A screenshot of my PCB from KiCad

I have one cap either side of the LDO and then two more caps before it enters the ESP32-H2. This is the layout. In terms of being close, I'm currently not sure how close is close enough. The two caps for the LDO are close, but the two for the ESP32 are probably 10mm or 15mm away.

My first attempt at building an ESP32-H2-MINI-1 PCB didn’t go to plan! This is the first ESP32 PCB I've designed. Hot on the heels of my nRF54L15 devkit, I decided to give the ESP32-H2-MINI-1 a go. I wanted to push myself, by designing something a little more complicated. This board featured the small ESP32-H2-MINI-1 module, two buttons, three LEDs and a USB-C connector! I also exposed most of the GPIOs via header pins.

My first attempt at building an ESP32-H2-MINI-1 PCB didn’t go to plan!

This is the first ESP32 PCB I've designed. Hot on the heels of my nRF54L15 devkit, I decided to give the ESP32-H2-MINI-1 a go. I wanted to push myself, by designing something a little more complicated. This board featured the…

Unfortunately, my more complicated ESP32-H2 board didn't work :( My USB connect is getting 5V and my LDO is supply 3.3V (both of the LEDs), but the ESP32 H2 isn't being picked up by my USB.

Comparing different temperature probes to check their accuracy YouTube video by Tomas McGuinness

Comparing different temperature probes to check their accuracy - my latest YouTube video is up!

youtu.be/cixgrRtdaB8

My new nRF54L15 board is assembled and it worked first time!

Assembling and flashing my custom nRF54L15 board A few weeks ago, I designed a simple breakout board for the MinewSemi ME54B01 module. Whilst I had one of the DevKits, I wanted to go through the exercise of designing my own PCB, with a battery compartment. I used KiCad to do the schematic and PCB layout and after waiting a few weeks, Aisler.net delivered my boards! Not much going on, just a coin battery holder, two LEDs, a button and the module.

Assembling and flashing my custom nRF54L15 board

A few weeks ago, I designed a simple breakout board for the MinewSemi ME54B01 module. Whilst I had one of the DevKits, I wanted to go through the exercise of designing my own PCB, with a battery compartment. I used KiCad to do the schematic and PCB…

I just had Claude write me a YouTube script based on a Blog post I wrote and some of my other scripts. Haven't read it yet.

ESP-Matter: On Network commissioning of an ESP32-S3-ETH As I'm building out an Ethernet based Matter device, I wanted to get something called On Network Commissioning up and running. In this post, I'll explore what steps I need to take in order to enable it on a Waveshare ESP32-S3-ETH devkit. What is On-Network commissioning? When you commission a typical Matter device for the first time, like a motion sensor or light bulb, you need to add it to your network.

ESP-Matter: On Network commissioning of an ESP32-S3-ETH

As I'm building out an Ethernet based Matter device, I wanted to get something called On Network Commissioning up and running. In this post, I'll explore what steps I need to take in order to enable it on a Waveshare ESP32-S3-ETH devkit. What…

That's excellent!

I'm glad they helped!

That doesn’t seem good. Do you have cables in both the call for heat and call for hot water terminals?

Mine is an s-plan setup too. I used the resistor trick to enable two flow temps, but that shouldn’t matter for EMS. Odd.

I need to hardwire my Inverter to my network as the WiFi connection is constantly dropping and reconnecting.

ESP-IDF SDK: Setting Up Ethernet on ESP32-S3-ETH Devkit Below is a photo of a Waveshare ESP32-S3-ETH DevKit. In this blog post, I'm going to look at what's involved in connecting this board to my local network using the ESP-IDF SDK. The Waveshare ESP32-S3-ETH DevKit As the name suggests, it features an ESP32-S3 and an Ethernet RJ45 connector. It also has a camera connector, a MicroSD slot and the ability to support PoE (with an additional board).

ESP-IDF SDK: Setting Up Ethernet on ESP32-S3-ETH Devkit

Below is a photo of a Waveshare ESP32-S3-ETH DevKit. In this blog post, I'm going to look at what's involved in connecting this board to my local network using the ESP-IDF SDK. The Waveshare ESP32-S3-ETH DevKit As the name suggests, it…

Hey. What problem are you hitting?

I’m really starting to struggle with messages and comments. I get them from different platforms. How do others manage this as I’m sure some slip through the cracks :(

Diesel is £1.98 at my local Shell!

This is amazing!

Plugged it into a wall socket???

I’m not sure anything is as expensive as petrol at the moment 🤣

Well, depends on the cost, no? Rapid charging is generally more expensive.

What led you to the Zappi?

I’ll be installing the pipes in a week or two. Then I need to cast the base, with heat pump going in around June!

You really need a way to limit the compressor, so the power draw stays low. Not sure that’s possible. It’s something I want to experiment when I get my heat pump!

I wonder what it does. Does it say?

I have limited the temperature range in the Home Assistant integration to match the app itself. This was to avoid confusion.

Heat Geek mode is new to me! How to I switch that on?

H has no WiFi. Just then Zigbee/thread radio.

Don’t think is stands for anything? They have S3, C6, C5, P4 etc.

Parts have arrived. USB connector fits! That’s a good start!

WebUSB and ESP32 In this post, I look at using WebUSB to send JSON to an ESP32 over a serial connection.

WebUSB and ESP32

In this post, I look at using WebUSB to send JSON to an ESP32 over a serial connection.