Sparkfun pulse sensor MAX32664 library write issue

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1

I recently purchased Sparkfun pulse sensor MAX32664 and interfaced with arduino mega and buno beetle ble, and got good result with your example code. But while interfacing with arduino nano BLE module, it arises a compilation error that
virtual size_t write(int data) with that of virtual size_t write (uint8_t data)

2

That happens when the write(int) and write(uint8_t) function signatures conflict in the Print class, which are inherited by HardwareSerial and SoftwareSerial. This often happens when using different Arduino core versions or if a library is expecting a specific signature…those boards use different cores

Thing to try:

  1. Explicitly Cast to uint8_t
    If the error is in your code, modify the call to write() by explicitly casting the argument:
Serial.write((uint8_t)data);
  1. Check Libraries
  • Ensure that the SparkFun MAX32664 library is compatible with the Arduino Nano BLE (which uses the nRF52840 chip).
  • Some libraries assume an AVR-based core, while the Nano BLE uses the Mbed OS-based core.
  1. Update or Modify the Library
    In the code, find the write() function definition and modify it to use uint8_t instead of int.
  2. Use an Alternative Serial Class
    If you’re using SoftwareSerial, consider using HardwareSerial or Serial1 (if available) to avoid conflicts with the write() function.