Legal Removal Request

Post: Hi sunilvb The ultrasonic sensors arrived and as I suspected both models will not work with the IO Pi Plus. I did have some success using the RCWL-1601 sensors with the I2C Switch. I connected two sensors to the switch, one on channel 1 and one on channel 2 and added 10K pull-up resistors to the SDA and SCL pins on each sensor. I placed both ultrasonic sensors side by side on a breadboard and found that when the RCWL-1601 is being used in I2C mode it appears to be sending pulses continuously as there was some interference between the sensors that caused occasional inaccuracies in the readings. I suspect if the sensors were moved further apart or placed in different directions this would not be an issue. This is the python script I used to test the sensors. It uses the I2CSwitch class from our GitHub repository. [url=https://github.com/abelectronicsuk/ABElectronics_Python_Libraries/tree/master/I2CSwitch]GitHub I2C Switch[/url] [code] import smbus import time import os from I2CSwitch import I2CSwitch # I2C address of the RCWL-1601 sensor SENSOR_ADDRESS = 0x57 # Initialize the I2C bus bus = smbus.SMBus(1) # Use bus 1 for Raspberry Pi def start_ranging_session(): # Write '1' to start ranging session bus.write_byte(SENSOR_ADDRESS, 1) def read_distance(): # Wait a few milliseconds for the measurement to complete time.sleep(0.01) # Read the 3-byte response data = bus.read_i2c_block_data(SENSOR_ADDRESS, 0, 3) # Combine the 3 bytes to get the distance in um (divide by 1000 to get mm) distance_um = (data[0] << 16) | (data[1] << 8) | data[2] distance_mm = distance_um / 1000 return distance_mm if __name__ == "__main__": i2cswitch = I2CSwitch(0x70) i2cswitch.reset() while True: # Set I2C Switch to channel 1 and read the distance i2cswitch.switch_channel(1) start_ranging_session() distance1_mm = read_distance() time.sleep(0.1) # Set I2C Switch to channel 2 and read the distance i2cswitch.switch_channel(2) start_ranging_session() distance2_mm = read_distance() os.system("clear") print(f"Channel 1 Distance: {distance1_mm} mm") print(f"Channel 2 Distance: {distance2_mm} mm") time.sleep(0.5) # Delay between readings [/code]