studentkra

I've been using SNR level logging, adc_ov, and the number of users for a long time. The charts are available as a web page, and it is located on the Kiwi server in the config folder as simple html file. The code was written a long time ago without using AI )) . That's why it looks ridiculous, but it works great. You can use it as a blank for your code.

I received an HMC253 (DC-2.5 GHz) board today for $8. I also have an ESP8266 for $2. These are the cheapest materials from which you can assemble an antenna switch controlled via USB.

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

I post firmware to control PE4302 attenuator via ESP8266 on GitHub now.

https://github.com/studentkra/PE4302_attenuator

It is theoretically possible to do the opposite. Implement KiwiSDR support in OpenWebRX+. I think it won't be very difficult, but I'm not sure anyone would want to do it.

My project of HMC253 and ESP8266 antenna switch on Github.

Not tested yet ))

Hello. KiwiSDR stopped working after the thunderstorm. The power supply goes into protection. There is a short circuit on the KiwiSDR power connector.

The BeagleBone board also stopped working. Separately from the KiwiSDR, the BeagleBone shows no signs of life and the TPS65217C chip is very hot.

The problem was not only in the failed transformer T301. The 5V power line had a resistance per mass of 5 ohms. 

All linear stabilizers are out of order. Three pieces LP5907 and LMR10530Y. Moreover, the LMR10530Y was pierced through. That is, the 5V input was connected to the 1V output.

For further diagnostics, the stabilizers were replaced with similar ones.

KiwiSDR is working, but additional testing is required.

I made a short video of this repair.

https://youtu.be/6Vtmoc8Z-Eg?si=PIFDW3fEnpm8zuwE

Since the main interference comes from the electrical wiring, you can try installing such a filter. As far as possible from the entrance of the electrical wiring in a private house.

@F5AFY ,

Yes. It seems that these plastic welding machines have a lot of power. I've also studied their specifications. The frequency range is 27-28 MHz. I'm even receiving a fifth-harmonic signal at 137-138 MHz, which interferes with the reception of NOAA and Meteor satellites.

Most likely, the CP2102 driver is already installed in Debian. For example of a Python script:

import serial
ser = serial.Serial('/dev/ttyUSB0', 115200)
ser.write("A1")
#A1 select antenna number 1