💬 Sonoff relay using MySensors ESP8266 wifi or mqtt gateway

[Nca78]

I have few sonoff and I just installed one with this script to replace a dead 433 device. So thank you very much for the script and the tutorial.

Reports of regular wifi connection losses are what kept me away from sonoff until now. Maybe the script could check wifi connection regularly and force a reconnect. Something like in the link below ?
http://www.esp8266.com/viewtopic.php?f=32&t=8286

[Bryden]

Another I have had these running posts.

I have had 3 Sonoff relays running on 240v 50Hz for 2-3 months straight.

2 of them in IP67 outdoor lights with Phillips LED Lamps, switch on and off several times per day, Not a single hardware issue.

best $6 ever

[Ed1500]

@betonishard ESPeasy I am not sure, but supposedly Tasmota does

[Nca78]

@Bryden said in 💬 Sonoff relay using MySensors ESP8266 wifi or mqtt gateway:

Another I have had these running posts.

I have had 3 Sonoff relays running on 240v 50Hz for 2-3 months straight.

2 of them in IP67 outdoor lights with Phillips LED Lamps, switch on and off several times per day, Not a single hardware issue.

best $6 ever

Yes over one month and very reliable, but with Domoticz is not integrating very well with my old 433MHz remote controls (that I use for my remaining 433MHz module until they are replaced).
Making me think about a small plugin board to control the sonoff through serial port, so it would make a real MySensors node for 10$ and avoid all the power supply, relay etc etc soldering and not rely on wifi.

[gohan]

I remember reading non to connect any other serial device while the Sonoff is connected to mains or it would get damaged.

[Ed1500]

@gohan The only time you would need to connect a serial device is I guess when you are flashing the software. There is no needTheThe only time you need to connect a serial device is when you are flashing the software. There is no need to connect it to the mains grid then. Whether it would damage anything i do not know but it is unnecessary and therefore absolutely not recommended to do it. Avoid working on anything that is connected to mains, especially if there is no need to have it connected

[gohan]

I was referring to what @Nca78 said about controlling the sonoff through serial port.

[Ed1500]

@warmaniac you might have solved yr problem already. Anyway, I use the github/computourist software for the SonOff. have been using it for many months. very stable

[Ed1500]

@gohan ah ok. Sometimes I lose track of who is reacting to who. Must be old age :-)

[Nca78]

@gohan said in 💬 Sonoff relay using MySensors ESP8266 wifi or mqtt gateway:

I remember reading non to connect any other serial device while the Sonoff is connected to mains or it would get damaged.

I supposed that's when you connect your computer to sonoff using serial adapter ?
I see no reason for damage if both es8266 and atmega are connected to the same VCC/GND.

[gohan]

I think it's because the gnd on the sonoff is shared with neutral from the mains. I have seen pictures of burned stuff but I actually never wanted to try to see if the computer gets fried or not 😁

[Nca78]

@gohan yes with it could happen, but if you just connect a standalone Arduino powered with VCC GND from esp8266 there's no reason to have a problem.

[gohan]

But why would you want to connect another arduino to the sonoff?

[betonishard]

@Ed1500 Thanks for your answer. Went for espurna.. Tested tasmota, but compared to espurna it was kind of slow. Works stable for quite some time now.

[Ed1500]

@betonishard Good to know. I was thinking about trying Tasmota for regular Sonoff, but I will keep slowness in mind

[Nca78]

@gohan said in 💬 Sonoff relay using MySensors ESP8266 wifi or mqtt gateway:

But why would you want to connect another arduino to the sonoff?

To have a real MySensors node that can be directly controlled with another node and not relying on wifi and controller.

[gohan]

Sorry but I am still missing the point. If you have to make a mysensors node anyway, why not make a classic relay node?

[Nca78]

@gohan because when using the sonoff I do not have to care about the power supply/safety, to find a case that is safe for electrical device and I only have a few things to solder.
And sonoff is cheaper than buying separately the power supply, case, relay etc

So just solder a few low voltage components on a PCB, plug in the sonoff and get a safe main powered actuator.

Not 100% sure it's worth it yet, still thinking a out it ;)
But main advantage is to reuse it in more complex sonoff devices with multiple relays, power measurement, in wall plugs etc etc

[gohan]

Once you come up with something I'll take a look to better understand what you want to do 😀
I have seen how to hack some of them to add a couple of wires directly on the esp8266 chip to get an i2c bus.

[Jonathan Caes]

How can I create a new device in Vera for a gateway? Can't seem to get that working :/