This post will cover how to use the Sonoff RF Bridge hardware as a wifi scanner and display its results in Node Red. Here is a high level view of what will be covered. The hardware is an IoT device intended as a gateway between 433 Mhz sensors and a wifi network. That purpose will be abandoned. Instead the device will be modified to allow it to be programmed using a serial to usb converter. With that, firmware will be…
In the last post, I covered how to generate audio natively with the ESP8266 module. The hardware to do this is rudimentary. I demonstrated how to generate CW (Morse Code), DTMF, synthesized speech, and audio. This post will expand on some of those concepts by decoding CW and DTMF signals. The following Fritzing wiring diagram will be the foundation for all of the code covered in this post. The Encode Module will be the signal source for the Decoding modules. …
This story inspired the work covered in this post. There has been little in regards to micro controller audio covered in this blog. So I hope to cover briefly some supported audio features of the ESP8266 in this post. The goal here was to use the least amount of hardware, software, and effort to generate audio. The following Fritzing wiring diagram will be the foundation for all of the code covered in this post. There will not be any low…