studentkra

My project of HMC253 and ESP8266 antenna switch on Github.

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GitHub - studentkra/HMC253: Antenna switch HMC253 and ESP8266

https://github.com/studentkra/HMC253

Antenna switch HMC253 and ESP8266. Contribute to studentkra/HMC253 development by creating an account on GitHub.

Not tested yet ))

I have an ESP running an attenuator right now. I wrote the program for ESP myself. Everything has been working fine for almost a year. It will not be difficult to rewrite the software for managing this switch. And I don't understand why to use a board with a relay. GPIO ESP will be enough.

I successfully use an external attenuator for KiwiSDR1. The attenuator is assembled on the PE4302 board and ESP8266. Control is via USB connection to KiwiSDR. The attenuator works in a simple automatic mode. At night, a signal attenuation of 15 dB is used. In the daytime, the signal attenuation is set to 5 dB. An algorithm for controlling the attenuator in an intelligent mode with feedback by reading the ADC_overvoltage values ​​was also developed. Attenuation is selected automatically several times per minute so that ADC overloads are as small as possible.

https://forum.kiwisdr.com/index.php?p=/discussion/2996/external-attenuator-for-kiwisdr-1