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💬 MySensors RS-485 Universal Module

openhardware.io last edited by openhardware.io

https://www.openhardware.io/view/788/MySensors-RS-485-Universal-Module
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Anticimex Contest Winner last edited by

License documentation required by CERN is missing. Please upload the necessary documentation. See instructions on the forum on open source hardware licensing.
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YuryPol last edited by @Anticimex

@Anticimex , I may have chosen the wrong option, please specify which license I need for open use and do not need to upload files?
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YuryPol last edited by

I chose a different type of licensing
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Anticimex Contest Winner last edited by Anticimex @YuryPol

@YuryPol as far as I know, all licenses require some form of documentation. In all cases I know of, this is documented with the license or on the licenses official site.
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mysensors 189 sensor 40 rs485 17 button 6 485 1 wall plate 1

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@Samuel235 said in Homini AC Powered Relay (2) Module: OMRON G3MB-202P Okay I'm trying to help you with the fuse component. I found a datasheet for the OMRON G3MB-202P. And there are enoght information to be known for fuse selection. I try to calculate it here (and i will try it with my bad English ). The most important information is the melting integral. The Melting integral has A²s as unit. So this means the maximum current for a time can exists without damaging the device. For further information look at wikipedia. So we need any further information about: the protection which is present before (the typical circuit protection in private houses) the melting integral from the device which we want to protect the maximum voltage the maximum switching current the breaking capacity Inrush current for the switched devices (we can't know) Typical values for an automatic circuit breaker in private houses are: from 25 to 100 A²s 230 V AC 16 A So this protection isn't good enough for our relay. The relay have these values: 230 V AC 2 A maximum switching current I²t value (melting integral): 4 A²s the allowed inrush current over a small time is higher than the melting integral. It is a bit confusing i think, but if we calculate the protection for the given melting integral and it's fine. So we can define the parameters for the client (switching site of this application here) The fuse have to be: I²s value higher or equal than the I²s value from the existing protection rating voltage over 230 V AC rating current 2 A or lower (because 2 A is the maximum at 25 °C, for 40 °C it is about 1.6 A) a maximum switching time of 1 second at 2 A or lower time with higher current but below 4A²s! To calculate use the switching time from the fuse datasheet an multiply it two times with the given current for this switching time. And i think a fast blow fuse would be the best. There are SMD fuses with 10.1 x 3 mm and 250 V AC available. If there is no fuse available with the values above, we could combine multiple fuses. A possible solution could be one bigger fuse for both relays and the ac/dc component. And a smaller fuse for the switching site of the relay and the HLK-PM01. But for this it is important that the circuit have only one input for the hot one (L) of 230 V and one output for each relay. In this case we could reduce the big connectors from 6 to 4. Like (L, N, Relay1, Relay2). And the temperature fuse can work for all components too So the protection for the primary site of the HLK-PM01 is a problem i think. Because the are no information available about the I²s value from HLK-PM01. I hope you can understand my English and could follow my explanation?
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OpenHardware.io • mysensors livolo • • openhardware.io

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Hello all, I studied a little bit more this part of the circuit and it's a standard self oscillating flyback converter or a ringing choke converter as others call it. Indeed it provides the most compact solution for space constrained designs. But all of this comes at a cost: it's difficult to obtain a stable circuit and it has to be tuned by trial and error - at least this is what the literature says. I'm not a switching power supplies expert here(even though I want to learn more about SMPS's in general but my time is limited for now) but I've come to a conclusion: it's difficult to tune this or to change the existing circuit to accommodate the mysensors circuits power requirements. I tried various combinations using sleep schemes and to change the flyback converter components as other mentioned in the mysensors forum and indeed I can power up my custom design that is presented in this thread BUT it's NOT STABLE. From time to time the switching transistor(mje13003) burns out and this is because I removed the resistor placed at the input of this power supply - near the bridge rectifier and replaced it with a wire(this is not the same resistor as @Lukaspp replaced from the base of the transistor which is the startup resistor for the flyback converter). Now the only purpose that I imagine for this resistor is to suppress the transients - but it has a big value(100Kohm) which limits the current to a non-usable value for our purpose. I know that there are other solutions to overcome the transients but they are either bulky or too slow for this(correct me if I'm wrong here). More than that let's not forget that we have 2 power supplies here and when the lights go on the first supply(flyback) input gets shorted by the relays contact(I have the relays variant btw not the one with triac) so I'm thinking that other transients appear here as the primary inductor doesn't like that as far as I know - so I assume the above mentioned resistor of 100Kohm comes into play here too. Another role for it would be to limit the inrush currents. I played with that value too but it needs to be very low to have something stable and I got a value around 200ohms but that doesn't help as it's too low and after some time the resistor burned up and saved my transistor :simple_smile: . Now with all the tricks in the world and tuning the flyback converter to give more current this won't help as again let's not forget we have a SERIES circuit here so without external intervention we can't achieve that(only if we break somehow the laws of physics or maybe my thinking is limited :simple_smile: ). In this case the external capacitor placed across the light bulb comes into play to supply enough current to the standby circuit which is our flyback converter over here. I played with that one too and from 0,47uF I got to 4.7uF to have a decent result - but this one gets bulky and more expensive from obvious reasons. And let's not forget that the light bulb itself has some impact overall because this is the actual LOAD that we want to control and there are various light bulbs over there with various requirements. More than that they have their power supply embedded which in most of the cases is a(you guessed maybe): a self oscillating FLYBACK CONVERTER or similar. So this one too has inrush currents, transients which are sensed down the line to our dear Livolo switch and affects my custom board stability again :simple_smile: - isn't life beautiful? :simple_smile: So far these are the results of my trials and none of them proved to be stable so I kinda gave up on this and will try to use a normal powering scheme somehow(as Sonoff switches with a battery powered touch switch on the wall). Not the best solution of all but this is what you get when the infrastructure wasn't thought for this scenarios from the beginning. The Livolo guys thought of all of this I assume so that's why they stayed only with a simple circuit - a PIC mcu which maybe sleeps most of the time and a simple radio receiver which draws around 5mA or even less - so yeah that's why this works and it's stable in its original form.
Curtain Control Node
OpenHardware.io • mysensors contest2016 curtain control • • openhardware.io

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@TON-RIJNAARD You need to select the board based on the bootloader you have flashed. Complile the code in Arduino and try burning the hex file using a programmer (USBasp, AVRISP, etc..) if are facing issues with Arduino.
💬 MDMSMotion
OpenHardware.io • mysensors sensor motion majordomo • • openhardware.io

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Fan control and feedback
Development • sensor dimmer development • • emc2

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@AWI I discovered it the hard way tonight. Lot of "Unknown sensor type" in my domoticz log. I have it working by declaring it as a distance, pressure etc. It's really dirty but at least for know I can track my RPMs. I guess I will try to poke around on the domoticz forums this week end to see if there is something cooking on their side. Thanks!
2 or more DHT11 - Sensors on one Arduino NANO MYSENSOR
Development • mysensors dht11 • • michlb1982

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@michlb1982 A couple of things, you put the device to sleep so while it's asleep, it won't respond to the commands to change the relays. Since you are combining relays and sensors, you need to keep the unit awake and find a different way to send the sensor data occasionally. For the relay status, read the comments in the sketch. You are saving the relay state and then reading that on startup. You can eliminate all of that code and just set the relay to off in the setup section. Cheers Al
MySensor Network on RS485 - only single node visible
Troubleshooting • mysensors • • Rysiek

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Very useful topic for me, thanks. Even though it's been a long time, the information was useful to me. And especially the information on the link you sent.

💬 MySensors RS-485 Universal Module

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💬 MySensors RS-485 Universal Module

Suggested Topics

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MySensor Network on RS485 - only single node visible Troubleshooting • mysensors • • Rysiek

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💬 Homini AC Powered Relay (2) Module
OpenHardware.io • mysensors relay contest2017 switch light lighting • • openhardware.io

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OpenHardware.io • mysensors livolo • • openhardware.io

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OpenHardware.io • mysensors sensor motion majordomo • • openhardware.io

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Development • sensor dimmer development • • emc2

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Development • mysensors dht11 • • michlb1982

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50
Online

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Users

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