Power on reset fails when I power a blue pill from batteries

[xisco]

Hello,

I made a project using a blue pill. It works when is powered through st-link (3,3V).

When I power this board from two AA batteries (~3V), the board does nothing until I press the reset button.

An STM32F103 should work from 2 to 3,6 V, according to its datasheet, or I need to adjust something?

[jiangfan]

comments:

1. monitor the 3V (two AA batteries) with scope, to see if 3V voltage is stable during power on of the board

2. in case you have the source project, just debug it to see if it works as expected with power from the 3V (two AA batteries) supply

[waclawek.jan]

It's very unlikely that what you have on a bluepill is a genuine STM32, so the STM32 datasheet does not apply.

JW