[VK2TPM] Simple WSPR Beacon using Si5351 and ESP8266 NTP for time sync

[VK2TPM via rec.radio.amateur.moderated Admin]

marxy's musing on technology

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Simple WSPR Beacon using Si5351 and ESP8266 NTP for time sync

Posted: 07 Sep 2021 12:44 AM PDT
http://blog.marxy.org/2021/09/simple-wspr-beacon-using-si5351-and.html

Wanting to play with a simple WSPR Beacon in the house where I can't
receive GPS for time synchronisation, I've hacked together a beacon using
an Si5351 oscillator and an ESP8266 board that joins my Wifi and gets the
time from an NTP server.Here's the rig:It starts off by joining Wifi, then
requests the time from time.nist.gov. Next it figures out how many seconds
to wait before the next 2 minute