I want to connect my LCD and Max30100 sensor in UNO R3. I used to follow Jeremy Blum's Tutorial 7: I2C communication, but I there's no "Wire.receive();" and "Wire.send();" in library of <Wire.h> to receive data input in Max30100, yet the LCD is functioning. Only It didn't receive any data from Max30100.
Can someone, please help me with this. This is my first time to deal with I2C bus. It really help me alot.
Here is an example of how to do it:
https://create.arduino.cc/projecthub/protocentral/using-the-max30100-wearable-pulse-sensor-with-arduino-9b6984
Thank you so much johnwasser.
One last thing sir, how can I run two sensors (max30100 and VL53L1X) in I2C bus? I REALLY DON'T how to tell to UNO that you need to get an input data from this sensor or that sensor.
I am confuse on where to begin and how to begin. May someone reading this will help me.
Sincerely,
CHARLIE
iamphysics:
how can I run two sensors (max30100 and VL53L1X) in I2C bus? I REALLY DON'T how to tell to UNO that you need to get an input data from this sensor or that sensor.
Each device on the I2C/TWI/Wire bus has an address. The datasheet for each device tells you what the address, or choice of addresses, is for that device. As long as they don't have the same address they can be used separately.
If you are using a library (recommended) to acess a device, either the library knows the correct address or there is a way to tell the library which address to use.
I used Max30100 library, I2C LCD library and Wire. The Max301000 works prefectly fine in serial monitor and in the LCD. HOWEVER, everytime I change the power supply from USB to adapter, I must first plug out the USB cord from laptop and insert a 5V adapter to UNO. When the UNO power up, I reset the UNO to read again the code, but the max30100 won't work. The lcd display different.