PT6302 and M5stack Atom required
din -> 33; // DA
clk -> 23; // CK
cs -> 19; // CS
Reset -> 22; // RS
en = 3.3v; // I used a LDO (silk 662k) to get 3.3v from vcc.
vc = 5v;
gnd = ground;
VFD https://item.taobao.com/item.htm?spm=a1z09.2.0.0.ee152e8dKx4Jtn&id=597649622906&_u=b2dg56lp25bd
SOC https://item.taobao.com/item.htm?spm=a1z09.2.0.0.ee152e8dKx4Jtn&id=611064238273&_u=b2dg56lpa2d2
https://randomnerdtutorials.com/esp32-date-time-ntp-client-server-arduino/