Chat

What do you want to build today?
Sign up to send

Files

Schematic

Layout

Preview

wwht is this pin function and should it be connected to SDO1
sam2231

sam2231

@copilot wwht is this pin function and should it be connected to SDO1
2y

copilot

Let's break this down:
  1. Pin Information:
    • BMI088: SDO1 (Pin 15):
      • This is an SPI Serial Data Output line, and in SPI mode, it serves as the MISO (Master In Slave Out). This pin is typically used to send data from the BMI088 to the master device (e.g., your ESP32-WROVER-E).
  2. Current Connection:
    • According to your project, U1 SDO1U1 \, SDO1-ESP1 IO19ESP1 \, IO19 is connected as follows:
      • Connect U1:SDO1U1:SDO1 to ESP1:IO19ESP1:IO19.
  3. Is it correctly connected?
    • Yes, SDO1SDO1 on the BMI088 should be connected to an SPI input (MISO) pin on the ESP32-WROVER-E, which is appropriate here. The ESP32 IO19 is configured as the MISO pin in many SPI applications.
In summary, the pin function for SDO1 on the BMI088SDO1 \, on \, the \, BMI088 is correct, and it should indeed be connected to the equivalent SPI MISO pin on the ESP32-WROVER-E, which is IO19IO19.
2y
sam2231

sam2231

i mean SDO2 should this be connected to SDO1 or should it be Float , wwhere it should be connected
2y

copilot

I understand now. You're referring to the SDO2 pin on the BMI088. Let's clarify its function and connection:
  1. Pin Function:
    • BMI088: SDO2 (Pin 10)
      • In SPI mode, this pin acts as SDO2, which is another SPI Serial Data Out line.
      • Alternatively, in I2C mode, this pin can be used to set the I2C address of the gyroscope. Its state (either pulled to ground or VDDIO) determines the I2C address [1] and [2]:
        • Pulled to GND: $0x68$.
        • Pulled to VDDIO: $0x69$.
  2. Connection Options:
    • If you're using the BMI088 in SPI mode, you can generally leave SDO2 unconnected (floating) since it is not required for standard SPI communication.
    • If you're using the BMI088 in I2C mode, you will need to connect SDO2 to either GND or VDDIO to set the appropriate I2C address.
Recommendations for Your Project
Given that your project seems to use SPI, you can follow these steps:
  1. Leave SDO2 Floating:
    • You can leave SDO2 unconnected if there's no specific requirement for its connection in SPI mode.
  2. Consistency with SPI Mode:
    • Ensure that the Pin 7 (PS) of BMI088 is correctly configured for SPI mode. According to the datasheet, the U1 should be set to the appropriate state for SPI.
To summarize:
  • If you're operating the BMI088 in SPI mode, SDO2 should typically be left unconnected (floating).
  • In I2C mode, SDO2 must be connected to either GND or VDDIO to set the correct I2C address.
[1] Page 41
[2] Page 36
2y
Someone is typing...
3
How can i connect M1 and ESP1 toghether
sam2231

sam2231

@copilot How can i connect M1 and ESP1 toghether
2y

copilot

To connect M1 and ESP1 together, you need to establish connections for power, ground, and communication lines (assuming M1 is a sensor module with various signals, and ESP1 is an ESP32 module).
Assumptions:
  • M1 has an I2C interface for communication.
  • ESP1 will use the I2C lines to communicate with M1.
Connections:
  1. Power Supply:
    • M1:3V3 to ESP1:3V3 (Both components require a 3.3V supply).
  2. Ground:
    • M1:GND to ESP1:GND (Connecting the ground of both components).
  3. Communication (I2C):
    • M1:I2C_SCL to ESP1:IO22 (I2C SCL line).
    • M1:I2C_SDA to ESP1:IO21 (I2C SDA line).
  4. Interrupts (Optional, if needed):
    • If you need to use the interrupt lines from M1 to ESP1, you can connect them to any available GPIO pins. For example:
      • M1:INT1_ACCEL to ESP1:IO32.
      • M1:INT2_ACCEL to ESP1:IO33.
      • M1:INT3_GYRO to ESP1:IO34.
      • M1:INT4_GYRO to ESP1:IO35.
Summary of Connections:
  • Connect M1:3V3 to ESP1:3V3.
  • Connect M1:GND to ESP1:GND.
  • Connect M1:I2C_SCL to ESP1:IO22.
  • Connect M1:I2C_SDA to ESP1:IO21.
Optional:
  • Connect M1:INT1_ACCEL to ESP1:IO32.
  • Connect M1:INT2_ACCEL to ESP1:IO33.
  • Connect M1:INT3_GYRO to ESP1:IO34.
  • Connect M1:INT4_GYRO to ESP1:IO35.
This setup will allow the ESP32 to communicate with the sensor module via the I2C protocol and handle any optional interrupts if needed. Let me know if you need further adjustments or specific configurations!
2y
sam2231

sam2231

@copilot i need to use the SPI communication
2y

copilot

To use SPI communication between ESP1 and M1, we need to identify the appropriate SPI pins on both components. I'll assume the following typical SPI pin naming conventions for M1:
  • MISO (Master In Slave Out)
  • MOSI (Master Out Slave In)
  • SCK/CLK (Serial Clock)
  • CS (Chip Select)
Here is how you can make the SPI connections:
Connections:
  1. Power Supply:
    • M1:3V3 to ESP1:3V3 (Both components require a 3.3V supply).
  2. Ground:
    • M1:GND to ESP1:GND (Connecting the ground of both components).
  3. SPI Communication:
    • M1:MISO to ESP1:IO19 (MISO).
    • M1:MOSI to ESP1:IO23 (MOSI).
    • M1:SCK/CLK to ESP1:IO18 (Clock).
    • M1:CS to ESP1:IO5 (Chip Select).
  4. Optional Interrupts:
    • If you need to use the interrupt lines from M1 to ESP1, you can use available GPIO pins.
Summary of Connections:
  • Connect M1:3V3 to ESP1:3V3.
  • Connect M1:GND to ESP1:GND.
  • Connect M1:MISO to ESP1:IO19.
  • Connect M1:MOSI to ESP1:IO23.
  • Connect M1:SCK/CLK to ESP1:IO18.
  • Connect M1:CS to ESP1:IO5.
Optional:
  • Connect M1:INT1_ACCEL to ESP1:IO32.
  • Connect M1:INT2_ACCEL to ESP1:IO33.
  • Connect M1:INT3_GYRO to ESP1:IO34.
  • Connect M1:INT4_GYRO to ESP1:IO35.
This setup will enable SPI communication between the ESP32 and the sensor module. Let me know if you need any further assistance or specific adjustments!
2y
Someone is typing...
2
ESP1
U2
U1
DataAqusition thumbnail