SerialTransfer.h

Projects General Guidance
1

Using the SerialTransfer Examples i2c_rx_data and i2c_tx_data as-is with IDE 1.8.15 and either uno or nano boards works just fine. However, if I use a nano with i2c_tx_data and an ESP32 with i2c_rx_data, the ESP32 does not respond in the Serial Monitor. There are no errors in compiling or uploading. Standard SCL and SDA pins with the nano and pin 21 (SDA) and pin 22 (SCL) for the ESP32. I would appreciate any guidance here and if PowerBroker2 might comment.

I'm hoping I selected to correct category. My apologies if not.

2

5V versus 3.3V?

3

Thank you, that had not occurred to me. So, I put in 2 ESP32's as tx & rx just in case and still no luck.

5

As I had been referring to I2C, I used 2 x ESP32 rather than a nano & ESP32. And per your other comment, Mr. Teo Swee Ann (founder and CEO of Espressif) has confirmed some time ago that both ESP32 and ESP8266 pins are 5v tolerant.
Anyway this can be closed now as I have it solved.

6

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