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ESP32 get data from max17043

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Dec 5, 2022
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Dec 5, 2022
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So I got this esp32 board https://www.waveshare.com/wiki/E-Paper_ESP32_Driver_Board and I successfully connected it to a screen and displayed text, and got the power from a 3.7v lit battery connected to max17043 that is also connected to a tp4056. Problem is when I try to connect the SCL and SDA to the board it stops displaying anything on the screen. i connected the SCL to the SCK and the SDA to SD1 Any idea what am I doing wrong?
 

Harald Kapp

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Show us a circuit diagram. Understanding your circuit from the textual description is prone to errors on both sides.
 

Harald Kapp

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Does the ESP stop completely? Check with a simple "blink" program with both display and battery circuit connected.
Do you use separate SPI channels? When you use the same PSI channel for both display and battery circuit, you need to implement an additional chip-select logic (which is not shown in your diagram) as explained e.g. here.
 
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