ESP32 Book

August 31, 2017

Members of ESP32.com forum will recognise Neil Kolban as one of its more prolific commentator and posters. As well as his great contributions to the forum he has also put together a great book on the ESP32 hardware and software. He constantly reviews and keeps it up to date so its a bastion of ESP32 knowledge. You can find a copy here:

 

https://leanpub.com/kolban-ESP32

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Setting up RPi MIDI #2

July 27, 2017

In a previous post on setting MIDI baud-rates on the RPi I used a slight of hand (i.e. init_uart_clock etc.) to trick the RPi in setting the UART to a 31250 baud needed for MIDI. While browsing the Raspberry Pi forum I spotted this nugget of information from PhilE:

in config.txt add:

enable_uart=1
dtoverlay=pi3-miniuart-bt
dtoverlay=midi-uart0

 

This combination does three things:

1) Enables the UART. It isn’t strictly necessary when combined with pi3-miniuart-bt
2) Reassigns the weaker UART (ttyS0) for Bluetooth and frees ttyAMA0 for our MIDI interface
3) Using an DT overlay to achieve the same UART clock settings as our init_uart_clock etc. trick

It makes things a lot simpler 🙂


ESP32 getting started..

June 28, 2017

I’ve been playing around with the ESP32 modules I got last month. Getting ESP32 working with Arduino IDE was pretty easy (see link below). I’ve now on to harder things, getting the ESP32 SDK and Eclipse installed.

Here’s a few links to ESP32 sites I’ve found useful:

http://esp-idf.readthedocs.io/en/latest/get-started/index.html
https://github.com/espressif/arduino-esp32
http://randomnerdtutorials.com/installing-the-esp32-board-in-arduino-ide-windows-instructions/
https://www.esp32.com
ESP32 Tutorials
How to Get Started with the ESP32
View story at Medium.com
https://learn.sparkfun.com/tutorials/esp32-thing-hookup-guide

 

 


ESP32 at last

May 29, 2017

After a couple of failed attempts I’ve finally got my hands on a ESP32 module.

My first couple of ebay purchases failed to arrived, which is becoming a regular thing with ebay at the moment.

I’ve got a couple of ideas for using the WIFI in a standalone WIFI hub, so its time to fire up the soldering iron


Maker Faire UK 2017 report

April 26, 2017

Maker Faire UK was another great success this year


Countdown to Maker Faire UK 2017

March 28, 2017

It’s hard to believe but Maker Faire UK is almost upon us again.

It’s on this Saturday and Sunday 1st and 2nd April at the Centre for Life in Newcastle.

Full details are here:

http://www.makerfaireuk.com/

I’m planning on taking my latest Raspberry Pi Synth along, something I’ve called unimaginatively PiZynth. As well as the pi synth I’ll have my Pi based R-Kade Mini.

So two full days of maker stuff to look ahead too. 🙂


Sick of Beige (SoB) board – RS232, 2-ch Relay and Prototyping board

February 25, 2017

Following on from last months post about my SoB DB9 breakout board I’ve design a few of more SoB breakout boards using the DP5050 footprint.

sb_relay2_small

The first is a 2-channel Relay Board. It has two relays with LED’s to indicate when they are active. Using it is pretty easy as it features the choice of screw terminals or pin headers to interface to it.

sb_rs232_small

The next is a universal RS232 breakout. I call it universal as all the pins (8 in total but not ground) from a 9-way RS232 DB9 are broken out onto pin headers. To connect up to these are the 4 signals (T1,T2,R1 and R2) from a MAX232 (or equivalent) RS232 chip. So you can swap around the transmit and receive and handshake signals as you like.

sb_protoboard_pcb_small

The next board is just a classic prototyping board. There’s not much too say about this board.

sb_sympsu_pcb_small

The last board is a symmetric power supply for rectify AC voltage into positive and negative DC supply rails. I’m hoping to use this for a audio project I’ve got in the works.

Dangerous Prototypes (DP) have a great page describing the various PCB sizes here:

http://dangerousprototypes.com/docs/Sick_of_Beige_standard_PCB_sizes_v1.0

As usual you can find them on my Tindie page here