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Timeline for STM32F4 and SIM800L logic level

Current License: CC BY-SA 4.0

6 events
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Aug 18, 2020 at 10:21 comment added Chris Stratton @user362759 the resistor ratio depicted is for 3.3 v to 2.8 v, at least if that is a 5.6 K resistor.
Jul 25, 2019 at 13:44 history edited Abhi CC BY-SA 4.0
Added interfacing diagram
Jul 24, 2019 at 18:55 review Low quality posts
Jul 24, 2019 at 19:55
Jul 24, 2019 at 18:54 comment added user362759 My MCU has no 5V UART
Jul 24, 2019 at 18:47 history edited Abhi CC BY-SA 4.0
Added snapshot of the datasheet instead of a link
Jul 24, 2019 at 18:36 history answered Abhi CC BY-SA 4.0