A while ago we did a tutorial on how to reverse engineer USB protocols using a USB logic analyzer, for when you have to develop your own USB drivers (say for a product that only comes with Microsoft support!) We also wanted to point out that if all you’re doing is debugging or reverse-engineering a basic product that uses serial (a COM port) you don’t need to shell out for a analyzer box! Instead you can use a serial port monitor, a piece of software that can spy on the COM port. These can also be handy when you have to debug software you wrote – to see what’s really going out on the hardware.
We tend to need to reverse-engineer stuff in windows so we use a nicely written piece of software called PortMon. Its a little old but it works great!
For example, while reverse engineering how to use our serial JPEG camera, we had a windows software that could control the camera but we wanted to port it to Arduino (or any microcontroller really). Since the software used a serial COM port, we started up PortMon, then started up the driver software
Then whenever data was sent back and forth, we’d get the data in HEX. For example here you can see the first READ (data sent out to the camera) as “76 00 31 00 00” and the WRITE (reply from the camera to the computer “56 00 31 0C 01…”
8-6-2021 (August 6, 2021) is the Snakiest day of the year and it’s also this year’s CircuitPython Day! The day highlights all things CircuitPython and Python on Hardware. See you there!
Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, TinyGO, or even use the Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for CircuitPython, MakeCode, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.
Have an amazing project to share? The Electronics Show and Tell is every Wednesday at 7pm ET! To join, head over to YouTube and check out the show’s live chat – we’ll post the link there.
Join us every Wednesday night at 8pm ET for Ask an Engineer!
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Python for Microcontrollers — Python on Microcontrollers Newsletter: EuroPython 2021, CircuitPython 7.0.0 alpha 5 and more! #Python #Adafruit #CircuitPython @micropython @ThePSF
Adafruit IoT Monthly — Forest Fire Beacons, IoT for Beginners, and more!
Microsoft MakeCode — MakeCode for the micro:bit - 2021 Release!
EYE on NPI — Maxim’s Himalaya uSLIC Step-Down Power Module #EyeOnNPI @maximintegrated @digikey
New Products – Adafruit Industries – Makers, hackers, artists, designers and engineers! — New Products 7/28/21 w/ Adafruit MCP9601 (MCP96L01) I2C Thermocouple Amplifier – STEMMA QT /Qwiic!
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