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 Ai Light bulbs and to his surprise two of them do not have an ESP8266 microcontroller but instead this IC labelled KK2015.
KK2015 powered Ai Light. Picture by Michel Clavette
It looks like a drop-in replacement for the ESP8266 since it has the same footprint and all the other components are (apparently) the same. But we have not been able to find even the slight reference to this one on the whole Internet…
So this is an open question: does anyone know about this chip?
UPDATE 20170407: I’ve been confirmed the KK2015 is the very same ESP8266 marked with a different label, reason unknown yet.
UPDATE20170407 (bis): A new update thanks to a contact that was involved in design of the Ai Light. The mark belongs to Konke, “a big customer of Espressif, so Espressif provides mark service for Konke in 2016.” So after all, the KK2015 is a rebranding of the ESP8266, nothing more.
Michel will try to flash it using the same procedure as for the ESP8266. Hope we will have some info from him soon.
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.
I actually bought two because you never know. And they arrived last Thursday. It took me less that 1 minute to open one of the boxes, pop out the cap and take a look at the inside just to see what I already knew. Time to play 🙂
Sometimes Chinese manufacturers throw a mysterious, unlabelled, IC into their designs so we can spend a few hours trying to figure out what they are and what they do. It’s such fun! I’ve been playing with one of those this afternoon, trying to answer those questions but also trying to understand why! Why is that chip there? Why did someone decided she needed that chip there?
Some weeks ago a user of ESPurna asked me if the firmware supported Itead’s 1CH self-lock/inching board. My answer was “why not” since all Itead’s products are very much alike. Wrong. This one is different. Let me summarise why:
There is no entry in the Itead’s wiki for the device
There are no schematics, drawings, in the store
It uses (and brings out) a Songle SRD-05VDC-SL-C SPDT relay (there is only one other product using this relay in Itead Studio store)
Lately I’ve been quite busy with the ESPurna firmware. It’s growing bigger and gaining some momentum. It’s really fulfilling to see other people using it and reporting back. But at the same time it’s very time consuming. Last Saturday I released version 1.5.0 with some new functionalities and bug fixes and I decided to use some of my free time over the weekend to work on a project that’s been waiting for a month in the shelf.
A few weeks ago I was playing with the Sonoff TH and I wrote a post about its sensor interface and the possibility of using lots of different digital sensors, including I2C sensors since the board can be easily hacked to export 2 digital pins over that interface.
And having I2C not only increases the number of potentially usable sensors but also opens the possibility of using I2C Analog to Digital converters to overpass the lack of analog inputs in the device. Here it comes the Texas Instruments ADC121 (datasheet), an 12-bit precision ADC with I2C support priced 2.74€ in quantities of 1.
Last December Itead Studio updated their Home Automation product line with a new and different product. The main difference is that it doesn’t have a relay and it’s mainly sensors and no actuator (if we don’t define a notifying LED as an actuator). The Sonoff SC is a sensor station that packs a DHT11 temperature and humidity sensor, a GM55 LDR, an electret microphone with an amplifier circuit and a Sharp GP2Y1010AU0F [Aliexpress] dust sensor in a fancy case that looks like it was originally meant for a speaker.
The device is packs an ESP8266 as expected and is compatible with the eWeLink app. But, such a collection of sensors, with 3 of them having analog interfaces, cannot be run from the single-ADC ESP8266 so Itead has thrown in a good old ATMega328P to drive the sensors and report the Espressif with the data.