It all looked so simple. I had the video equipment set up and rolling. Assembled the (to my knowledge) first ever WiFi-Throwie. But those in the know might spot the problem right away in this picture.
Yes, the CR2032 battery totally caved in under the 70mA load of the ESP8266 / ESP-01 module.
And I should have known.
The typical discharge rate for a CR2032 is 0.2mA. I need about 350 times more, well knowing this wouldn't last for long.
I then learned the hard way that the internal resistance is obviously way too high.
TI has a document here, where they tried discharge currents beyond the recommended 15mA maximum. But they wouldn't go beyond 30mA. This blog article also confirms that.
So it's back to 18650 rechargeables. Or quite possibly CR123 if size matters.
EDIT; Ordered a CR123 and suitable battery holder today. I'll keep you posted.