SONOFF S31 WiFi Smart Plug with Energy Monitoring, 15A Smart Outlet Socket ETL Certified, Work with Alexa & Google Home Assistant, IFTTT Supporting, 2.4 Ghz WiFi Only (2-Pack)

Was a little difficult to pair with Alexa, had to upgrade eWelink. So far happy with it.

I bought a single S31 to replace an unreliable Fibaro Z-Wave switch. I never even bothered to use the original S31 firmware. I took it out of the box and flashed it with ESPHome under Home Assistant. Worked great the first time with no surprises. The power monitoring seems to work, but I havent bothered calibrating it. If it continues to be reliable over time, I will definitely buy more of these.

I like my smart devices not relying on external servers. So if the device is WiFi then I make sure I can flash it with tasmota. These are easy to disassemble and the flashing is not too difficult. Unfortunately the tax, RD, find, and vc are not pass through and are only pads but it is not too difficult to solder pigtails for flashing. I would prefer if the plug receptacle was on the side instead of the front.

Using them with Alexa, very reliable, never had a failure/need of reset. Easy setup and Alexa integration with the ewlink app. In the ewlink app you can turn on some features that Alexa do not have but still works with Alexa, additional bonus. E.g automatically turn off the device after xxx time has lapsed since power on, power on state, timers and loop timers. Very useful for my setup, controlling a water pump for my house remotely.

This is my first time buying a smart device snd loving it so far. I always hated to get up and turn off my living room lamps. Now its just one voice command and it turns off. I like how sturdy it is but i hope it wont go bad after some use as when we turn on or off it makes switching sound.. overall loving it so far..

I love everything about this outlet, except for the power monitoring function, I wish that you could download more than just the past 3 months of monitoring data, I also dont like that the data is cloud based. A great future addition would be to have an option to view when the appliance starts up & shuts off if possible? That way you could know the total running time.

Like many other reviewers, I have purchased this particular switch to install Tasmota on. I use them for energy monitoring, and in some cases their original intent - outlet switching, in my home. I buy whatever pack is cheapest per unit at the time, be it 1, 2 or 4 pack versions. Theyre all the same in my experience. To get them installed with Tasmota, I first tried to solder leads to them. Then I tried to solder pin headers and that was a little bit easier. Im slightly beyond entry level skill with soldering, but I destroyed at least three units in this learning process. I finally graduated to micro-grabber electrical test clips and have ripped through over two dozen conversions now without incident. Lets be frank. Id rather Sonoff just offered Tasmota OS from the get-go, or made these over-the-air flashable. I will settle for nothing less than local control and Im definitely not itching for a new and different cloud solution or app. Id prefer not to hack these devices in the first place and if Sonoff works towards preventing this from a hardware or software standpoint, I will buy no more of them. At the time of this writing (March 2022), this is probably one of the cheapest way to get local energy monitoring and basic 15 amp capable on/off outlet switching. I use Home Assistant for my home automation platform. These are fully compatible with their new energy monitoring dashboard. This provides me with significant insight into my homes energy use, especially now that theyre widely distributed to the overwhelming majority of my outlets. I usually capture between 13-18 kilowatt hours per day, the bulk of my usage. To be clear, I use higher grade energy monitoring switches in mission critical applications (furnace, fridge, etc.), but these are great even for non-mission critical high amp usage scenarios up to 15 amps. Ive pushed some of mine well up to the limits and havent had any major problems or sparks fly. Out of a couple dozen, Ive had one actual device failure. Oddly enough, even with different firmware, different units operate differently on my WiFi. Some stay connected to Wifi 100% of the time, others intermittently connect throughout the day. I dont lose any granular Home Assistant data because of this, nor are they ever inaccessible and fail to turn on/off. I dont have a good answer as to why different units behave differently with the same software. Odd behavior, but it doesnt result in problems. I really cant complain anyway, Im using them well outside of the manufacturers intended use. Build quality is good enough but I wish there was a bit more consistency. Since the majority of buyers are intending to hack these, I really wish they wouldnt cinch down some of the poor-quality screws like they are Shee-Ra or the Hulk. Ive destroyed way more screws than Ive wanted, and thats with the perfect screw removal tool which Ive determined to be a 2.0mm flathead screwdriver. Again, I just wish I could buy a decent quality, super cheap, 15 amp capable smart switch product with the OS of my choice out of the gate. Ive used these to solve VERY REAL problems in my home. From triggering outlets based on other inputs to making serious dents in energy conservation, I believe the $200ish dollars Ive put into these Sonoff S31 units will eventually pay for themselves. Its fairly easy for me when Im paying almost $0.25 per kilowatt hour, others might not have as good of an ROI. If anything, Ive achieved some level of energy usage consciousness. Ive killed and/or automated quite a few parasitic energy draws I wasnt even aware of, and have easily increased my automation abilities at the same time. Its important to know that these utilize about 2 watts each, just to function. This might not seem like much, but with two+ dozen of them running 24 hours a day - were talking about a ~50 watt constant load just to monitor outlet energy. For me, Ive killed and automated much more than that, so Im in the black as it were. Its important, at least for me, to keep tabs on the cost and value of energy monitoring. Im hoping I can continue to use these to save at least $500 in energy in the next 5 years, and so far, that seems to be a reasonable goal based on how I use them. Lastly, I dont want to get too much into minutia, but you need a fairly robust WiFi network to support the internet of things over WiFi. Personally, I utilize multiple networks, including Lutron, Z-Wave, Zigbee and WiFi to get there. Put simply, I dont use these cheap and ubiquitous hacked WiFi devices to service mission critical applications in any way. If a failure would cost me a fair bit of money, I spend more than $10 to capture energy usage and (sometimes) provide switching capabilities. +4 stars for being a hackable and very useful device overall. You can debate about that last star, even I waver between 4 and 5 stars. They provide much value for not much dollar and a reasonable +/-2 year path to return on investment for many people that are trying to optimize energy consumption or provide local, automated switching controls.