:

1 - with a common approach as for any other common relay modules (aka: with PINs IN[1234]");

2 - with some vendor-specific application protocol, built on top of RS-485 interface.

As for SOULISS:

a - you'll have no problem following the approach "1", providing you'll have an Arduino (or an ESP or whatever) with 4 OUTPUT PINs phisically connected to IN[1234];

b - I really doubt you'll be able to follow the approach "2"

Anyway, as from your question it looks like your plan is to use the above relay module _ALONE_, with only an RS-485 connection (...and power), I would say that.... this is _NOT_ feasible: you can use the module, but you need an Arduino to connect to it.

> Any other cheap hardware solution that fits my needs (Souliss + RS485)

All my Arduinos will be connected on the RS-485 bus (please note that, actually, it's not a bus in a "strict" sense) via this RS-485 brick... and SOULISS worked like a charm.

Now I'm (heavily) working about the placement of the whole equipments inside properly-sized-and-arranged wall-boxes and.... this is _definitely_ a much more complex task (with respect to the "development/integration" side). I'll probably end in relying on a custom-made PCB to be used as:

- terminal-connection-ends for light-switches, DHT sensors and REED-switches;

- starting point for connections towards the local Arduino.

It might look a bit exagerated but.... distributing POWER and handling GROUND connections towards all the sensors/push-buttons is really a mess (...without a PCB) :-)

....but I'm going off-topic. Sorry!

HTH.

Bye,

DV

[soyxan]

Thanks for your reply.

As far as I can understand from the chinese web page, and from the provided documentation:

http://pan.baidu.com/s/1nt6cLct

The board uses an STM8S103F3 which should be programmable, (in the previous link they talk about an SDK), or you can see more info on the following link

http://www.cnx-software.com/2015/04/13/how-to-program-stm8s-1-board-in-linux/

So my idea is to do NOT use an external arduino to control the relays. What I am not sure is if it can run Souliss in some way...

Regards.

[Fulvio Spelta]

It's not clear how's the programming configuration of the module at the supply state. From the few info available the module has 4 opto-isolated input (not driving the rele but available get acquire digital information) and 4 rele.

Due to STM cpu you can't run souliss directly on it.

Search for available libraries in order to have a stadard protocol over 485 such as modbus.

[Fulvio Spelta]

The http://pan.baidu.com/s/1nt6cLct link is a 404 (and same result followinf the link provided on the store). Good starting point :-)

[Thomas R.]

I know the thread over here is old but because it ends without any solution I feel like I have to add, that I read on aliexpress that the protocol it talks via RS485 is modbus RTU.

https://www.aliexpress.com/item/NEW-Modbus-RTU-4-Way-Relay-Module-DIY-STM8S103-System-4-Road-Input-485-Communication/32610593497.html

I don't own this device but maybe the modbus examples in souliss help you to connect it with an existing souliss node.

Best,

Thomas

[guyc]

Why not using DMX modules ?
In my actual project I control all the outputs by DMX. The I/O pins of the arduino are used for inputs.

Other possibility is one wire technology.
My next projects I gone do with ESP12e  and one wire for the inputs, outputs and temperature sensors (ds1820)
http://denkovi.com/one-wire-relay-boards-and-converters
The inputs modules I couldn't find for the moment, so I have to make them myself with the Dallas DS2408 IC.

Also a possibilty

Op vrijdag 6 januari 2017 04:33:58 UTC+1 schreef Thomas R.: