Tag "hlw8012"

Sonoff S31, a world apart

It’s not that other Sonoff products are not “serious” business, but there are a number of design changes in the Sonoff S31 that make this new product a world apart. For the functional point of view it looks like a S20 with POW-powers, but they have redesigned the product completely. The result is very very interesting. Revamped case, more compact and sturdy Redesigned PCB, actually 2 different PCBs for main and control Different power monitor chip: the CSE7766 (same as in the new POW R2) replaces the HLW8012 The only drawback: it’s only compatible with plug types A & B, tat is central and north-america and few other countries....

ESPurna smart socket

After a busy month I decided to spend some energy on doing hardware instead of software and the result was the ESPurna board I posted about just yesterday. The goal was to have a device based on the ESP8266 I could fit into my house wall gangs, with an SPDT relay to work with multi-way switches and power monitoring using the same IC the Sonoff POW uses: the HLW8012....

The ESPurna board, a smart wall switch with power monitoring

If you have read me, you might know I have a firmware for ESP8266-based smart switches called ESPurna. The firmware integrates with Alexa, Domoticz, Home Assistant and about any other service that supports MQTT or HTTP REST APIs. It supports a variety of devices, including almost the whole Sonoff family by Itead Studio, but also some other commercially available boards and light bulbs, and open source hardware projects as well....

AiLight - A hackable RGBW light bulb

Some weeks ago a tweet by Manolis Nikiforakis (@niki511) with the #ESP8266 hashtag drew my attention. Manolis had just received a “smart lamp” branded by Ai-Thinker, the AiLight. Yes, the same Ai-Thinker that has sold millions of ESP8266 based modules. Chances were it had an ESP8266 microcontroller inside. Too good not to buy one and take a look at the inside. Manolis shared the link where he bought his at Ebay for a bit more than USD 10 plus shipping....

The Sonoff POW

Some months ago I wrote about a hack I did to one of my Sonoff devices to be able to use a simple current sensor to monitor my washer machine process and alert me whenever my laundry was done. A few weeks ago Itead Studio released two new models for their Sonoff line, the POW and the DUAL. And the POW is Itead’s answer to my hack. I’m not saying they copied me, just that the Sonoff POW makes my hack utterly unnecessary....

The HLW8012 IC in the new Sonoff POW

The HLW8012 is single phase energy monitor chip by the chinese manufacturer HLW Technology. It features** RMS current**, RMS voltage sampling and RMS active power with an internal clock and a PWM interface in a SOP-8 package. You can buy it at Aliexpress for less than a euro a piece and the necessary components are fairly easy to source and quite cheap. All in all it looks like a great IC to include power monitoring in your projects....