A WiFi, NTP controlled clock with an ESP8266 dev mod running NodeMCU/Lua
- LoLin ESP8266 developer module (with voltage regulator and USB-serial)
- two small breadboards
- a MAX7219-driven 8-digit 7-segment display, SPI interface
- five jumper wires:
3V -- VCCG -- GNDD7 -- DIND8 -- CSD5 -- CLK
- NodeMCU build with modules:
bit, gpio, http, net, node, rtctime, spi, tmr, wifi
- flashing software, e.g.
esptool
- display driver https://github.com/steve8x8/nodemcu-max7219 (fork of https://github.com/marcelstoer/nodemcu-max7219 with scrolling support and more)
font7seg.luamax7219.lua
- a tweaked
init.lua(inspired by https://nodemcu.readthedocs.io/en/master/en/upload/#initlua) - to connect to one of multiple wifi networks, set up your
credentials.lua - you must set the offset from UTC of your timezone in
utc_offset.lua - a
payload.luathat tries to combine it all - upload software, e.g.
luatool