I2C Device found at address: 0x7F why 0x7f>>>>> plz help

Because you have an I2C device attached to SCA/SCL and it has a (configurable) address of 0x7f.

[image] xcode000: I2C Device found at address: 0x7F According to the I²C standard (UM10204) there are several addresses are reserved. They are as follows: 0x00: General call address 0x01–0x07: Reserved for future use 0x78–0x7F: Reserved (these are not valid normal addresses) It happens: S…

[image] gilshultz: I2C scanners may report a device at 0x7F Right. Only addresses are excluded where the address byte is not acknowledged by any slave.

“Why is I2C device found at address 0x7F? What is your device type?

[image] ruilviana: What is your device type? Supposedly [image] gilshultz: Some I2C scanner

What is the device you have connected? If you're not sure what it is, a picture might help.

[image] xcode000: I2C Device found at address: 0x7F Might it be a wrong offset, meaning device 0x00 which is the broadcast address?

[image] xcode000: I2C Device found at address: 0x7F why 0x7f This address is resulf of I2C scanner? Are you using Arduino? ESPxxxx or other processor? Do you have like this? [image] Or like this? [image]

I’m using an ESP32-S3 with the MLX90614 infrared temperature sensor but facing continuous communication failure. I’ve tested multiple MLX90614 modules and multiple ESP32-S3 boards. I connected the sensor using I2C with SDA on GPIO 19 and SCL on GPIO 20. Despite trying different GPIO pins and scannin…

Why is MLX90614 found at address 0x7F?

Projects Networking, Protocols, and Devices

ZX80 July 31, 2025, 3:16pm 17

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Why is MLX90614 found at address 0x7F?

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