Category Archives: Technical

ESP8266 SDK reboot loops with cause:2, boot mode:(3,6)

Recently I’ve been building and flashing some projects to the ESP8266 directly using the Espressif SDK for development (not Arduino). After changing the flash mode, I was still in a reboot loop, but was seeing “rf_cal[0] !=0x05,is 0xFF” just before … Continue reading

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Trials and tribulations building and flashing ColorChord from scratch

In my efforts to create yet another improved version of my sound-response Light Suit, I elected to move to Charles Lohr’s excellent ColorChord project for sound analysis and LED driving. I wanted to add some functionality, though; mainly the ability … Continue reading

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ESP8266 with ILI9341/XPT2046 TFT Display w/ touch

These 2.8″ 240×320 pixel color TFT displays for $8-10  can be found on ALiExpress. There’s also an equivalent-looking one offered by AdaFruit for $30 if you want one fast – the pins are quite differently label, but I’m willing to … Continue reading

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ESP-01 V3 Doesn’t Reset or Run

I recently ordered a set of 10 new ESP-01’s from China.  After the usual few weeks, they arrived. I pulled one out, plugged it into the socket on my little interface board – which has buttons for RST and GPIO0, … Continue reading

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Wine Fridge Temperature Controller – V2

In a previous post, I described how I replaced the highly-proprietary power supply on min wine refrigerator with an off-the-shelf supply and a Monster Moto shield to drive the fans and termoelectric peltier heat sinks based on the PWM (pulse-width … Continue reading

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Wine Cooler Power Supply

I’m just going to blog about this one briefly, in case their are any other enterprising Wine Cooler owners out there who find that, two years into owning their cheapo wine cooler, the power supply craps out. I didn’t take … Continue reading

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Using ADC with the ESP8266

The ESP8266 family of boards still amaze me with their size and cost-effectiveness, but I will confess; the dearth of official information for some of the more esoteric features can be annoying. For my remote garage-door sensor, I wanted to … Continue reading

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Remote ESP8266-based Garage Door sensor

I’ve got a bunch of z-wave light switches and plugs in my house and I use OpenHab as my centralized home automation system. I have a detached garage and neighbors have experienced occasional break-ins in similar garages where people stole tools and … Continue reading

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NodeMCU Custom Builds for ESP8266

OK, just a quick blurb in case anyone else runs into this incredibly frustrating experience: I’m playing with some sensors where I’m interested in really low power consumption. Basically, I want to go into deep sleep, which only draws <100uA, … Continue reading

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Building another (better) PiCam security camera

I blogged briefly about building a security camera back in a previous post. It worked so well I decided to build another, but with a few improvements based on past experience… I used this WiFi adapter (from Aazon): TRENDnet Wireless N 150 … Continue reading

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