MQTT topic naming convention
Naming stuff is one of the core decisions one has to take while designing an architecture. It might not look as important as utilising the right pattern in the right place or defining your database...
View ArticleStoring and publishing sensor data
Now that I have started to monitor some magnitudes at home, like power consumption or the front door opening, I have to do something with this information. The sensor information can be useful for two...
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Decoding 433MHz RF data from wireless switches
[Update 2013-03-01] I have added more documentation on the codes these remotes use in a different post. I’m starting to move towards not only gathering information but also acting. My first project in...
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ESP8266 Multi-relay boards: Sonoff Dual and Electrodragon
November was a busy month and the Sonoff Dual that IteadStudio kindly sent me to review was bored in a box waiting for some free time. But it was just fair that another board that has been waiting in...
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KK2015 based Ai Light
Really busy these days. I have some drafts ongoing but I wanted to publish this short post right away. One of the readers of this blog, Michel Clavette, sent me these pics just yesterday. He bought 5...
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Fenderino, the coolest guitar
Last February 7 I attended a workshop at a the SokoTech in Barcelona to assemble my own Fenderino, the coolest guitar ever (my knowledge about guitars is very limited, so take this sentence with a...
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A closer look at the H801 LED WiFi Controller
Some weeks ago I talked about the Magic Home LED Controller as I was adding support for it in my ESPurna firmware. At the time a user pointed me to the H801 Led WiFi Controller by Huacanxing. The user...
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Sonoff B1, lights and shades
Six months ago I was reviewing the AiThinker AiLight, a great looking light bulb with an embedded ESP8266EX microcontroller, driven by a MY9291 LED driver. Just before summer IteadStudio released it’s...
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Yet another WiFi light bulb
Eight months ago I reviewed and hacked the AiLight WiFi light bulb by AiThinker. By the time there was a number of people doing the same because of a key reason: it sports an ESP8266 microcontroller...
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PCB fabs
A few years ago (not many) I used to burn copper plates using acetic acid, a.k.a. vinegar. I was somewhat concerned about using stronger acids so it was OK to use another acid, even if it was soooo...
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Arduino MKR WAN 1300
I’ve been testing quite a few LoRaWan nodes lately for TheThingsNetwork.cat, some based on HopeRF RFM95W (over AVR, ESP8266, ESP32,…) others using Microchip’s RN2483 (an old friend of mine). I have a...
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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...
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WhiteCat ESP32 N1
I do not do reviews usually, but I sometimes do exceptions. In this case, it’s worth doing it, due to 4 main reasons: It’s a software & hardware open source project It’s local (local to me, that’s...
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RF power monitoring tools on the cheap
Recently we at @ttncat had to prepare a crash course on LoRa, LoRaWAN and The Things Network for a professional school in Barcelona. It was a 15 hours course that covered from the very basics to some...
View ArticleMQTT topic naming convention
Naming stuff is one of the core decisions one has to take while designing an architecture. It might not look as important as utilising the right pattern in the right place or defining your database...
View ArticleStoring and publishing sensor data
Now that I have started to monitor some magnitudes at home, like power consumption or the front door opening, I have to do something with this information. The sensor information can be useful for two...
View ArticleClik here to view.
Decoding 433MHz RF data from wireless switches
[Update 2013-03-01] I have added more documentation on the codes these remotes use in a different post. I’m starting to move towards not only gathering information but also acting. My first project in...
View ArticleClik here to view.
ITead’s Evolution
I was not the first to arrive at the party but since I discovered the ESP8266 I’ve been enjoying it. Then I stumbled upon the Sonoff and dude was I amazed. They are cheap and so very hackable you...
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S20 Smart Socket
Since I discovered the Sonoff I’ve been thinking about embedding it inside a switch. I started looking for old power meters, timers,… I had at home but the Sonoff is a bit too long. Why didn’t they...
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New firmware for the Slampher
Some weeks ago I received a parcel from Itead. Previously, I had written about the Sonoff and they were kind enough to send me two more of their home automation products for me to review: the S20 Smart...
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