I2C

Material

• Heltec Wireless Stick Lite ESP32
• Seeed Xiao SAMD21

Connection

        Lite <-> Xiao
SDA :   4           4     
SCL :   15          5     

Code

• Flash I2C.ino to Xiao
• Run notebook I2C_MicroPython on Lite or I2C_Python on Raspberry Pi
• Lite or Raspberry Pi ask the length of a string first and then read the string