In my smart socket finishing project, I need to get current, power, energy and voltage data from Arduino Mega2560 so that I can display it on the website created by ESP32, but no matter which example I tried on the internet, I couldn't do it. What should I do?
Welcome to the forum
- Confirm that you are using an Arduino Nano ESP32, or not
- Post a sketch that you think should work, using code tags when you do
- Post a schematic of your project showing how the components are interconnected and powered
You can connect an ESP32 to an Arduino Mega2560 using UART (serial), I2C, SPI, Wi-Fi, or Bluetooth. UART is the simplest, using TX/RX pins to exchange data. I2C works for structured transfers using SDA and SCL lines, while SPI offers faster speeds but needs more wiring. Wi-Fi or Bluetooth are great for wireless communication. Choose based on your project's needs.
I have tried UART communication so far but I have not been successful. If I use a Bluetooth module, can I find an example code on the internet for data transfer? Is there a code block you can recommend?
To set up Bluetooth communication between an ESP32 and Arduino Mega2560, use the ESP32’s built-in Bluetooth and connect an HC-05 module to the Mega. Pair the devices (PIN usually 1234 or 0000) and use Serial to send and receive data. Use the BluetoothSerial library on the ESP32 and Serial1 on the Mega for communication. Simple example codes are available for both.
You still need UART to communicate with the BT module.
What was the output with your direct UART trial?
Do you actually need Mega in your setup or could Esp32 take care of everything?
Are you using a voltage converter between the two boards ?
Please answer the questions in post #2
