So I did an I2C scan on my sensors in order to establish what their I2C addresses were. All went through and I was able to identify their addresses. However, once I changed one of the addresses within the serial monitor, the connection between the CPU and the circuit (my sensor) is broken, and the sensor light shuts off. However, when I perform the scan to check if the address had changed, it says it has (from 0x64 [100 dec] to 0x66 [102 dec]). Any advice on what to do once I've changed the I2C address? Because I am currently getting no feedback (output: 255).
Thanks!
Update (5/29/2020): Issue was resolved, please disregard my question.