General • No DCF77 reception without wifi?

Hi everyone,

I am building a Pico based clock. I have both a Pico and a Pico W. I have already implemented time synchronization using NTP over the wifi feature of the Pico W. Now, I am trying to add DCF77 support to get synchronization on the Pico too.

I have purchased a so called "RC8000" DCF77 module and connected its output PIN to GP21. Now I am encountering this strange an illogical behaviour:
- using Pico: no signal on the OUT pin
- using Pico W: no signal on the OUT pin
- continue using Pico W and enable wifi by calling . Now I get the typical DCF77 100 and 200 ms pulses on the OUT pin!

I measured the voltage directly on the OUT pin to exclude any software problem. Given that DCF77 is completely independent of wifi, does someone have an idea what is going on here?

Statistics: Posted by Arnaud-j4k08 — Sun Nov 03, 2024 10:08 am — Replies 2 — Views 28

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