MyOldPCS

I want to tell you about the rather inexpensive YD-RP2040 module and show some examples of working with it. Photos and Schematics Top view: Bottom view: The module’s electrical schematic can be found here https://github.com/initdc/YD-RP2040/blob/master/YD-2040-2022-V1.1-SCH.pdf Differences from the original Raspberry Pi Pico This board has several key hardware differences from the standard Raspberry Pi Pico module. Key changes:  - Flash memory : The module can be fitted with a larger Flash memory capacity — 4MB (32Mbit) or even 16MB (128Mbit) instead of the 2MB in the original.  - Voltage regulator : The DC-DC step-down converter is replaced with a cheaper and less efficient linear regulator. This has freed up pin GPIO23, which was used to control the DC-DC converter in the original Pico.  - RGB LED : A WS2812 addressable LED (Neo-pixel) is connected to the freed GPIO23 pin. Unlike the original Pico, this board has two additional buttons:  - RESET — for a ...

Chromecast is both a small media player from Google and a protocol for building media applications. Many TVs (Sony, Philips, TCL) and other players (Mi Box) support this protocol. Let’s look at the basics of this architectural solution: Device Discovery — Implemented via mDNS, using the _googlecast._tcp namespace. $ avahi-browse -r _googlecast._tcp = wlp0s20f3 IPv6 Chromecast-8483c593f9fe704813a5fd6d1e330e19 _googlecast._tcp local hostname = [8483c593-f9fe-7048-13a5-fd6d1e330e19.local] address = [fe80::e9e6:e06:54b5:ad52] port = [8009] txt = ["rs=CpuLoad" "ct=243D5A" "nf=1" "bs=FA8FCA5A3BCC" "st=1" "ca=463365" "fn=Chromecast" "ic=/setup/icon.png" "md=Chromecast" "ve=05" "rm=63F5EA264E7C9F1B" "cd=34D0CB70278B5433B344012D67742914" "id=8483c593f9fe704813a5fd6d1e330e19"] Sender — Chromecast uses a standard client-server architecture...