@Gene , here is a pic of what i made. Nothing special really… The module is a ESP01, Super cheap, can get these for about $1.50 each from Aliexpress… If i really wanted to make an ultra low power device that runs on solar, then i would go with ESP8285 and put the device into deep sleep that only uses 20uA and connect a Solar panel and some super capacitors 5.5V@1.5F that should be enough to run this for a while in deep sleep mode forever really.
