studentkra
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SNR Measurements allow for user variable time input [fixed in v1.813]
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.
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Antenna switch | Kits | Commercially available?
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Poll: Remove electronic attenuator in future Kiwi-2 builds
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
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Antenna switch | Kits | Commercially available?
I post firmware to control PE4302 attenuator via ESP8266 on GitHub now.
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Any plans to move to OpenWebRX Plus? [not possible, makes no sense]
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Antenna switch | Kits | Commercially available?
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Repairing KiwiSDR receiver after thunderstorm.
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.
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Which ever neighbor this is - I hate you.
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What are these downchirp transmissions ?
@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.
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Antenna switch | Kits | Commercially available?