

T_GY21.remove(4,1) //remmove one Decimalįloat T_LM75_S = LM75.A summary of everything shown below is available further down this page: #define OLED_RESET 4 // Reset pin # (or -1 if sharing Arduino reset pin)Īdafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET) ĭisplay.begin(SSD1306_SWITCHCAPVCC, 0x3C) // Initialize OLEDįloat T_GY21_S = sensor.readTemperature() //Temperature of GY21 Sensor Declaration for an SSD1306 display connected to I2C (SDA, SCL pins) #define SCREEN_HEIGHT 64 // OLED display height, in pixels #define SCREEN_WIDTH 128 // OLED display width, in pixels Stop: After the completion of all data, at first, the SCL line changes from Low to High and then the SDA line will change from High to Low.

WIRE LIBRARY I2C FULL
Pay attention that at the end of each data transition, the receiver must put the ACK bit in Low level to indicate full proper transition.

After the address is sent, each slave compares it to its own address and in case it matches, the module will send a single bit (ACK Bit) in Low level to the master. These 7 bits (the address) is always sent from the master toward the slaves.
WIRE LIBRARY I2C SOFTWARE
Generally speaking, this problem can be solved in both software and hardware. If you’re having the same problem, this tutorial can be helpful for you. This problem is a serious one which we all have definitely come across with at least once. But, if 2 or more of the modules had the same I2C address, we would face some apparently unsolvable problems in using them all. If they all have different I2C addresses, we could easily interface them, facing no serious trouble. Sometimes, we have interfaced some I2C modules with a microcontroller in our projects. In a lot of projects, we have used different modules and sensors that support I2C communication protocol.

Have you ever wanted to use 2 sensors with the same I2C address at the same time, not knowing what to do? Faced some serious challenges in doing that?
