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# I2C Component
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* I2C Modules
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| Item | Board | Chipset | Address |
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| --------------------------------------- | ---------- | ----------- | --------------------------------------------- |
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| 3-Axis Magnetic Electronic Compass | GY271 | HMC5883L | 0x1E |
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| 3-Axis Magnetometer Acceleration Sensor | GY-LSM303C | LSM 303C | accelerometer : 0x1D, magnetometer : 0x1E |
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| Infrared Temperature Sensor | GY-906 | MLX90614ESF | 0x5A |
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* Datasheet
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+ [HMC5883L](https://cdn-shop.adafruit.com/datasheets/HMC5883L_3-Axis_Digital_Compass_IC.pdf)
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+ [LSM303C](https://www.mouser.com/datasheet/2/389/lsm303agr-954987.pdf)
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+ [MLX90614ESF](https://www.melexis.com/-/media/files/documents/datasheets/mlx90614-datasheet-melexis.pdf)
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* Schematic
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+ [LSM303C](https://www.tme.eu/Document/3efb39d16e2f2e2f9f16bb5c89784b47/POLOLU-2127.pdf)
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+ [Adafruit LSM303C](https://learn.adafruit.com/lsm303-accelerometer-slash-compass-breakout?view=all)
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* Arduino Library
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+ [GY271](.\arduino-lib\Mecha_QMC5883L)
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+ [GY-906](https://github.com/adafruit/Adafruit-MLX90614-Library)
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* Tutorial
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+ [GY271](https://www.instructables.com/id/Tutorial-to-Interface-HMC-5833L-With-Arduino-Uno/)
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+ [GY-LSM303C](https://learn.adafruit.com/lsm303-accelerometer-slash-compass-breakout/coding)
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+ [GY-906](https://create.arduino.cc/projecthub/SurtrTech/contactless-temperature-sensor-mlx90614-1e7bc7)
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* ESP8266
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+ Software controlled
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+ pin assignment defined
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```
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C:\Users\<user>\Documents\ArduinoData\packages\esp8266\hardware\esp8266\2.7.4\variants
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```
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+ SCL / SDA pinout
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Description | SCL | SDA | Remark
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---|---|---|---
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Official | MTMS (GPIO14) | GPIO2 |
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Try | GPIO0 | GPIO2 |
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generic esp8266 | GPIO5 | GPIO4 | Wire() Default for generic esp8266
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+ The change Wire default, update begin(SDA, SCL)
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```
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Wire.begin(2, 0)
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```
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* ESP32
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+ Hardware Controlled
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+ Pinout
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Description | SCL | SDA | Remark
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---|---|---|---
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Official | GPIO22 | GPIO21 | Default
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