Feather Huzzah 32 Debug Shield

Name: Feather Huzzah 32 Debug Shield
SKU: 17971
Price: 5.00 USD
Availability: OutOfStock
Rating: 5.00 (2 reviews)

(2 Reviews)

A breakout board for making wiring up the ESP-Prog debug board really simple

Designed by Brian Lough in Ireland

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2019-09-03T16:47:11.057Z-Huzzah32 Debug.jpg

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$5.00

Out of Stock

Sold out since Nov 30, 2021

A breakout board for making wiring up the ESP-Prog debug board really simple

NOTE: This requires additional hardware other than just the ESP32 Dev board. Please read the "Additional Required Hardware" section What is it? It is a Shield/FeatherWing for the Adafruit Feather Huz…

What is it?

It is a Shield/FeatherWing for the Adafruit Feather Huzzah 32 ESP32 board that breaks out the JTAG pins to allow connecting an external debugger that enables you to debug your Arduino Sketches using Platform.io. With the debugger you can step through code and change the value of variables on the fly.

Why did you make it?

After watching Andreas Spiess' video on debugging your sketches using Platform.io, I thought a board that broke out the appropriate pins to a 10p IDC connector would be really useful. So instead of connecting your ESP32 board to the ESP-Prog via dupont wires, you can just use a 10P ribbon cable.

Additional Required Hardware

You will need the following:

ESP-Prog JTAG board, available from Aliexpress for around $20 delivered (It is also available on mouser, but shipping is very expensive to me at least)
Adafruit Feather Huzzah 32.

What comes with the kit?

1no. Feather Huzzah 32 Debug Shield PCB
1no. 10p IDC connector
1no. 30cm 10p Ribbon cable (This can be removed using the add on options if you chose, but please note, the ESP-Prog does not come with this cable)

Optional Add-ons

1 set of female jumper pins (1no 16p & 1no 12p)

Stackable Headers

The ideal headers to pair with this would probably be stackable headers, so you could even potentially use it inline with existing shields/featherwings (once they do not use the JTAG pins). I can not source these at a reasonable price so I would end up having to sell them at a much more expensive cost than Adafruit or other official resellers, so I don't see much point! Here are some links for where you can buy them

Used Pins

There are 4 GPIO pins that are used by this featherwing that can not be used for other purposes while debugging.

NOTE: GPIO13 is also the built-in LED pin on the Huzzah32 so the built-in LED can not be used while using this board.

ESP-Prog	Huzzah32 GPIO
TDI	12
TCK	13
TMS	14
TDO	15

Additional Info

Please note: I could not program the ESP32 (via it's own USB cable) while the ESP-Prog was connected to it. Disconnecting the ribbon cable worked.

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Brian Lough Shipping Policy:

We are currently limiting the amount we go out for social distancing reasons, and usually go to the post office once a week. Usually on a Wednesday or Thursday

Brian

Review Breakdown

Average Ratings

Product: (5.00)

Documentation: (5.00)

Shipping: (5.00)

Communication: (5.00)

Hamish | May 29, 2020

excellent gizmo

Perfect if you want an easy way to debug an esp32 feather!
just solder on the headers and off you go :)

Julian | Jan. 20, 2020

Just what I needed

Swift response from Brian on a question, and to check that I really didn't need the 10pin cable.
I used stacking headers (from pimoroni who are always excellent) and connected up via some jumper wires to a FT4232H CJMCU board which I already had. (My HUZZAH32 didn't have stacking headers, or I wouldn't have needed this board.)

I didn't experience the problem of not being able to program via the original USB cable. Selecting which method to use for programming via platformio.ini was as easy as changing the "upload_protocol" setting between "esptool" for serial, or my custom "cjmcu_4232" setting for JTAG, where most people would use "esp-prog". Debug is enabled for me by setting "debug_tool" to "cjmcu_4232" or for most people "esp-prog".

FWIW, I found it easiest to fork https://github.com/platformio/platform-espressif32 and https://github.com/espressif/openocd-esp32, then work from my checkout, using "platform = https://github.com/my/platform-espressif32.git" and "platform_packages = tool-openocd-esp32 @ https://github.com/my/openocd-esp32.git" so that changes I made to these wouldn't be overwritten by subsequent updates and I can rebase when there are updates that I want. Note that openocd needs to be configured, built and installed to the same platformio dir using "./configure --prefix=$(pwd)", but that seems to be a minor quirk.

$5.00