Ty and Ian,
Great news! While carefully reviewing my flashing procedure, i saw the lines about having the Exact versions of libraries:
The library versions below NOTE: You need to have EXACTLY the library versions in order to get a clean compile!
#include <WiFiManager.h> //
github.com/tzapu/WiFiManager
(0.15.0)
#include <ArduinoJson.h> //
github.com/bblanchon/ArduinoJson
(5.13.2)
#include <TimeLib.h> //
playground.arduino.cc/code/time
(Margolis 1.5.0) //
github.com/michaelmargolis/arduino_time
I made those adjustments, reflashed everything with the latest firmware from the repository, and voila! I now have 5 fully working clocks!
I'm sooooo happy!
Interestingly, the order of factory flashed chips also arrived today. On one clock, the combination of my newly flashed ESP8266 and the factory 3.01 chip resulted in the clock not found! error. Replacing the Atmega with a freshly flashed one fixed the problem.
Thanks for all your help!
Time to build some cases!
You can note this thread resolved.
Tim