An ESP8266-based temperature, humidity and line voltage monitor

KA7OEI’s temperature/humidity/line voltage web server/telemetering device: As anyone who reads this blog probably knows, I have a bit to do with the operation and maintenance of the Northern Utah WebSDR – a remote receiver system that allows anyone with Internet access and a web browser to listen to the LF, MF, HF and some of […]

Using modular synth to control Atem camera switching over WiFi using ESP8266

Sebastian writes: I’ve been wanting to control my camera switching from my modular synth. So I made a setup where a low to high transition on a digital input on an ESP8266 module generates an OSC message on the WiFi network for the ATEM Mini Pro switcher to change cameras. Here, it’s triggered from the […]

Sinilink WIFI-USB mobile remote controller

Peter Scargill blogged about his AliExpress Sinilink WIFI USB controller project: So here’s a thing – I had this all set up and working perfectly with Tasmota on my WiFi – then plugged the unit (USB male end) into a USB3 connector – and it immediately lost the lot – well, the settings, not Tasmota […]

A self-expanding ESP32 PWM board

Eric Gunnerson writes: I’ve been working on a little ESP32 expansion board/shield for an LED project I’ve been working on. One of the nice things about the ESP32 is that it has a peripheral known as “LED control” that provides 16 independent channels of PWM for controlling LED brightness, and my project uses that capability. […]

DIY wireless temp/humid/pressure sensors for measuring vacuum sealed 3D printed filament containers

Scott M. Baker writes: I made some wireless sensors, using BME280 temperature, humidity, and pressure sensors, together with SYN115 transmitter modules. I used these to verify the storage of vacuum sealed “PrintDry” 3D filament storage containers. See the full post on his Scott M. Baker blog. Check out the video after the break.

Open source hardware ESP32-ADF

Here’s an open source hardware development board for Espressif audio development framework, the ESP32-ADF, from Olimex: With ESP32-WROOM-B module with 8MB RAM and 4MB of Flash, two microphones, two 3W speakers, codec, amplifier, Lipo charger, USB with programming, Audio 3.5mm jack, ESP32-ADF board offers everything you need to start playing with Espressif Audio Development Framework. Check […]

Control the bicycle traffic signal with a Particle Photon

Glen has been working on a Wi-Fi enabled bicycle traffic signal project: In the first post in this series, we built a miniature LED bicycle traffic signal using 3D printing, laser cutting, a sticker, and an Adafruit Neopixel Jewel. In this post, we’ll look at bringing the signal to life using a Particle Photon. We’ll […]

WiFiChron alarm clock

Here’s a cool WiFiChron clock with 8-character alphanumeric LED display by Florinc: For WiFiChron, two cascaded modules make an 8-character display functionally similar to HDSP-2534, but bigger and more visible. With the “Display Abstraction Layer” already in place, software support should be easy to integrate, since controlling it with the HT16K33 breakout allows the re-use of […]

Wifi based DIY 5V switcher for led-lights

Albert posted a detailed how-to on building DIY ESP-12F based USB-5V switcher: 5V powered 100LED circuit was consuming around ~1.8Watts(though 5.1Ohm series resistor was really hot) and the brightness of the LED’s were not bad, especially difference between first led and last led brightness didnt bother me it was hardly noticeable when seen from distance. So […]

uMesh – A self-contained, battery operated ESP32 module

Jarrett published a new build: I’ve been working on an ESP32 module. Part of the problem I’ve been seeing with inexpensive IoT dev boards, is that the design around the power system hasn’t been very good. Here’s my attempt to fix that. This is a battery-ready module with a proper lithium battery charge circuit, lithium […]