And while my Pis update - I'll tell you how I saved another Pi 5 today.
It arrived brand new with no shorts, all voltages present.
No missing components.
No broken or burned traces.
Nothing shows up on UART. Customer bought it like that.
So I reflowed the CPU, RAM and RP1 to be on the safe side and right after that I noticed this little prick - a 10K resistor simply got cracked in half 🤯.
Pure luck 🍀.
@in_sympathy Have you seen any Pi5 that lost I2C functionality after working fine for a long time?
On of my Pi5 robots used I2C to read a volt/amps sensor several times a second, but started crying one day. I had to revert him to a Pi4 since I didn’t have a spare Pi5.
Pretty cool you understand enough to repair a Pi in this “replace it” world.
@in_sympathy
> is it really a hardware fault?
Tested:
- Clean Pi OS (Robot was running Ubuntu 22)
- other I2C sensors
The Pi5 works great otherwise, SPI, cooler, RTC, WiFi all work. Just stock I2C failed.
Back filling with a Pi4 was the easiest to get robot "Kilted Dave" to stop crying. (Kilted Dave runs ROS 2 Kilted Kaiju.)
@cyclical_obsessive Dave looks awesome 👏🏻.
As for the I2C - sadly that’s one more case of failed repairability - too bad #raspberrypi won’t sell their #RP1 chip separately😔.
Hopefully someday @iFixit will help us with this one😉.
For now we can only read about it here:
https://datasheets.raspberrypi.com/rp1/rp1-peripherals.pdf
Good thought, but I don't see anything broken or gone. Those sure are the tiniest components I've ever inspected.
This Pi5 sits in a case next to a Pi3 and a Pi4 - all three wishing for some great project Idea. The Pi3 has a camera and mic that ran BirdNet for a while till I realized the Mockingbird was playing with me.
in_symathy
cyclical_obsessive