I'm attaching an image showing both versions:
IoTMike wrote:I use deep-sleep mode on these, which means I have to run a jumper from the ESP8266 chip pin 8 (GPIO16) to RST;
I was looking to make some battery-operated push buttons that sent an MQTT message. An instance of Home Assistant would be consuming the message. That means I am going to be researching any battery-saving, for example, deep sleep.
So first thanks, I was getting ready to order some ESP 01 and ran into the question between that and the S model. Your post leaned me to the non-S model. I still have to do my homework, but ...
Any other 30,000 foot words of wisdom on the subject?
Any exceptions on battery life?
May I ask what your application was?