Interfacing MAX232/TTL with ESP32S

Projects Programming
21

Yes, exactly

22

Are you using 30-pin ESP32 or 36-pin ESP32? I am using 30-pin ESP32 which has TX2/RX2 inscribed and NOT TX1/RX1.

While data is coming as byte in ASCII format, why have you declared int type other than char type though int type works?

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  1. I am using ESP32S3-DEVKITC-1 N8R2
    Datasheet: ESP32-S3-DevKitC-1 v1.1 - ESP32-S3 - — ESP-IDF Programming Guide latest documentation
  2. I am using the exmaple from Arduino IDE (examples -> communications -> multiserial)
    You can declare it char, both work well.
    I will change it to char
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24

As next i will try if i can upload the code to my ESP32S3 using RS323

25

How?

The Bootloader Program of ESP32 communicates with Serail0 (UART0) port to receive sketch data from IDE for onward storing in the flash memory.

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It will be only a try

27

Not working

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