Multipurpose ESP8266 keychain

One of the best feature of the ESP8266 is it’s ability to self-host a web server, allowing for fairly complicated user interactions. The dEEbugger by [S-March] is a nifty little ESP8266 based device with a plethora of features in a small package.

The USB-powered device has a web user interface that enables it to be used as a low bandwidth oscilloscope, I2C terminal, or UART terminal. As an scope, you may connect to it via your tablet and then use it as a remote voltage monitor. There is a peak detection feature which is a nice touch and gives the …read more

Paul Jacob Evans


Adding a debugger to a Teensy 3.5/3.6

The Teensy is a powerful ARM-based development board with loads of features that can do fun stuff with USB as well. Like many dev boards, it uses a less powerful processor as an interface. Teensy designer [Paul Stoffregen] added a debug header to allow direct SWD JTAG access to the main chip, but the interface microcontroller has to be silenced for that to work, and the code to do so is still in progress.

Impatient, [Erich Styger] documents the changes he made to add support for the J-Link SWD protocol by removing the offending NXP Kinetis KL02Z that serves as …read more

Paul Jacob Evans