The good thing is that the 328PB has much more peripherals compared to the 328P, you've got 5 timers, 2 UARTs... So we can say that we were not scammed, quite the opposite :'D And the other thing is that with my nano board I noticed the TX pin always on when I first plug the board, but I was able to reprogram it by selecting the ATMEGA328P old bootloader... Cheers

The most frustrating thing is that these 328PB products are still sold as and even labeled as 328P as you mention. I have two boards with these two chips, I plugged them in both not working, tried a lot of stuff and finally I discovered that 328PB exists... 😂🤣 After that I found your video. Thanks and subscribed, nice job.

WARNING! The ATmega328PB is NOT a drop in replacement for the ATmega328P. TLDNR See Atmel Technical Note AT15007 "Differences between ATmega328P and ATmega328PB" for more information. Of particular concern is that two of the pins that are used for VCC and GND on the ATmega328P are now I/O pins on the ATmega328PB. Pin 3 is GND on the ATmega328P but is PE0/SDA1/ICP4/ACO/PTCXY on the ATmega328PB. While pin 6 is VCC on the ATmega328P but is PE1/SCL1/T4/PTCXY on the ATmega328PB. If the PCB is made as per the original Nano spec for an ATmega328P then pins 3 and 6 will be connected to the GND and VCC rails respectively. If you use an ATmega328PB firmware and enable either of these pins as output things are not going to end well. Pins 19 and 22 have additional functionality on the ATmega328PB but at least these pins are taken out to the ADC6 and ADC7 pins on the Nano. Pin 19 on the ATmega328PB is PE2/ADC6/PTCY/ICP3/SS1 while pin 22 is PE3/ADC7/PTCY/T3/MOSI1. The technical note does, however, state that the ATmega328PB is fully software compatible with the ATmega328P so it "should" be possible to upload a Nano firmware to this device and use it as an ATmega328P without the additional features of the ATmega328PB. This assumes that there are no bugs in the firmware which alter any unused/reserved bits in the ATmega328P registers that are used by the ATmega328PB. Such bugs would go unnoticed on an ATmega328P but may cause issues when executed on an ATmega328PB. This caveat also applies to any libraries used. As others have commented the old Nano bootloader appears to work but the new one does not, this may be the reason why. The Arduino IDE will not program the Nano bootloader into the ATmega328PB because it has a different signature to the ATmega328P and AVRDude checks this signature before uploading anything. It is, however, possible to upload the firmware from the command line using AVRDude with the -F switch. The -F switch (note upper case) forces AVRDude to ignore the signature bytes and upload the firmware. The ATmega328PB also has additional fuse bits and uses a low power oscillator, the rail to rail oscillator option is no longer present. This low power oscillator has a clock failure detection (CFD) circuit and fuse which force the ATmega328PB to revert to an internal 1MHz Calibrated RC Oscillator when it detects missing pulses. This clock failure detection can occur due to poorly routed boards that would not be a problem with a rail to rail oscillator. CFD can only be recovered by power cycling or a hard reset. This can result communication issues and other errant behaviour. caveat emptor

I got some of these a couple of days ago and finally got them working fully. Initially using "old bootloader" worked. Various reports said the old bootloader has bugs so I wanted to update it. I tried usbasp but that failed because it said it was the wrong chip signature. I tried adding a 328pb board but the implementation I tried failed with a strange avrdude error message when I tried to write the bootloader. After readiing a few forums I found out you *can* burn the 328p bootloader by changing the chip spec for the 328pb. That can be done by manually entering the bootloader upload commands it uses with avrdude. When you do that the bootloader will lie to the IDE and it will behave pretty much like a normal 328p thereafter. The two chips are apparenly so similar that will work: but you can't use any new features in the 328pb. After finding that solution I found the bug in the other board implementation and now everything works fine.

Thanks for this. It was driving me crazy! I ordered 328P and that's what the listing said, but received 328PB and ran into problems as you can imagine. 6 hours later I zoomed in on the chip to see the faint 328PB stamped and not 328P.

I've had permission issues with Arduino boards and Linux, a simple chmod tends to solve it.

This saves my day, thanks! I ordered from Mouser wrong chip: Atmega328pb and having problem uploading anything to ICT tracker (for tracking high altitude balloons). Now, I will try to do it again with method you described.

It was a Very useful video. Very less people noticed that Arduino UNO and Nano Clone board are available in market using ATmega 328 PB chip-set. This board after programming using ARduino UNO board Selection, it Upload codes. Some Time it Works Properly and Maximum time it works abruptly, Freezes, Restart and many issues. I am a Hobbyist and Academic Project developer and I have many Arduino UNO Board with Atmega328 PB Chipset. Finding for the Solution for this clone board and your this video was helpful for me. Thanks a Lot.

Got this 328PB Version and after trying many things i discovered ... you can use the standard Nano Settings - BUT you must use ATmega328P (Old bootloader) as the Programmer and everything is ok 🙂

Thankyou for the video...... It helped me a lot

Just for the record maybe someone will find it useful. Some Pro-Mini 3.3v with 328PB they refused to upload code from Serial/FTDI no matter if the bootloader is OK. Try to upload the sketches via programmer, maybe it will work.

Thanks for the video, you saved three Arduinos from going to trash :)

I have the same problem with the Chinese Ardunio NANO that comes with the MEGA328PU - TH chip. I can't write the bootloader to it, in the IDE this message comes: avrdude: Expected signature for ATmega328P is 1E 95 0F Double check chip, or use -F to override this check. Does anyone know how to use -F to override this check or solve this problem?

Serial monitor changes if touching the pins.

thankyou sir

Did you have to figure all this out yourself? It strikes me as strange that anyone could make a product this incompatible with no instructions about how to use it.

I tried to find the library and it is gone.😢

I've done everything I can think of with an Arduino Uno with 328PB but no luck any tips?