<![CDATA[Ultrasonic I2C problems]]>I have a problem with the I2C version of the Ultrasonic distance measuring unit. If I connect it together with the MLX90640 Thermal Camera Unit the Camera data is corrupted. If I load and run the Demo and only connect the Ultrasonic distance measuring unit every other sample has the distance 4500mm. If I use this code it works fine in the demo but still corrupts the Thermal camera

uint32_t data;
Wire.beginTransmission(0x57); // Transfer data to 0x57.
Wire.write(0x01);
Wire.endTransmission(); // Stop data transmission with the Ultrasonic Unit.
delay(120);
Wire.requestFrom(0x57,3); // Request 3 bytes from Ultrasonic Unit.
data = Wire.read();data <<= 8;
data |= Wire.read();data <<= 8;
data |= Wire.read();

]]>https://community.m5stack.com/topic/4255/ultrasonic-i2c-problemsRSS for NodeThu, 30 Apr 2026 06:20:55 GMTFri, 29 Apr 2022 18:02:47 GMT60<![CDATA[Reply to Ultrasonic I2C problems on Sat, 19 Nov 2022 21:11:08 GMT]]>It seems if I set the i2c rate to 100Khz this works.

]]>https://community.m5stack.com/post/19336https://community.m5stack.com/post/19336Sat, 19 Nov 2022 21:11:08 GMT