Tag Archives: ESP32

ESP32 room thermometer: with 18650 battery level indicator

It seemed like a good idea at the time. The TTGO ESP32 microcontroller board that I’m using for a room thermometer project comes with a battery connect and charging circuitry for a Li-Ion cell. It would be so much easier to deploy the thermometer if I could run it off a battery. And it works. Kinda. There are issues, though…. Read more »

Battery-powered ESP32 IoT room thermometer with OLED display

A while back, I made a couple of ESP8266-based room thermometers. These have been beavering away happily ever since – one on the desk in my office and one in the living room (or salon as we say in France). The only significant change I’ve made to them is to add the capability for them to report temperatures to an… Read more »

IR remote control for the home – part 3

In the previous two posts, we set up an ESP32 development board with an IR receiver to read codes sent by a remote control. Now it’s time to add MQTT capability. I chose the PubSubClient library – available in the Arduino IDE library manager – because it claims compatibility with the ESP32. When I looked closer, it turns out that… Read more »

IR remote control for the home – part 2

In the first part, I outlined my plan to build an infrared receiver to act as a hub for IoT devices in the home. Here, we’ll take a closer look at house the receiver works. Here’s what is required for this initial stage of the project: An ESP32 development board. I’m using a DOIT device, which costs around $14. A… Read more »

IR remote control for the home – part 1

How many remote controllers do you have in the house? One for the TV, one for the DVR, one for the Blu Ray player… There are five remotes sitting on the coffee table in our living room. Plus another couple scattered around the house, controlling table lamps and other TVs. And do you know what? This post isn’t even about… Read more »

TTGO ESP32 board with OLED display and Adafruit library

These days, there’s a huge amount of support out there for virtually any device you can buy. But every now and again you need to do a bit of head-scratching. So this post is simply my way of helping out anyone who’s going through the same process I just did. I bought a couple of cheap ESP32 boards that have… Read more »