Nucleo-WL55JC1 + BME688: basic communication

[huytyskland]

Hello everyone,

Currently, I am working with the board Nucleo-WL55JC1 to communicate with the sensor BME688. However, I cannot have any response from it.

My goal is to receive the chip ID from the sensor.

My steps (based on the datasheet of BME688):

• I used I2C3 from the board to connect with the sensor.
• I set sensor in write mode by (HAL_I2C_Master_Transmit(&hi2c3, (uint16_t)I2C_ADDRESS, &chip_address_write, TXBUFFERSIZE, 10000)).
• I sent the register address from the board to the sensor in write more (HAL_I2C_Master_Transmit(&hi2c3, (uint16_t)I2C_ADDRESS, &chip_ID_reg, TXBUFFERSIZE, 10000)).
• I read the data from the sensor (HAL_I2C_Master_Receive(&hi2c3, (uint16_t)I2C_ADDRESS, (uint8_t *)aRxBuffer_testing, RXBUFFERSIZE, 10000)).

I2C_ADDRESS: the address of the sensor, chip_ID_reg: the register address of the chip ID, chip_address_write: address of the sensor in write mode, axRxBuffer_testing: the place to store received data from the sensor.

Even though the I2C transmissions were successful, I did not receive anything from the sensor. I am not even sure if my procedure and what I sent was right.

Do anyone have experience working with this sensor? Please give me some hint on communicating with it.

Thank you, Huy Nguyen.

[BSTRobin]

Hi huytyskland,

First, you should ensure your hardware is correct. You can refer BME688 schematic in data sheet or shuttle board;
Second, there is attached example code on STM32 for your reference.

[huytyskland]

Hello,

Thank you for your response. Can you be a little bit more detailed about the "hardware"? Do you mean that the wire should be correctly connected?

[BSTRobin]

Hi huytyskland,

If you used BME688 shuttle board, you can refer schematic https://www.bosch-sensortec.com/media/boschsensortec/downloads/shuttle_board_flyer/application_board..., and correctly connect with Nucleo-WL55JC1.