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The article claims that the ESP32 costs $5. The reality is around half of that for the MCU, and around $3 for pre certified modules including crystal, PCB antenna or UF-L connector. So it's really affordable. Espressif has also launched a new ESP32C3 based on RISC-V, with modules priced at around $2.
cant wait until they can make a dual-core risc-v but p.happy on the -s3
I can attest to the challenges of the section on Dynamic analysis on real hardware and the struggles of attenuating signal interference on the ESP. Anyone have a recommendation on conducting fabric for RF isolation as briefly mentioned in the article or resources on the subject of rf isolation/Faraday cages for microcontrollers?
The section on trying to attenuate outside wifi signals interested me. There is a bunch of hand wavy information on building faraday cages online, some people suggesting to utilize a microwave oven, since they operate at the same frequency. There are even wifi faraday cages for sale on amazon. However I can't really find much actual benchmark data online about how well these various approaches actually attenuate sign…
I have no idea what my first project should be. Any ideas?
I picked up an ESP32 devboard recently. I've always been intrigued by embedded but don't have a background in it at all. I have no idea what my first project should be. Any ideas?
Then, connect an RGB LED and experiment with PWM signal generation.
Then, experiment with network programming, accepting a UDP packet to the ESP32 that sets the color of the RGB LED.
I picked up an ESP32 devboard recently. I've always been intrigued by embedded but don't have a background in it at all. I have no idea what my first project should be. Any ideas?
I picked up an ESP32 devboard recently. I've always been intrigued by embedded but don't have a background in it at all. I have no idea what my first project should be. Any ideas?
Make an LED blink. Then, connect an RGB LED and experiment with PWM signal generation. Then, experiment with network programming, accepting a UDP packet to the ESP32 that sets the color of the RGB LED.
The section on trying to attenuate outside wifi signals interested me. There is a bunch of hand wavy information on building faraday cages online, some people suggesting to utilize a microwave oven, since they operate at the same frequency. There are even wifi faraday cages for sale on amazon. However I can't really find much actual benchmark data online about how well these various approaches actually attenuate sign…
If the product doesn't list some form of dB loss (at at least 1 frequency) I assume it's more or less just a standard box. Sometimes that'll be right, sometimes it won't. Some of it comes down to how you use the box as well. If you're feeding un-isolated power in via a big hole in the back then it doesn't really matter how perfect the front is at blocking signals. I'm surprised their paint can only gave them a 10 dB…
Out of random interest I tested the "put a phone in it and call it" and it didn't work (as did wifi) that's mentioned in [2].
[1] https://www.hea.de/fachwissen/mikrowellen/sicherheit
[2] https://www.sfu.ca/phys/346/121/resources/physics_of_microwa...
Earlier quoted context omitted.
Make an LED blink. Then, connect an RGB LED and experiment with PWM signal generation. Then, experiment with network programming, accepting a UDP packet to the ESP32 that sets the color of the RGB LED.
Alternatively, you can go high-level immediately - instead of accepting a UDP packet to set the color, run a webserver on it with functionality to change the RGB LED color that you can access from any browser. Modern microcontrollers have enough resources to just spend them like that.