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Daniel Yum
Hello World!
Hello World!
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ESP8266 based Serial to UDP Bridge
I finally got around to building a very simple Serial to UDP bridge based on the ESP8266 board.  I tracked down the reboot issues to the fact that the LWIP stack needs to be fully initialized before wifi connection can be made.  There is a system_init_done_...

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Energy Monitors
Whenever I have some time to spare, I've been tinkering with the ESP8266 board , slowly getting it to act as a simple serial to Wifi gateway.  As the simplest path forward, I've setup the serial input to be read into a buffer, which then gets flushed as an ...

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Best laid plans...
I know I was being overly optimistic, but sometimes everything just works out the way you had hoped.  Sadly, this was not one of those times. I got to the house ready to get to work - my NUC  with all the bluetooth doohickey configured , a simple shell scri...

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Rewiring the Battery Box
As mentioned before , the lead acid batteries that power the house has seen better days.  The batteries being used are 24 6V batteries, wired in 3 parallel strings of 8 batteries with system voltage of 48V.  I was not able to read any direct model numbers o...

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Time Series Database
I've been thinking about what would be the best way to store the various sensor data that'll be generated in a way that's scalable, easy to visualize, and easy to analyze.  In reality, the amount of data that'll be generated from a handful of sensors scatte...

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HC-06 Bluetooth Serial Module
I've been messing around with the ESP8266 module for the last little while - starting with the SDK demos, it's fairly easy to hack the code to connect automatically to a given router and starting sending data over the network to a given target.  Even though...

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Getting started with development on ESP8266
Enterprising tinkerers on the esp8266 message boards have added the Xtensa Call0 ABI support to gcc , allowing a fairly clean way to compile the code and run it on the device. I'm going try to try to put the steps together here, mainly for my own benefit si...

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Wireless Power Consumption and ESP8266
I've been in touch with the folks at Bogart Engineering , who makes the "Trimetric" battery monitor used to monitor the 48V lead acid battery pack at the house.  I've been able to successfully read the streaming data out of the device , and have been trying...

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Powering a House
I did some preliminary assessment on the not-yet-smart-ish home 's electrical system to get a better understanding of exactly what I'm working with.  One of the things that's nice about having worked on variety of projects over the years is that you run int...

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Wifi Wifi Everywhere
Intel announced the Edison Module at the Intel Developer Forum this week.  To me, what's really exciting about the Edison is that this really is a full fledged computer (similar to Beagle Board families ) with first class built-in support for wireless infra...
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