[Solved] After running sudo i2cdetect -y 1, you see the following output snippet: 0 1 2 3 4 5 6 7 8 9 a b c d e f 00: -- -- -- -- -- -- -- -- 10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 20:... | Raspberry Pi

Raspberry Pi - I2C Communication

After running sudo i2cdetect -y 1, you see the following output snippet:

     0 1 2 3 4 5 6 7 8 9 a b c d e f
00:          -- -- -- -- -- -- -- -- 
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
70: -- -- -- -- -- -- --

What does this output indicate?

ANo I2C devices detected on bus 1

BMultiple devices detected on bus 1

CBus 1 is disabled

DScan failed due to permission error

Step-by-Step Solution

Solution:

Step 1: Interpret the i2cdetect output
The output shows all addresses as "--", meaning no devices responded at any address.
Step 2: Understand what "--" means
"--" indicates no device found at that address, so the bus has no detected devices.
Final Answer:
No I2C devices detected on bus 1 -> Option A
Quick Check:
All "--" = no devices found [OK]

Quick Trick: All "--" means no devices detected on the bus [OK]

Common Mistakes:

MISTAKES

Assuming "--" means error or disabled bus
Thinking devices are present despite no addresses
Confusing permission errors with scan output

Master "I2C Communication" in Raspberry Pi

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More Raspberry Pi Quizzes

After running sudo i2cdetect -y 1, you see the following output snippet:

Step 1: Interpret the `i2cdetect` output

Step 2: Understand what "--" means

Final Answer:

Quick Check:

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