Chat-GPT is better if you make the correct question
![Big Grin Big Grin](https://forum.openmarine.net/images/smilies/biggrin.png)
But in this case ChatGPT tell me :
"""To use the Pass-Through Mode of the MPU-9250's auxiliary I2C bus, you need to follow these steps:
Connect the external sensors you want to communicate with to the AUX_DA and AUX_CL pins of the MPU-9250.
Set the MPU-9250 into Pass-Through Mode by configuring the appropriate registers. The specific register and bit configuration can vary depending on the MPU-9250 library or code you are using. Refer to the MPU-9250 datasheet or the documentation of your chosen library for the exact register and bit values.
Once the MPU-9250 is in Pass-Through Mode, the auxiliary I2C bus control logic of the MPU-9250 is disabled, and the AUX_DA and AUX_CL pins are connected to the main I2C bus using internal analog switches.
Use your main I2C bus and the corresponding I2C library or functions provided by your microcontroller to communicate with the external sensors connected to the AUX_DA and AUX_CL pins. Treat the external sensors as if they were directly connected to the main I2C bus.
By using the Pass-Through Mode, you can establish direct communication between your microcontroller and the external sensors connected to the auxiliary I2C bus of the MPU-9250. This allows your microcontroller to act as the I2C master, controlling and exchanging data with the external sensors.
Please note that the specific configuration and implementation details may depend on the MPU-9250 library or code you are using. It's recommended to consult the documentation and examples provided with the library or code for further guidance on utilizing the Pass-Through Mode for the MPU-9250's auxiliary I2C bus."""
I find the datasheet that i attached... As i want to understand more, also if i don't have a specific formation but i'm only a self-taught, i would like to understand how to connect the bpm280 in pass-though mode (pag. 23)... only to see if i can know something new.
Is correct the anwer of chatGPT? And how i can find the libreries that openplotter is using and eventually cange it? (if it is this the correct way)
If someone have time to explain me how to do it i would be very gratefull (also if i'm going to use baltika_no_9 suggestion/solution).
(2023-05-24, 06:08 PM)luchin0 Wrote: [ -> ]Chat-GPT is better if you make the correct question
But in this case ChatGPT tell me :
"""To use the Pass-Through Mode of the MPU-9250's auxiliary I2C bus, you need to follow these steps:
Connect the external sensors you want to communicate with to the AUX_DA and AUX_CL pins of the MPU-9250.
Set the MPU-9250 into Pass-Through Mode by configuring the appropriate registers. The specific register and bit configuration can vary depending on the MPU-9250 library or code you are using. Refer to the MPU-9250 datasheet or the documentation of your chosen library for the exact register and bit values.
Once the MPU-9250 is in Pass-Through Mode, the auxiliary I2C bus control logic of the MPU-9250 is disabled, and the AUX_DA and AUX_CL pins are connected to the main I2C bus using internal analog switches.
Use your main I2C bus and the corresponding I2C library or functions provided by your microcontroller to communicate with the external sensors connected to the AUX_DA and AUX_CL pins. Treat the external sensors as if they were directly connected to the main I2C bus.
By using the Pass-Through Mode, you can establish direct communication between your microcontroller and the external sensors connected to the auxiliary I2C bus of the MPU-9250. This allows your microcontroller to act as the I2C master, controlling and exchanging data with the external sensors.
Please note that the specific configuration and implementation details may depend on the MPU-9250 library or code you are using. It's recommended to consult the documentation and examples provided with the library or code for further guidance on utilizing the Pass-Through Mode for the MPU-9250's auxiliary I2C bus."""
I find the datasheet that i attached... As i want to understand more, also if i don't have a specific formation but i'm only a self-taught, i would like to understand how to connect the bpm280 in pass-though mode (pag. 23)... only to see if i can know something new.
Is correct the anwer of chatGPT? And how i can find the libreries that openplotter is using and eventually cange it? (if it is this the correct way)
If someone have time to explain me how to do it i would be very gratefull (also if i'm going to use baltika_no_9 suggestion/solution).
i try to ask it to chatgpt:
To use the Pass-Through Mode of the MPU-9250's auxiliary I2C bus in a Raspberry Pi environment, you can follow these steps:
Make sure you have the necessary libraries installed on your Raspberry Pi to communicate with the MPU-9250 and the external sensors. The most common library for I2C communication on Raspberry Pi is smbus. You can install it by running the following command in your terminal:
arduino
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sudo apt-get install -y python3-smbus
Connect the MPU-9250 and the external sensors to the appropriate GPIO pins of the Raspberry Pi. Connect VCC and GND to the respective power and ground pins of the Raspberry Pi. Connect SDA and SCL to the corresponding I2C data and clock pins (e.g., GPIO 2 and GPIO 3).
Ensure that the I2C interface is enabled on your Raspberry Pi. You can enable it by following these steps:
Run sudo raspi-config in the terminal.
Select "Interfacing Options."
Select "I2C."
Choose "Yes" to enable the I2C interface.
Reboot the Raspberry Pi for the changes to take effect.
Install the mpu9250 Python library on your Raspberry Pi. This library provides an interface to interact with the MPU-9250 sensor. You can install it using the following command:
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pip install mpu9250-raspberrypi
Write your Python code to configure the MPU-9250 into Pass-Through Mode and communicate with the external sensors connected to the auxiliary I2C bus. Here's an example code snippet to get you started:
python
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import smbus
from mpu9250 import MPU9250
# Create an instance of the I2C bus
bus = smbus.SMBus(1) # Use 1 for Raspberry Pi 3, or 0 for earlier versions
# Define the MPU-9250 address
mpu9250_address = 0x68 # Use 0x69 if AD0 is pulled high
# Create an instance of the MPU9250 class
mpu9250 = MPU9250(bus, mpu9250_address)
# Configure MPU-9250 into Pass-Through Mode
mpu9250.set_pass_through_mode(True)
# Perform I2C operations with the external sensors connected to AUX_DA and AUX_CL pins
# Use the standard SMBus operations like bus.write_byte(), bus.read_byte(), etc.
# Example: Read from an external sensor
external_sensor_address = 0x12
register_address = 0x20
data = bus.read_byte_data(external_sensor_address, register_address)
print(f"Data from external sensor: {data}")
# Restore MPU-9250 back to normal mode if needed
mpu9250.set_pass_through_mode(False)
Modify the code according to your specific external sensor's I2C address and the operations you want to perform.
Run the Python code on your Raspberry Pi and observe the output. Make sure you have proper wiring and connections to the MPU-9250 and the external sensors.
This should give you a starting point for using the Pass-Through Mode of the MPU-9250's auxiliary I2C bus in a Raspberry Pi environment. Remember to refer to the documentation and examples of the mpu9250 library for more details and advanced usage.
"""
Is it correct? Is it possible to reverse it if something goes wrong?