I'm running a project with a nodeMCU DevKit and my project runs smooth if I run it connected through the usb wire to the computer.
I need to run my project using battery and I tried with a ICR14500 battery (3.7V and 700mAh). I connected the battery to the Vin pin but the NodeMCU doesn't send the data to the cloud.
When I run it with the battery I have detected some random behaviour, some times the led on the ESP8622 is blinking continiously and the total board power consumption is around 130mA!
Any idea what can be happening?