Samsung S3 random reset solved

I was having plenty of issues with my not so new Samsung S3 (GT-I9305), almost always a GUI reset while making a phone call (the call would drop), sometimes it would take more then a minute to power the screen up, sometimes a freeze while taking pictures.
I tried almost everything, from factory reset, cache delete, even rooted the phone and installed a custom ROM. It would improve things temporarily but then again the same issues.
Looking around internet I found someone with similar issues that said they stopped after changing the SD card. I didn’t believe that could be the solution but tried it anyway and… yes! It worked! The phone now is working great so it was a defective SD card. So if you’re having random issues with your Samsung S3 try it without the SD card or with a new one.

Make a hole in dry wall without making a mess

Ever needed to make a hole in your dry wall but stopped, thinking about the mess it’ll do all over the stuff laying below? Well, this is the perfect solution and using just something that you probably have already:

Yes, you guessed it right, its just a folded up post-it and its all you need! All the dust will fall inside this improvised mini shelf.

TI CC1310 range testing

Just started my holidays on the beach, while here I finally have some time to make some range testing with two CC1310 LauchPads. These LaunchPads come by default with a PCB antenna. I’m going to use only the PCB antenna for my testing.

I’m using one of the TI sample applications and its default configuration:

// Frequency: 868.00000 MHz
// Data Format: Serial mode disable
// Deviation: 25.000 kHz
// Packet Length Config: Variable
// Max Packet Length: 128
// Packet Length: 30
// RX Filter BW: 98 kHz
// Symbol Rate: 50.00000 kBaud
// Sync Word Length: 32 Bits
// TX Power: 14 dBm (requires define CCFG_FORCE_VDDR_HH = 1 in ccfg.c, see CC13xx/CC26xx Technical Reference Manual)
// Whitening: No whitening

For my first test I left the receiver on the balcony of the 5th floor and I walked around the marina. At the other side, about 600 meters away I have this on the receivers log file:

address: 38; adc: 582; rssi: -88
address: 38; adc: 579; rssi: -88
address: 38; adc: 582; rssi: -92
address: 38; adc: 580; rssi: -96
address: 38; adc: 583; rssi: -95
address: 38; adc: 585; rssi: -95
address: 38; adc: 583; rssi: -93
address: 38; adc: 580; rssi: -90
address: 38; adc: 583; rssi: -97
address: 38; adc: 583; rssi: -97

This is the aerial picture of the test area:

Image

On the other side at 600m it is hard to see the balcony:

Image

I’ll improve the test program to make sure its not loosing packets and I’ll continue my testing soon.