-
This example will show you how to use I2C module:
- read external i2c sensor, here we use a MPU6050 sensor for instance.
- master:
- GPIO14 is assigned as the data signal of i2c master port
- GPIO2 is assigned as the clock signal of i2c master port
- Connection:
- connect sda/scl of sensor with GPIO14/GPIO2
- no need to add external pull-up resistors, driver will enable internal pull-up resistors.
make menuconfig
- Set serial port under Serial Flasher Options.
Build the project and flash it to the board, then run monitor tool to view serial output:
make -j4 flash monitor
(To exit the serial monitor, type Ctrl-]
.)
See the Getting Started Guide for full steps to configure and use ESP-IDF to build projects.
I (0) gpio: GPIO[14]| InputEn: 0| OutputEn: 1| OpenDrain: 1| Pullup: 1| Pulldown: 0| Intr:0
I (0) gpio: GPIO[2]| InputEn: 0| OutputEn: 1| OpenDrain: 1| Pullup: 1| Pulldown: 0| Intr:0
I (0) main: *******************
I (0) main: who_am_i: 68
I (0) main: TEMP: 26.51
I (0) main: sensor_data[0]: -1288
I (0) main: sensor_data[1]: 8796
I (0) main: sensor_data[2]: 11088
I (0) main: sensor_data[3]: -3408
I (0) main: sensor_data[4]: -223
I (0) main: sensor_data[5]: 67
I (0) main: sensor_data[6]: -11
I (0) main: error_count: 0
I (0) main: *******************
I (0) main: who_am_i: 68
I (0) main: TEMP: 26.55
I (0) main: sensor_data[0]: -1224
I (0) main: sensor_data[1]: 8748
I (0) main: sensor_data[2]: 11084
I (0) main: sensor_data[3]: -3392
I (0) main: sensor_data[4]: -318
I (0) main: sensor_data[5]: 235
I (0) main: sensor_data[6]: 21
I (0) main: error_count: 0