Comments on: Magnetometer with Raspberry PI computers: GY-271 HMC5883L wiring and code https://peppe8o.com/magnetometer-with-raspberry-pi-computers-gy-271-hmc5883l-wiring-and-code/ Raspberry PI, Arduino and Electronics made simple Fri, 22 Mar 2024 14:40:33 +0000 hourly 1 https://wordpress.org/?v=6.9.4 By: peppe8o https://peppe8o.com/magnetometer-with-raspberry-pi-computers-gy-271-hmc5883l-wiring-and-code/#comment-20971 Mon, 28 Aug 2023 17:45:15 +0000 https://peppe8o.com/?p=6039#comment-20971 In reply to Amie.

Hi Amie,
I’ve never tested different I2C buses on Raspberry PI. From what I can read on the web (but never tested), you should enable the new I2C buses from the config.txt file and then reboot. Then, you should try if the Raspbrry PI can detect it with the sudo i2cdetect -y 3. I must suppose you already did these steps and worked for you.
Now, from Raspberry PI, when you scan the I2C bus for the remote device addresses, what address do you read?

]]> By: Amie https://peppe8o.com/magnetometer-with-raspberry-pi-computers-gy-271-hmc5883l-wiring-and-code/#comment-20970 Sun, 27 Aug 2023 22:04:55 +0000 https://peppe8o.com/?p=6039#comment-20970 Hi. I’m using bus 3 instead of bus 1 and was wondering where i can change the code. right now i’m getting an I/O error

]]> By: peppe8o https://peppe8o.com/magnetometer-with-raspberry-pi-computers-gy-271-hmc5883l-wiring-and-code/#comment-15455 Fri, 27 May 2022 16:47:52 +0000 https://peppe8o.com/?p=6039#comment-15455 In reply to Evan.

Great comment, Evan. Thank you.
The Gauss value should be the same both during calibration and usage script. I’m going to correct and align both to one value

]]> By: Evan https://peppe8o.com/magnetometer-with-raspberry-pi-computers-gy-271-hmc5883l-wiring-and-code/#comment-15451 Fri, 27 May 2022 15:55:57 +0000 https://peppe8o.com/?p=6039#comment-15451 I noticed the guass value differs in the calibration script and in the i2c_hmc5883l script. Should those values match? What effect does adjusting those values have?

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