ESP32: A Fatal Error

September 1st, 2018

If you get this message when trying to flash an ESP32:

A fatal error occurred: Failed to connect to ESP32: Timed out waiting for packet header

You may need to reboot it while flashing so the computer will recognize it. You should be able to trigger a reboot into flashing mode by holding down the BOOT button and giving the EN button a press. Do this while the esptool is “Connecting…”, and it should connect and write with no issues. You may need to try this several times before the tool will see it and connect.

This is what a successful flash looks like:

# make -j flash
Python requirements are satisfied.
Flashing binaries to serial port /COM4 (app at offset 0x10000 )...
esptool.py v2.5.0
Serial port C:/msys32/COM4
Connecting........_
Chip is ESP32D0WDQ6 (revision 1)
Features: WiFi, BT, Dual Core, 240MHz, VRef calibration in efuse
MAC: xx:xx:xx:xx:xx:xx
Uploading stub...
Running stub...
Stub running...
Configuring flash size...
Auto-detected Flash size: 4MB
Flash params set to 0x0220
Compressed 21184 bytes to 12571...
Wrote 21184 bytes (12571 compressed) at 0x00001000 in 1.1 seconds (effective 151.3 kbit/s)...
Hash of data verified.
Compressed 138336 bytes to 68372...
Wrote 138336 bytes (68372 compressed) at 0x00010000 in 6.1 seconds (effective 181.4 kbit/s)...
Hash of data verified.
Compressed 3072 bytes to 103...
Wrote 3072 bytes (103 compressed) at 0x00008000 in 0.0 seconds (effective 1068.5 kbit/s)...
Hash of data verified.

Leaving...
Hard resetting via RTS pin...

BMF: A New Project

June 4th, 2016

I have a new project, in a completely new sector to me. The experience so far has been an interesting one, between researching the industry, and working out how and what I want to build.

Today’s challenge is figuring out how I want to write the code. I’m trying to hold a balance between work that won’t be too hard to clean up later, and work that won’t take me a ton of time now. This of course meant I had to decide between static classes, dependency injection, and some sort of factory. So far, static classes wins out, because it’s not a ton of work to do.

I’m sure I’m going to regret this decision later on.

Javascript Element Properties From Object

December 19th, 2013

How to create a HTML tag, using an object of properties.

[code]$(‘#somediv’).append($(‘<a/>’, {href: ‘#’, id: ‘dothing’, text: ‘Do Thing’}));[/code]

PHP Class To Color CLI Output

July 31st, 2013

A guy named JR posted this nifty piece of code to help color CLI output in bash from PHP scripts

And this user on GitHub cleaned it up a bit and posted a Gist of it.

Which Framework?

July 21st, 2013

Learning a framework is an investment of time. You have to work out how this one structures its files, wants you to template, what levers to pull.

This is why people build their own so often. At least then it works the way you want it to.

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